Mix Back User Guide - Hear Technologies!
Contents
1. SPECIFICATIONS Passive Microphone Split Each Channel Mic In to Mic Out Passive Talkback Mic Pre Amplifier Conditions 40 dBu input 150 Q Balanced Mic Power 18 VDC Frequency Response 20 Hz to 20 KHz 1 5 dBu Pin 1 Lift Output XLR Mic Input to Insert Output Conditions 14 dBu input Gain full CCW 150 Q Balanced Gain Off to 50 dBu variable Line Output 121 Q TRS Balanced Input Impedance 1K Q balanced Frequency Response 20 Hz to 20 KHz 0 05 dBu THD 0 05 10 Hz to 120 KHz 0 3 dBu IMD 0 09 THD N 0 002 22 Hz to 22 KHz unweighted Remote Control 1 12 ST1 ST2 COM ALL IMD 0 003 EIN 121 dBu 150 Source 40 dBu input Mic Pre to Master Output Conditions 0 dBu input Gain full CCW 150 Balanced Remote Cable Effects FX Return Conditions 4 dBu input 150 Balanced CAT5e 500 ft max wired pin to pin Frequency Response 20 Hz to 20 KHz 0 5 dBu Frequency Response 20 Hz to 20 KHz 0 5 dBu Gain FX return to Master 1 dB Master at center THD N 0 004 22 Hz to 22 KHz unweighted THD N 0 0025 20 Hz to 20 2 IMD 0 004 IMD 0 0027 20 Hz to 20 2 Maximum Gain 60 dBu EQ Flat Line Inputs to Insert Outputs Conditions 18 dBu input Gain full CCW 150 Q Balanced Input Imedance 10K Q balanced Frequency Response 20 Hz to 20 KHz2. OUTPUT CHANNELS ST1 L R MONO 1 6 OUTPUT CHANNELS ST2 L R MONO 7 12 HEADPHONES LOCATED ON FRONT PANEL AFL HP SELECT SELEC RIGHT GANGED SWITCH ST2 LEFT ET p IDEST SUC CLOCK ST2 RIGHT d T 48 KHz SELECT SEND l FROM eee VOL BUSSES MONOT STLUR A D CONVERTER ST2UR HONO 2 ADAT HEAR BUS 15 3 4 LOGIC MONS o Mono 5 6 4 4 mono 7 8 T 9 10 MONOS MONO 11 12 MONO 6 7 c aa MONO 8 i 13 4 O OUTPUT 9 10 aB O O METER MONO 10 732 dB O O MONO 11 gt MONO 12 gt 0624224299929992299 5565665556 2 of 2 Conooszzzzzzzzzzzz cr HOOK UP DIAGRAM Mic DAW or Recorder Two Mix mix back remote Mix Back Talkback Remote 15 Talkback Mix Back Mixer TB OUT 15 Sieve MIC 14 OIM Qm 9 BONS CH 13 INSERT CH 14 INSE CH 12 INSERT CH 11 TALKBACK REMOTE HearBus ADAT OUTPUTS ADAT HearBus CLOCK SELECT Las Ke Percy LINE IN OUT pr BUSS INPUTS STLR 1 2 3 4 5 s
3. Mix Back User Guide do 16 HOOK UP DIAGRAM LIVE PA HEAR BACK AND RECORDING Mix Back Mixer LINE IN MIC CH6 INSERT Talkback Mic I 1 INSERT INSERT INSERT INSERT INSERT INSERT INSERT INSERT INSERT INSERT INSERT INSERT INSERT INSERT INSERT MIC IN OUT rane i TALKBACK HearBus ADAT OUTPUTS 1 6 7 12 CLOCK SELECT ne ven Digital Recorder or DAW BUSS INPUTS STIR 1 2 3 4 5 6 FX RETURN LINE IN OUT STIL SLEEVE SHIELD mix back remote SI2L 5128 Mix Back Talkback Remote Fe FX SEND mix back OUTPUTS ST2L ST2R 7 8 9 10 12 FX2 EnA MEN System rage MIXER OUTPUTS ANALOG INPUTS WARNING Ern cc Up 8 Mixers 4 17 Mix Back User Guide CE ADATIN HearBus HearBus IN OUT MIXER OUTPUTS ANALOG INPUTS DA 88 ANALOG CABLE Up to 8 Mixers Ce hear back MULTI ZONE BACKGROUND FOREGROUND MUSIC WITH PAGING Mix Back works great as a zoned music system with paging You can have up to eight stereo sources and zones or up to fourteen mono zones and sources When using mono zones p
4. 5 CE xau xo ar In az 5 gt 2 a zu Au ab xU 23 2 20 SG 29 Xo XE Ex ix X lt nz mz mi a2 c ii NE Fa Fe Es Mix Back User Guide 13 FX2 SND MONO 3 MONO 4 MONO 5 MONO 6 MONO 7 MONO 9 MONO 10 MONO 11 MONO 12 MIX BACK BLOCK DIAGRAM 571 L VOL BUSS STI R VOL BUSS FX2 SEND 11 __a LEFT ST2 L VOL BUSS STi RIGHT 572 VOL BUSS MONO 1 VOL BUSS v ST2 LEFT ST2 RIGHT MONO 2 VOL BUSS MONO 3 VOL BUSS gt i MONO 4 VOL BUSS lt gt i MONO 5 VOL BUSS gt i MONO 6 VOL BUSS e gt MONO 7 VOL BUSS D i MONO 8 VOL BUSS gt MONO 9 VOL BUSS gt i MONO 10 VOL BUSS e gt MONO 11 VOL BUSS NN VV VONT ST NIE NP gt E MONO 12 VOL BUSS E EX SNB SND AA 5 Mix Back User Guide HP VOLUME gt A FEN
5. auxiliary matrix monitor and or direct outputs TALK BACK 600 MV The Talk Back 600 MV adds talk back monitor master volume monitor switching and monitor dimming capability to recording consoles digital hard disc recording systems and portable audio workstations Intended applications include professional and project recording studios and video post production facilities The Talk Back 600 MV provides control room talk back to the talent Talk Back permits the engineer to control talk back and monitor switching from the front panel and or multiple wired remote controls models RC 1 and RC 2 Optional IR wireless Producer Remotes are available for control of the talk back function models IR 1 and IR 2 and may be used in conjunction with wired remotes The unit s features and specifications rival those found only in large format recording consoles Wired and Wireless Remotes IR RC Hear Back Hub Hear Back Mixer EXTREME EXTENDERS The Extreme Extenders were designed to solve Optical distance limitations Using CAT5e the effective length of an ADAT Optical interface can be extended up to 500 feet without any loss of audio quality The ADAT Thru output provides a buffered pass thru for connection to local ADAT devices extender Bak in extreme extender out Extreme Extender Extreme Extender ADAT In ADAT Out HEARBUDS amp HEADSET MONITOR Hearbuds provide an
6. gt gt NZ ae GE zu D D o o o rod a XD vuz Ld M PE 5 SF 4 Ew E lt 5 o az g 9 N s 9a E 5 E 2 oo o N 5 5 5 85 x t z 1 a E i g Hx z es ent pente 2 a a 4 x 2 4 i x E P m 5 E E E 5 5 t a 2 5 a a a a a a a s 2 a a Ai E 0 D 0 D F F em N a c c Er c c ci af c zi m o ol sz zo oa a a g o go gao go oxa 5 8 E 2 5 5 2 5 amp ing amp amp amp amp E lt 2 5 5 Q 9 2 Zo 7 uo o eV SEL Feet ET RER om 55 9 520 9 2 woo Fa E NOTE ONLY 55 INPUTS ST1 MONO 1 AND MONO 12 SHOWN FOR CLARITY 18 dB PAD 2 x y E d E E E P 3 5 Lot sei t 1 T ut JU JU Ji Ju L lt lt lt H gt ga c ozy EE GE EE 55 zc Eu Ew gs 2 B N 45 55 45 55 LE Un Oa ne lt
7. affordable in ear monitor headset that delivers professional performance at great value By creating acoustic chambers at the ear hearbuds not only dramatically improve the sound of standard in ear headphones and ear pieces their molded 100 silicon design also significantly reduces unwanted background noise levels enabling you to enjoy sound clarity at lower volumes And because they re audiologically designed they re comfortable to wear and won t fall out of your ears CABLES Hear Technologies offers a variety of quality cables that work with your system including CAT5e Optical and Analog DA 88 style cables Mix Back User Guide 22 Glossary of Terms 1 More Me This term refers to personal individual monitoring levels Example When the talent tells the engineer need to hear more 2 FOH Acronym which means Front Of House such as FOH mixer 8 PA Stands for Public Address such as a sound system to make voice or music louder 4 Perfect Mix Used by Hear Technologies to explain the baseline mix You may think of it as any of the following Control Room Mix also known to as two mix A stereo FOH mix the PA CD recording e What you re selling When using conventional monitors musicians and singers hear direct and reflected sound allowing them to experience spatial sound information When using in ear monitors the talent have their ears plugg
8. mono 7 12 HearBus Outputs 2 Assigned like outputs RJ45 Pin Outs Pin Function Pin Function 1 Digital Audio 5 18 VDC 2 Digital Audio 6 Ground 3 Ground 7 18 VDC 4 18 VDC 8 18 VDC ADAT HearBus Clock Frequency Selector 44 1 KHz or 48 KHz e Buss Inputs 20 ST1 L R ST2 L R mono 1 12 and FX1 FX2 stereo returns Used for linking mixers together o Analog Outputs 18 ST1 L R ST2 L R mono 1 12 FX1 and FX2 sends balanced e Universal AC Power Supply Input 100 240 VAC 50 60 Hz e AC Power Switch TB our OOOO 00006 666006666 6666066066 66606000060 Mix Back User Guide 8 TALKBACK REMOTE CONTROL Optional Remote Output The Mix Back Remote is connected to the Mix Back using standard CAT5e cable wired 1 to 1 Switches 1 12 Routes the talkback microphone to the corresponding Mix Back master sections Very useful for talking to a particular me output Talkback is useful for live and studio personal cue ST1 ST2 When selecting ST1 and or ST2 Switches one can talk to everyone listening to those corresponding stereo mixes COM The COM button turns on the talkback balanced output connector on the rear panel and closes the talkback relay for light beacons dimming module for control rooms the Talk Back 600 MV logic input etc ALL The ALL swit
9. OUT 5 1 572 amp SEL E PHONES 999999999 MASTER Power LED Indicator e UV LED Lamp BNC connector CAUTION Use Only Hear Technologies UV LED Lamp This connector not intended for other style lamps Talkback level control Stereo Auxiliary input level controls To Stereo 1 and to Stereo 2 Masters Effects 1 to ST1 ST2 and Effects 2 to ST1 ST2 level controls Adjust the amount of each effects return into Stereo 1 and Stereo 2 master busses Stereo 1 L R Master level control Stereo 2 L R Master level control Mono 1 thru 12 Master level controls Note All Master level controls control the analog HearBus and ADAT outputs simultaneously Meter Headphone switches AFL After Fade Listen for all masters including effect sends Push a switch to select the relative VU meter and headphone amplifier Headphone level control Follows AFL switches and adjusts level in headphones Headphone Output QD Talkback Mic Input XLR Talkback Output TRS Balanced Stereo Aux Inputs TRS Balanced L R Talkback Relay contacts for light beacon Control Room monitor dimming or logic contacts NOTE Not for inductive loads Talkback Remote Control Input Connects up to 500 feet away using a standard CAT5e cable which provides power and communications ADAT Optical Outputs 2 Assigned as ST1 L R mono 1 6 and ST2 L R
10. 0 3 dBu Maximum Input Level 10 dBu control centered Stereo Aux Input Conditions 4 dBu input 150 Q Balanced THD N 0 005 22 Hz to 22 KHz unweighted Frequency Response 20 Hz to 20 KHz 0 5 dBu IMD 0 005 Gain Off to 6 dBu Aux to Stereo Masters Input Impedance 10K Q balanced THD N 0 0033 20 Hz to 20 KHz Attenuation 18 dB Channel Equalization Hi Frequency 10 KHz shelving 15 dB IMD 0 004 20 Hz to 20 KHz Input Imedance 10K Q balanced Hi Mid Frequency 500 Hz to 15 KHz 15 dB Lo Mid Frequency 50 Hz to 3 KHz 15 dB 8 dBu Power Supply Universal 100 to 240 50 60 Hz Maximum Input Level Input Voltage Lo Frequency 100 Hz shelving 15 dB Input Current 2 Amps Hi Pass Filter 100 Hz 3 pole 18 dB Octave Buss Inputs to Master Outputs Conditions 4 dBu input 150 Ohms Balanced Maximum Continuous Input Power 40 Waits Fuse Internal 3 15 Amp Frequency Response 20 Hz to 20 KHz 0 2 Inrush 60 Amps 2 mSec THD N 0 005 Short Circuit Protection Yes IMD 0 005 AC Input Connector IEC 320 C14 International Input Impedance Digital Output ADAT Output 10K Q balanced 24 Bit 44 1 KHz 48 KHz Selectable Agency Listing FCC class B CISPR 22 class B IEC 60950 1 safety EN 61000 4 2 4 4 4 5 Physical Construction Steel Chass
11. 07 07 08 08 09 10 10 10 10 10 11 11 12 13 15 15 16 17 18 19 20 21 22 23 24 25 safety instructions table of contents introduction to personal monitor mixing general description detail diagrams input channel front panel detail input channel rear rear panel detail master section front panel detail master section rear rear panel detail mix back talkback remote control detail setup and use installation connecting setting gain using talkback using for PA hear back and recording studio cue mixing specifications block diagram hook up diagrams studio 24 more me channels using two mix backs live PA hear back and recording multi zone background foreground music with paging conventional monitor mixing connectors mix back system accessories other hear technologies products glossary of terms limited warranty notes If you need further assistance feel free to contact Hear Technologies technical support by phone at 1 256 922 1200 or visit our web site at http www HearTechnologies com Mix Back User Guide NERA TOR mix back Forget everything you ve ever learned about monitor mixing WHY Better Control of Your Mix In ear monitors IEM and personal monitor mixing provide several benefits above conventional monitoring No feedback now you can EQ the vocal mic Greatly reduced or eliminated stage volume Virtual elimination of room acoustic coloration o
12. O REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE CHASSIS NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL AVIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF NON INSULATED DANGEROUS VOLTAGE WITHIN THE PRODUCT S ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK TO PERSONS THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE A IMPORTANT OPERATING AND MAINTENANCE SERVICING INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE UNIT IMPORTANT SAFETY INSTRUCTIONS Read all safety and operating instructions before using this product 2 All safety and operating instructions should be kept for future reference 3 Read and understand all warnings listed on the operating instructions 4 Follow all operating instructions to operate this product 5 This product should not be used near water i e bathtub sink swimming pool wet basement etc 1 Mix Back User Guide 11 12 20 Only use dry cloth to clean this product Do not block any ventilation openings It should not be placed flat against a wall or placed in a built in enclosure that will impede the flow of cooling air Do not install this product near any heat sources such as radiators heat registers stove or other apparatus including heat producing amplifiers that produce heat Do not defeat the sa
13. TM user guide hear TECHNOLOGIES MASTER MASTER rt os n d a 2 5 ae 4 LI v x Soe s jo y OS 9 amp d c e os n a E Cy K mises c amp amp 5 ENGLISH Danger Exposure to extremely high noise levels may cause a permanent hearing loss Individuals vary considerably to noise induced hearing loss but nearly everyone will lose some hearing if exposed to sufficiently intense noise for a sufficient time The U S Government s Occupational Safety and Health Administration OSHA has specified the following permissible noise level exposures DURATION PER DAY HOURS SOUND LEVEL dB 8 6 4 3 2 1 90 93 95 97 100 103 According to any exposure in the above permissible limits could result in some hearing loss Ear plugs or protectors in the ear canal or over the ears must be worn when operating this amplification system in order to prevent a permanent hearing loss If exposure in excess of the limits as put forth above to insure against potentially harmful exposure to high sound pressure levels it is recommended that all persons exposed to equipment capable of inducing high sound pressure levels such as this amplification system be protected by hearing protectors while this CAUTION unit is in operation RISK OF ELECTRIC SHOCK CAUTION T
14. aging talkback occurs on both left and right of the two stereo ST1 L R and ST2 L R outputs Stereo Multi channel Music Source HOOK UP DIAGRAM Note Paging talkback does not duck the music but it is adjustable to overcome the music The talkback Intercom relay can trigger other devices such as pre recorded messages lamps or other control device Left 8 Right 7 Left Right 8 7 Right 6 Right Left Right 1 Left Right 2 1 Talkback Mic o CH 13 INSERT CH 15 INSERT CH 14 INSERT Relay contacts for l dimming music source if available 2 TALKBACK HearBus ADAT OUTPUTS REMOTE MIC 10 INSERT ADAT HearBus CLOCK Mix Back Mixer MIC9 H9 CH8 INSERT CH7 INSERT CH6 INSERT CH4 INSERT CH3 CH2 INSERT INSERT INSERT LINE IN OUT BUSS INPUTS STIL FX RETURN mix back remote ST2L Mix Back PR 12 FX2L Talkback Remote For Zoned Paging STIL STIR 1 FX SEND 6 FXi mix back Zone 8 Zone 1 Right Left Right Left Right Left 8 8 7 7 6 6 Left 2 Right Left Right 4 4 3 Left 3 Right Rig
15. ave the lowest noise at the input section Always maximize gain and volume level at the input channels then adjust the master levels to the desired output level for lowest noise 2 Repeat step 1 for each channel With all inputs adjusted and with active input signals proceed to set the appropriate level at the master level controls Optimum is normally at 12 o clock 3 If effects are used select the desired P Rs send 1 or 2 to route the channel 1 signal to the desired effects device SEL B Simply select the FX1 or FX 2 switch below the FX send control and then adjust for optimum signal level on the effects input display and the AFL meter a Repeat for each channel b Adjust the master FX1 to ST1 ST2 and FX to ST1 ST2 as desired to obtain the level of effects in each of the stereo masters EFFECTS RTN USING TALKBACK 1 Talkback remote connection Connect the optional remote control to the Mix Back using standard CAT5e cable The connection will work up to 500 feet or 152 4 meters CAUTION NEVER PLUG THE MIX BACK REMOTE INTO THE HEARBUS OUTPUT OR A HEAR BACK HUB MIXER OUTPUT AS DAMAGE CAN OCCUR DUE TO OVER VOLTAGE Using talkback with output channels assigned on the Mix Back a Label the remote to match master output channels such as drummer vocals etc b Connect a dynamic microphone to the talkback microphone input TALKBACK MIC c Now the director engi
16. ch permits the talkback microphone to route to all outputs at the same time This can be thought of as a broadcast to everyone connected to the Mix Back outputs Remote Control RJ45 Pin Outs Pin Function Digital Digital Ground 18 VDC No Connect Ground 18 VDC No Connect Relay Output 1 Normally Open Top Pin 2 Common Center Pin 3 Normally Closed Bottom Pin Mix Back User Guide hear 2 3 mix back remote SETTING UP FOR THE FIRST TIME INSTALLATION CAUTION Before you begin make sure your mixer is disconnected from the power source and all level controls are turned off Use an EIA 19 48 26 cm equipment rack or cabinet CONNECTING 1 Connect all inputs and label channels 2 Connect channel XLR outputs to the FOH mixer When using a line input it may be necessary to lift pin 1 on that channel to prevent ground loops 3 Set all gain pots to 12 o clock 4 Set all EQ gain settings to 0 5 Turn off all input level controls SETTING GAIN Set the gain of the input channels as follows 1 Input the maximum signal level microphone instrument signal etc Rotate gain control clockwise until the signal clip light just turns red then back off the gain until the clip light goes off You may have to reduce the gain if you boost tone settings NOTE mixing consoles h
17. ctric shock do not expose this apparatus to rain or moisture The apparatus shall be connected to a mains socket outlet with a protective earthing connection Mains plug is used as the disconnect device It shall remain readily operable and should not be obstructed during intended use WARNING To prevent injury this apparatus must be securely attached to a rack in accordance with the installation instructions Detailed installation instruction in user manual FRENCH Danger L exposition a des niveaux eleves de bruit peut provoquer une perte permanente de l audition Chaque organisme humain reagit differemment quant a la perte de l audition mais quasiment tout le monde subit une diminution de l acuite auditive lors d une exposition suffisamment longue au bruit intense Les autorites competentes en reglementation de bruit ont defini les expositions tolerees aux niveaux de bruits DURE EN HEURES PAR JOUR 8 6 4 3 2 1 NIVEAU SONORE CONTINU EN dB 90 93 95 97 100 103 Selon les autorites toute exposition dans les limites citees ci dessus peuvent provoquer certaines pertes d audition Des bouchons ou protections dans l appareil auditif ou sur l oreille doivent etre portes lors de l utilisation de ce systeme d amplification afin de prevenir le risque de perte permanente de l audition Dans le cas d expositions superieures aux limites precitees il est recommande afin de se premunir contre les expositions aux pressions acous
18. d breaking product which records eight tracks digitally on a standard 1 2 SVHS video cassette The ADAT has been arguably the most significant technology price breakthrough for recording studios in the last 20 years and has undoubtedly changed the face of modern recording forever The ADAT has gone through several generations and is currently a 24 bit digital format The ADAT optical connections for transferring digital data 8 tracks at a time have become a standard of the industry and used in a wide range of products from many manufacturers dB Equal to one tenth of a bel named after Alexander Graham Bell Since the Bel was a very large unit the Decibel first used in telephony in 1929 by W H Martin became the new name for the transmission unit where signal loss is a logarithmic function of the cable length This is still very much in use today The dB is the preferred method and term for representing the ratio of different audio levels Being a ratio decibels have no units Everything is relative Since it is relative then it must be relative to some 0 dB reference point To distinguish between reference points a suffix letter is added as follows a 0 dBu Preferred informal abbreviation for the official dB 0 775 V a voltage reference point equal to 0 775 Vrms 4 dBu Standard pro audio voltage reference level equal to 1 23 Vrms b 0 dBV Preferred informal abbreviation for the official dB 1 0 V a voltage refere
19. d in both ears but arriving at different times Due to the head s geometry the direct sound from any source first enters the ear closest to the source then the ear farthest away The Haas Effect tells us that humans localize a sound source based upon the first arriving sound if the subsequent arrivals are within 25 35 milliseconds The Haas Effect is named after Helmut Haas a distant relative of Scott Haas Limited Warranty Hear Technologies warrants the equipment against defects in materials and labor for a period of one year from the original date of purchase The duration of this warranty is limited to claims made to Hear Technologies within the periods stated with respect to parts and labor from the date of purchase During the warranty period defective equipment will be replaced or repaired to the general condition as received at the discretion of Hear Technologies All transportation is the responsibility of the purchaser or owner Equipment should be shipped in the original shipping box This warranty applies only to defects in materials and workmanship and does not cover failure or damage due to shipping loss or damage abuse misuse misapplication incorrect or varying power line voltages lack of proper maintenance natural disasters acts of God or unauthorized modifications repairs or any alterations The following are registered trademarks of Hear Technologies 13 Psycho acoustics The scientific study of sound perce
20. e Stereo 2 master buss Mono level 1 12 Adjusts level to mono master outputs 1 thru 12 7 Mix Back User Guide Gain control Four band EQ with dual sweepable mids Two stereo level and pan controls ST1 and ST2 Twelve mono level controls 1 12 Dual switch selectable effects sends front panel rear panel CH2 INSERT INSERT Line Input TRS Balanced Phantom Mic Power Switch 18 VDC powers most condensers Note Turn off the Mic power switch if you use FOH console or recording console phantom power Mic Input XLR Pin 2 Pin 1 Ground Lift For Output XLR Passive Split XLR Output 66 66 Channel Insert Tip Send Ring Return Sleeve Ground SHIELD MASTER SECTION FEATURES Two stereo and twelve mono TRS balanced analog outputs Sixteen channels of and HearBus output Switch selectable AFL meter headphone monitoring Two stereo TRS balanced effects returns assignable to both stereo masters Stereo Aux return assignable to both stereo busses for FOH or studio two mix Talkback is assignable to ST1 and ST2 mono 1 12 and COM outputs Talkback relay contacts activate when the talkback remote COM switch is pressed Optional talkback remote connects using a standard CAT5e cable Buss inputs permit linking mixers together front panel back MASTER
21. ed and cannot hear the impor tant direct and reflected ambient sounds experienced as with stage monitors or listening acoustically The perfect mix restores this valuable physco acoustic information to the performers We highly recommended a perfect mix for every performer using in ear systems to deliver the spatial information experienced while performing without in ear or headphone systems Even if you use a mono PA system such as a single point source cluster or simple mono PA system one should create a stereo FOH mix and send it to the monitoring system as the perfect mix We feel this is the best way to achieve a natural feel for the talent when using in ear systems 5 FX EFX Acronyms or slang used for effects unit Reverb delay etc are examples of such 6 TRS Balanced This refers to a connector type that carries a balanced plus and minus signal pair as well as an overall shield 7 Gain The amount of amplification voltage current or power of an audio signal usually expressed in units of dB While similar to level itis a more critical adjustment that insures maximum gain is reached without distortion and to reduce signal to noise ratio 23 Mix Back User Guide 10 Level This is also referred to as volume ADAT A registered trademark of the Alesis Corporation and taken from the acronym DAT ADAT Alesis Digital Audio Tape is the name Alesis chose in the early 1990 s for their groun
22. etween the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help 5 Mix Back User Guide ce o ao LISTED mix back mixer APPLICATIONS Monitor Mixer Front of House Mixer Recording Studio Cue Mixer Post Production Mixer Multi Zone Distributed Audio with Paging MIX BACK USED AS A STAND ALONE LIVE SYSTEM Stereo mix connected via stereo analog outputs Hear Back connected via sixteen channel HearBus outputs Recording connected via the sixteen channel ADAT outputs mix back UV LED lamp mix back remote optional When used in conjunction with Hear Back the talent has total control over cue or personal monitor mixes The Mix Back provides control for effects EQ and a stereo baseline perfect mix Combine all that with the talkback feature and you have a winning combination sure to bring smiles to the talent The built in talkback function permits the band director to talk specifically to each talent through the individual more me outputs as well as both stereo busses The optional talkback remote may be connected up to 500 feet from the Mixer using standard CAT5e cable The talkback remote COM balanced output acts as an intercom for communicating with the front of house engineer or
23. fety purpose of the polarized or grounding type plug polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet Protect the power cord being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Do not break the ground pin of the power supply cord Only use attachments specified by the manufacturer Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving cart apparatus combination to avoid injury from tip over Unplug this apparatus during lightning storms or when unused for long periods of time Care should be taken so that objects do not fall and liquids are not spilled into the unit through the ventilation ports or any other openings Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped WARNING To reduce the risk of fire or ele
24. ht Left 2 1 1 SPKR8 SPER8 connected for clarity 1 SPKR1 Mix Back User Guide 18 CONVENTIONAL MONITOR MIXING UP TO FOURTEEN MONITORS 1 Connect microphone or line inputs to the Mix Back input channels Adjust all input channels Mono Level 1 to the Master 1 output to obtain the mix for that monitor Repeat for all twelve mono Master outputs Pan all ST1 and ST2 pan controls full left or right and the ST1 or ST2 level controls to derive the two additional mono monitor mixes 2 Connect the mic outputs to the FOH board 3 Connect the Mix Back Master outputs to an equalizer and then the equalizer outputs to the power amps or powered monitors Mix Back Mixer TALKBACK MIC Talkback Mic MICi2 MICIL _ MIC6 CH 13 INSERT 15 INSERT CH 14 INSERT CH 12 INSERT CH 11 CH 10 INSERT CH9 INSERT CH7 CH INSERT INSERT INSERT TALKBACK REMOTE HearBus ADAT OUTPUTS LINE IN OUT BUSS INPUTS FX RETURN STIL mix back remote ST2L 5128 7 8 9 10 11 12 FX2L Talkback Remote FX SEND 3 4 5 6 FXi mix back HOOK UP DIAGRAM Optionally you may use ST1 and ST2 outputs to derive two stereo monitor mixes This op
25. is Steel Front Panel HearBus Output 24 Bit 44 1 KHz 48 KHz Selectable ADAT HearBus 1 Master 1 L R Channels 1 6 19 23 Hx 19 W x 5 35 D 488mm H x 482 6mm W x 135mm D Size with 1 handles ADAT HearBus 2 Analog Line Outputs Maximum Output Level 24 dBu TRS Balanced Master 2 L R Channels 7 12 Unit Weight 30 8 Ibs 14 kg Mounting Standard rack mount 11RU 10 55 H x 25 0 W x 24 53 D 268mm H x 635mm W x 623mm D Shipping Size Output Impedance 121 Q balanced Note 1 0 dBu 0 775 Vrms 2 Talkback relay 1 amp maximum Shipping Weight 42 9 Ib 19 5 kg Specifications and features subject to change without notice Mix Back User Guide 12 BLOCK 21 ONOW 21 ONOW ONOW ONOW OI ONOW 01 6 ONOW 60NOW 8 ONOW 8 ONOW 2 9 ONOW 9 ONOW G ONOW G ONOW NNNSN ONOW N ONOW I ONOW Wels Weis 1215 S one 1115 185 QNS 2X4 ___ ___ ____ QNS 2 4 QNS IX4 QNS IX4 a a E E si 9 M a ing 5 5 5
26. m c Connect Mix Back ADAT optical outputs to a digital recorder with ADAT inputs d Duplicate the stereo Perfect Mix on both Stereo 1 PA and Stereo 2 Hear Back as the base line mix for the Hear Back system s This permits the performers to hear the equivalent FOH mix as in the PA system e Adjust the Mix Back mono channel more me outputs mono 1 12 and send them to the appropriate more me Hear Back Hub inputs Example if Channel 1 of the Mix Back is the guitar player then adjust mono volume 1 to obtain the appropriate level turn all other Mono volumes off Doing this sends just the guitar to channel three on the Hear Back Hub NOTE Since Mix Back channels 1 amp 2 are the stereo mix perfect mix and are sent to the HUB channels 1 amp 2 then mono channels are skewed by two channels i e Mix Back channel one is channel three on the hub Mix Back channel two is channel four on the hub and so on IMPORTANT When using in ear monitors you need a baseline stereo mix to verify what the audience hears Always assign the stereo mix so it appears on every Hear Back Mixer stereo knob Channels 1 amp 2 A stereo mix is critical since ambience and physco acoustics are absent with in ears Hey in ears are earplugs If you are sending the perfect mix from a FOH console then plug that into the left right Aux inputs and assign them to the Hear Back output channels ST1 and ST2 NOTE Reverse the left and right cha
27. n d viter les dommages d un renversement D brancher cet appareil lors d orages ou s il n est pas utilis pendant une longue p riode Des pr cautions doivent tre prises afin qu aucun objet ne tombe et qu aucun liquide ne se r pande l int rieur de l appareil par les orifics de ventilation ou n importe quelle autre ouverture Pour toutes interventions techniques s adresser un technicien qualifi L intervention technique est n cessaire lorsque l appareil a t endommag de n importe quelle fa on comme par exemple si le cordon secteur ou sa fiche sont d t rior s si du liquide a coul ou si des objets sont tomb s l int rieur de l appareil si l appareil a t expos la pluie ou l humidit s il ne fonctionne pas normalement ou s il est tomb ATTENTION Pour r duire le risque d incendie ou de choc electrique ne pas exposer l appareil la pluie ou l humidit L appareil sera reli un socle principal d lectricit muni d une mise terre protectrice Le cordon d alimentation est utilis e comme dispositif de d branchement restera ais ment fonctionnelle et ne devrait pas tre obstru pendant l utilisation pr vue AVERTISSEMENT Pour raison de s curit cet appareil doit tre solidement fix un rack selon les instructions d installation Instruction d installation d taill e l int rieur du manuel d utilisateur Mix Back User Guide 2 5 01 03 04 05 07
28. n stage ever played in a gymnasium Elimination of sign language between stage and sound engineer no more semaphores Most importantly you get to Control Your Mix Mix Back and Hear Back Make It Easy With some monitor systems it is possible for the talent to create his or her own mix However there are two drawbacks of a musician mixing all of the individual mixes a They don t know what they sound like in the audience because their ears are plugged up with in ear monitors Do you care what you sound like to the audience b Players need to be playing not mixing With Hear Back it s as simple as turning up the perfect mix front of house recording studio two mix etc and adjusting your more input s Simply turn the knobs and smile EXAMPLE Your star vocalist should not waste time mastering an extensive system of switches dials displays and cables resembling the cockpit of a 747 They just need the perfect mix channels 1 amp 2 and their more input Now time and energy is where it should be performing We recommend you connect the perfect mix from the FOH console or studio two mix to the Mix Back stereo aux input When using in ear monitors the talent looses their psycho acoustic space because stage reflections are lost To cure this create a stereo mix as perceived on stage to help restore the natural feel When performing live the perfect mix lets you hear what the audience hears C
29. nLu FX RETURN 6 572 ST2R 7 8 9 10 1 12 FX2L FOR OUTPUTS FX SEND xi mix back ST2R 7 8 9 12 FX2 NO USER SERVICEABLE Hear Back Hub ADATIN HearBus N HearBus OUT MIXER OUTPUTS OFF ip watts ANALOG INPUTS dr hear back ADAT IN HearBus HearBus IN OUT Up to 8 Mixers MIXER OUTPUTS Mix Back User Guide Up to 8 Mixers DA 88 ANALOG CABLE ANALOG INPUTS DA 88 ANALOG CABLE hear back STUDIO l ToDAWor to recording Studio Preamps HOOK UP DIAGRAM TWENTY FOUR MORE ME CHANNELS USING TWO MIX BACKS AND FOUR HEAR BACK HUBS Mic Mix Back hear Talkback 5 Remote Stereo Mix from Console or 558 Studio Two Mix mu 7 Back Hub 1 Annos Mix Back Talkback Remote Hear Back Hub 3 ANALOG INPUTS LE Talkback hear back HUB ces hearback HUB Up to 8 Mixers hear mix back hear mix back
30. nce point equal to 1 0 Vrms c 10 dBV Standard voltage reference level for consumer and some pro audio and is typically equal to 0 316 Vrms d 0 dBm A power reference point equal to 1 milliwatt To convert into an equivalent voltage level one must specify impedance For example 0 dBm into 600 ohms gives an equivalent voltage level of 0 775 V or 0 dBu e 0 dB reference point for the threshold of hearing equal to 20 micro Pascals rms f dBA Popular way of stating loudness measure ments made using an A weighting curve Glossary Terms 11 Octave a In audio an octave is the interval between any two frequencies having a ratio of 2 to 1 Example 100 Hz and 200 Hz are an octave apart b In music an octave is the interval of eight diatonic degrees between two tones one of which has twice as many vibrations per second as the other Example and A2 on a piano are an octave apart Although similar to audio some instruments are not exactly two times the frequency due to what s know as stretched temperament In equal temperament the ratio of frequencies in a semitone is the twelfth root of two 2 2 Every interval is then simply a certain number of semitones Only the octave the twelfth power of the twelfth root is a pure interval 12 Haas Effect Also called the precedence effect describes the human psycho acoustic phenom ena of correctly identifying the direction of a Sound source hear
31. neer can speak to any dedicated more me output independently The balanced talkback output becomes active when pressing the COM switch on the remote This is very useful for communicating with a sound person or anyone off the stage that has the capabilities to hear the talkback via the balanced line output Examples choir rooms video rooms recording studios etc d Use the talkback COM relay to control light beacons or logic level controls using the relay contacts The relay is a single pole single throw relay Pin outs are NO Com NC Example Assume you have two Hear Back Hubs one for vocals and one for the band Let s also assume the Mix Back Stereo 1 outputs are connected to the Vocal Hub channels 1 amp 2 stereo mix and the Mix Back ST2 Stereo 2 outputs are connected in the same manner to channels 1 amp 2 of the band hub You can now use the ST1 or ST2 switches on the remote to address just the band or just the vocalist e The talkback ALL switch routes the talkback microphone to all outputs TALKBACK 5 REMOTE h STi ST2 COM ALL c cc 5 mix back remote Mix Back User Guide 10 USING BACK FOR HEAR AND RECORDING 1 Using the Mix Back Hear Back and ADAT equipped recorders at the same time see the hook up diagram on page 17 a Connect the Mix Back HearBus outputs to Hear Back Hub HearBus inputs b Connect Stereo Master 1 analog outputs to the PA syste
32. nettoyer ce produit 7 Ne bloqu r aucune ouverture de ventilation Ne pas placer le produit tout contre un mur ou dans une enceinte ferm e cela g nerait le flux d air n cessaire au refroidissement 10 11 13 14 15 16 17 18 19 20 pas placer le produit pr s de toute source de chaleur telle que radiateurs arriv es d air chaud fourneaux ou autres appareils g n rant de la chaleur incluant les amplificateurs producteurs de chaleur Ne pas n gliger la s curit que procure un branchement polaris ou avec raccordement la terre Un branchement polaris comprend deux fiches dont l une est plus large que l autre Un branchement la terre comprend deux fiches plus une troisi me reli e la terre Si la fiche secteur fournie ne s insert pas dans votre prise de courant consulter un lectricien afin de remplacer votre prise obsol te Prot ger le cordon d alimentation de tout crasement ou pincement particuli rement au niveau des fiches des r ceptacles utilis s et l endroit de sortie de l appareil Ne pas casser la fiche de terre du cordon d alimentation Utiliser uniquement les accessoires sp cifi s par le constructeur 12 Utiliser uniquement avec le chariot de transport le support le tr pied la console ou la table sp cifi s par le constructeur ou vendus avec l appareil Lors de l utilisation d un chariot bouger avec pr caution l ensemble chariot appareil afi
33. nnels so you have the correct stereo image on the stage You may feel a little strange if what you hear is a mirror image of what you see i e the guitar player is physically on your left but you hear him her in your right ear see physco acoustics in the glossary 11 Mix Back User Guide STUDIO CUE MIXING USING MIX BACK AND HEAR BACK 1 Connect the inputs to the Mix Back so as to set up an independent Cue Mix Use the passive splits to connect to your studio preamplifiers 2 Talkback remote connection Connect the remote control to the Mix Back using standard CAT5e cable The connection will work up to 500 feet or 152 4 meters CAUTION NEVER PLUG THE MIX BACK REMOTE INTO A HEARBUS OR HEAR BACK MIXER CONNECTION BECAUSE AN OVER VOLTAGE DAMAGE CAN OCCUR 3 Using the talkback after channels have been assigned on the Mix Back Hear Back a Label the Mix Back remote to correspond to the Hear Back channel assignments b Now you have the option to speak only to the drummer assuming only his her more is turned up This applies to all more me channels c The talkback feature has a balanced output that becomes active when pressing the COM switch on the remote Use the talkback output as a slate function if desired Simply connect the balanced talkback out to your recording device The COM switch also energizes the intercom relay d The ALL broadcast switch routes the talkback mic to all outputs
34. onnect an ambient microphone to a Mix Back input located near the band front line so the talent can hear the audience Locating the mic far away adds an unnatural delay Sound travels at roughly one foot per millisecond so a mic placed 100 feet into the audience has a 100 mSec delay It is often necessary to add a limiter to the ambient mic channel to prevent excessive ambient signal into the monitor mix Mix Back User Guide 4 Thank you for purchasing the Technologies Mix Back MIX BACK MIXER DESCRIPTION Mix Back is a flexible 16 x 12 x 2 x 2 monitor mixer Featuring two stereo and twelve mono busses it s a perfect companion for Hear Back as well as conventional monitoring systems and wireless in ear systems Mix Back is equally at home as a stand alone mains and monitor mixer Each channel features a signal clip LED Gain control 100 Hz hi pass filter four band EQ switch selectable dual effects sends two stereo volume and pan controls and twelve mono volume controls The master section features AFL After Fade Listen meter headphone selection stereo auxiliary input and two effects returns A built in talkback mic preamp permits talking to any or all of the master outputs as well as a balanced output using the optional sixteen button talkback remote The sixteen master outputs are available as balanced TRS analog ADAT and HearBus Statement ADVANTAGES FEATURES Independen
35. ophone signal to all master outputs and to the balanced talkback output COM It features a built in threaded Mic adapter for easy attachment to microphone and music stands using our MSA adapter or may be directly mounted to a mic stand The remote connects to the Mix Back using standard CAT5e cable MICROPHONE STAND ADAPTER The MSA Mic Stand Adapter is for mounting the Hear Back Mixer or a Mix Back talkback remote control to the side of any mic stand or standard music stand The perfect companion to the Hear Back Mixer and the Mix Back talkback remote control 21 Mix Back User Guide hear 2 3 FS mix back remote Mix Back Talkback Remote Mic Stand Adapter OTHER HEAR TECHNOLOGIES PRODUCTS HEAR BACK PERSONAL MONITOR MIXER SYSTEM Hear Back Personal Monitor Mixer System changes the way monitor mixing is accomplished on stage or auditorium as well as in the studio With Hear Back you get your mix exactly the way you want it the first time This affordable system is perfect for headphones wired and wireless in ear monitors and or conventional floor monitors basic Hear Back system consists of a Hub and personal Mixers connected using standard cables single Hub supplies signal and power to maximum of eight Mixers The Hubs can be daisy chained using the HearBus In and Out for virtually unlimited system size The Hear Back Hub can accept analog input signals from audio mixers
36. ption The effect experienced when a singer player hears sounds and sound reflections around them while performing 14 In ear monitors A variety of devices that are similar to headphones that fit inside one s ears There are many manufacturers and varying levels of quality for these devices Popular in the professional musician arena are the custom ear molds for in ear devices Generally in ear custom molds are made by an audiologist and insure a comfortable and perfect fit 15 Cue Mix A term generally used to describe audio sent to the talent headphones in recording studios see perfect mix 16 Talk Back A feature used in the recording industry that permits the recording engineer to talk to the talent in the studio 17 EQ An acronym frequently used to refer to equalization or tone controls done without the expressed written consent by Hear Technologies Hear Technologies shall not be liable for any loss of use of the equipment or consequential damages including damages to other parts of the installation in which the equipment is a part Hear Technologies does not make any warranty express or implied other than the warranty contained herein No agent representative or employee has the authority to increase or alter the liability obligations and terms of this warranty or sale of the equipment NOTE It is strongly recommended that any equipment returned to Hear Technologies be properly packaged and insured for its f
37. t Monitor control Frees front of house and recording console I O for other duties High quality Mic preamplifiers Four band EQ with quasi parametric sweepable mid controls Very low distortion Built in talkback feature controllable only with optional remote control Buss inputs permit linking mixers together Stereo Aux input assignable to ST1 and ST2 Dual effects send return Switch selectable AFL meter headphone monitoring Analog ADAT and HearBus outputs Glow in the dark knob pointers and silkscreen e UV LED Lamp included Rack Mountable 1180 Note This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation b
38. tion yields twelve mono mixes and two stereo mixes _ Mic In 9 amp T 41 CH3 CH2 CH1 ae INSERT INSERT INSERT 3 Right 2 Right Left Right Left Right 14 18 12 11 8 Right Left 4 3 EQ EQ clarity R Out L Out M ted for m Out Left 1 EQ Equalizer Powered Monitors 19 Mix Back User Guide Powered Monitors CONNECTORS LINE INPUT OUTPUT CONNECTORS TRS Balanced Tip Signal Ring Signal Sleeve Shield CHANNEL INSERT CONNECTORS TRS Tip Send Ring Return Sleeve Ground XLR FEMALE CONNECTORS 1 Shield 2 Mic 3 Mic XLR MALE CONNECTORS 1 Shield 2 Mic 3 Mic ZR HearBus RJ45 Pin Outs Pin Function Digital Audio Digital Audio Ground 18 VDC 18 VDC Ground 18 VDC 18 VDC BR D Remote Control RJ45 Pin Outs Pin Function Digital Digital Ground 18 VDC No Connect Ground 18 VDC No Connect D TALKBACK RELAY OUTPUT 1 Normally Open Top Pin 2 Common Center Pin 3 Normally Closed Bottom Pin Mix Back User Guide BACK SYSTEM ACCESSORIES MIX BACK TALKBACK REMOTE CONTROL The Mix Back Remote Control is a sixteen button remote that routes the talkback micr
39. tiques elevees potentiellement dangeureuses aux personnes exposees aux equipements capables de delivrer de telles puissances tels ce systeme d amplification en fonctionnement de proteger l appareil auditif ATTENTION DE LIMITER LE RISQUE DE ELECTRIQUE NE PAS ENLEVER LE CHASSIS NE CONTIENT PAS DE PIECES POUVANT ETRE REPAREE PAR L UTILISATEUR CONFIER LE SERVICE APRES VENTE AUX REPARATEURS ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR SYMBOLE POUR BUT D AVERTIR L UTILISATEUR DE LA PRESENCE DE VOLTAGE DANGEREUX NON ISOLE A L INTERIEUR DE CE PRODUIT QUI PEUT ETRE DE PUISSANCE SUFFISAMMENT IMPORTANTE POUR PROVOQUER UN CHOC ELECTRIQUE AUX PERSONNES CE SYMBOLE A POUR BUT D AVERTIR L UTILISATEUR DE LA PRESENCE D INSTRUCTIONS D UTILISATION ET DE MAINTENANCE DANS LES DOCUMENTS FOURNIS AVEC CE PRODUIT IMPORTANTES INSTRUCTIONS DE SECURITE Lire avec attention toutes les recommandations et pr cautions d emploi avant d utiliser ce produit 2 Toutes les recommandations et pr cautions d emploi doivent tre conserv es afin de pouvoir s y reporter si n cessaire 3 Lire et comprendre tous les avertissements num r s dans les pr cautions d emploi 4 Suivre toutes les pr cautions d emploi pour utiliser ce produit 5 Ce produit ne doit pas tre utilis pr s d eau comme par exemple baignoires viers piscine sous sol humides etc Utiliser exclusivement un chiffon sec pour
40. to the talent when used in a studio The remote COM button also activates a relay for lighting beacons or virtually any function needing a set of dry contacts Mix Back User Guide 6 EACH INPUT CHANNEL FEATURES oo OO High quality Mic Line inputs Passive XLR split with Pin 1 lift Phantom Mic power switch Channel insert Signal Clip LED indicator 100 Hz high pass filter Hi Pass filter Use to eliminate low frequency stage rumble and wind noise in microphones Use whenever possible to prevent excessive low energy build up in the mixer busses Signal Clip LED This indicator is post EQ pre volume Preamp Gain Control HF Hi Frequency 10 KHz shelving EQ 15 dB gain cut boost HM Hi Mid Frequency Adjustable from 500 Hz to 15 000 Hz HM Gain control 15 dB cut boost LM Lo Mid Frequency Adjustable from 50 Hz to 3 000 Hz LM Gain control 15 dB cut boost LF Lo Frequency 100 Hz shelving 15 dB cut boost It is wise to cut undesirable frequencies rather than boost desired frequencies because it causes less ringing associated with analog EQ FX Level Adjusts the effects send level FX Select Selects effects send 1 or 2 ST1 Stereo 1 Pan Use to pan input to the desired stereo position ST1 Stereo 1 Level Adjusts level to the Stereo 1 master buss ST2 Stereo 2 Pan Use to pan input to the desired stereo position ST2 Stereo 2 Level Adjusts level to th
41. ull value in case of loss handling or shipping damage Hear Technologies shall not be responsible for damage or loss of equipment during shipment Hear Technologies Hear Back Control Your Mix Talk Back Extreme Extender Hearbuds HearBus and the Jack logo All names and marks of other companies belong to those respective companies Mix Back User Guide 24 NOTES 25 Mix Back User Guide DL 5 gt gt 3 pib e A 27 Pje Pje D d D D oe gt gt gt gt OX HEAR TECHNOLOGIES 991Discovery Drive Huntsville AL 35806 Phone 1 256 822 1200 Fax 1 256 922 1221 www HearTechnologies com 3 G E 3 Part No LIT002720UG 5 LT 2005 Hear Technologies 02 2006
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