EQ300 Series Graphic Equalizers
Contents
1. www EE 648 1248 BYPASS CUP 2 LN CHANNEL TWO EQ341 DUAL HANNEL 15 BAND 2 3 OCTAVE EQUALIZER EQ351 SINGLE CHANNEL 31 BAND 1 3 OCTAVE EQUALIZER EQ355 DUAL CHANNEL 31 BAND 1 3 OCTAVE EQUALIZER USER S GUIDE R T APPLIED RESEARCH AND TECHNOLOGY IMPORTANT SAFETY INSTRUCTIONS READ FIRST CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR This symbol wherever it appears This symbol wherever it appears alerts you alerts you to the presence of uninsulated to important operating and maintenance dangerous voltages inside the enclosure that instructions in the accompanying literature may be sufficient to constitute a risk of shock Please read the manual Read instructions Retain these safety and operating instructions for future reference Heed all warnings printed here and on the equipment Follow the operating instructions printed in this user guide Do not open There are no user serviceable parts inside Refer any service work to qualified technical personnel only Power sources Only connect the unit to mains power of the type described in this user guide or marked on the rear panel The power source must provide a good ground connection Power cord Use the power cord with sealed mains plug appropriate for your local main supply as provided with the equipment If the provided plug doe2. Range Overall Gain Range INPUTS Type Connectors Impedance Maximum Level OUTPUTS Type Connectors Impedance Maximum Level Passive Bypass Switches Overload LED Threshold High Pass Filter EQ351 EQ355 Low Pass Filter EQ351 EQ355 Frequency Response THD Noise Signal to Noise Ratio Channel Separation POWER switchable POWER CONSUMPTION SIZE WEIGHT 2 x 15 2 8 octave ISO spacing EQ341 1 x 31 1 3 octave ISO spacing EQ351 2 x 81 1 8 octave ISO spacing EQ355 Constant Q 396 center frequency 20mm w positive center detent 6dB or 12dB selectable Off to 6dB unbalanced out sliders centered Off to 12dB balanced out sliders centered Active balanced unbalanced 3 Pin XLR 1 4 TRS balanced RCA unbalanced 20k Ohms balanced 15k Ohms unbalanced 22dBm level control at center Active balanced unbalanced 3 Pin XLR 1 4 TRS balanced RCA unbalanced 150 Ohms typical 18dBm balanced 600 Ohm load 22dBm unbalanced 2k Ohm load Yes 6 dB below clipping all filters set to flat 10 250Hz 12dB octave 3k 40kHz 12dB octave 20 20kHz 0 5dB 0196 94dB gt 50dB 95 130VAC 50 60Hz 190 250VAC 50Hz 12 Watts 1 75 H 19 W 7 D 1U EQ351 and EQ341 4 45cm 48 3cm 17 8cm 3 5 H 19 W 7 D 20 EQ355 8 9cm 48 3cm 17 8cm 7 1 lbs 3 2kg EQ351 and EQ341 11 6 lbs 5 2 kg EQ355 15 A APPLIED RESEARCH AND TECHNOLOG
3. bypass switch clip level indicator ground lift switch and selectable line voltage Rugged construction and solid audio performance make these equalizers particularly well suited to fixed installation as well as touring live sound systems INSTALLATION This series of equalizers are designed for mounting in a standard 19 equipment rack or one of the many rack type portable cases available on the market The vertical height is 1 75 inches for the EQ351 and EQ341 and 3 5 inches for the EQ355 The depth is 7 inches exclusive of the power cord POWER CONNECTORS These equalizers have internal power supplies and are designed for operation with 120 or 240 volt as determined by the rear panel line voltage switch 50 60Hz mains supply In new installations and portable sound systems or any situation where the mains power is in question it is wise to confirm the voltage and select the appropriate line voltage setting BEFORE connecting the equalizer to power sources INPUT OUTPUT CONNECTIONS The EQ300 series graphic equalizers have three sets of input and output connectors wired in parallel 1 4 phone XLR and RCA connectors Only one of the three inputs should be used per channel Any combination of output connectors may be used 1 4 phone jack connections may be used balanced or unbalanced When balanced the tip is High the ring is Low and the sleeve is Ground To use unbalanced use a mono 1 4 phone cable which will automatica
4. to 250Hz by turning this knob Because of its high roll off slope the HPF can be efficiently used to cut down hum and low frequency noise from preceding instruments or to reduce low frequency resonances when speakers are installed in an enclosed acoustic environment It is also very effective at removing power robbing and potentially destructive rumble LOW PASS FILTER HIGH CUT FREQUENCY CONTROL EQ351 and EQ355 only To cut down on unwanted high frequency signals this control determines the roll off frequency of the Low Pass Filter LPF The roll off frequency can be adjusted from 3kHz to 40kHz by turning the knob Because of its high roll off slope the LPF can be effectively used to cut down the high frequency noise from preceding instruments or roll off excessive high frequency sounds to obtain a more natural sound in some acoustic situations LEVEL CONTROL This controls the output signal level from the equalizer Turn this control down if the CLIP LED illuminates steadily meaning too strong an input signal Unity gain can be set by adjusting this knob so that as you toggle the BYPASS switch the overall level sounds the same Signal levels should be kept normalized through the equalizer That is the signal level when bypassed should be the same or a little lower than when active REAR PANEL CONNECTORS amp CONTROLS AC INPUT 50 60Hz POWER CORD This cord is used to connect the AC power source to your equalizer CAUT
5. 200 250 400 500 430 800 2 100 125K MK OK MRZEL EEE EEE EFF FK P mit RANGE BYPASS Y u a o ML RL R R R R R m hR R MN MW MW M femen anual od ool od jeme nd d rd d d d d d d d od d 648 1248 BYPASS CUP 2111 RRR F F F F R s EQ355 Hi PASS LOW PASS l PO A RT p 40 50 43 19 125 140 200 250 400 500 430 800 SK 14K 25K IIK 63K TOK 125K 5 11 IER IER IER ed d RANGE BYPASS DS on nn nn JJ JJ JJ 1 si Ww WM MW MW Ww w rome IE IEIEIEIEEEEIEIEIEIBEEIEAEIEIEIEIEIEIEIEIEIImBgISIEIEDN ZIEIIE 648 1248 BYPASS CUP 2 ON 2 HIPASS LOW PASS LEVEL CHANNEL TWO To turn the equalizer on or off press the upper or lower portion of the POWER switch CAUTION Always turn on your equalizer BEFORE your power amplifiers are turned on and always turn off your equal
6. EQ300 Series Graphic Equalizers G 40 43 100 250 400 430 25K amp WK 4 10 16 6x0 29K 63K 10K a SS A kz 41 RANGE BYPASS RANGE BYPASS o B BR BE R E R E R R R R R BR BR B M M M M m EE RS Ze t test O U AZ _ ZE E E E EEE FE FERRE ESPERE VERNIS CHANNEL ONE CHANNEL TWO LEVEL B 20 s 200 40 500 430 800 125K 25K ek 20K e M E E EJ EE EEE Hu Eu Iu EEE EE EQ351 RANGE BYPASS on nn ne nn nn nn nn nn nn IR CIR v m mW W mM m M M M M m m w LASKA E i aa S SSS SSS au a en PASS LOWPASS LEVEL a 10 40 200 250 400 500 430 00 AK Lg MK 125K MK ara j a 2 O 2 J J n OP RANGE BYPASS i m RS AAA 1 all E E EEC EE EEE EEE EE EE E EE 2 2648 41248 BYPASS CLIP 2x EQ355 Pus LOWPASS CHANNEL ONE TRES 50 s 100 125 4 200 2 400 500 60 800 IK 14K 2K 25K 21K K 10 125K 14K P EE E E E E FEE EEE ao RANGE JEN a BPA
7. ION Equipment for USA installation includes a power cord with a three pin polarized plug DO NOT REMOVE THE CENTER GROUNDING PIN FUSE HOLDER LINE VOLTAGE SWITCH amp GROUNDING SCREW This fuse holder contains the AC primary fuse This fuse should be replaced with the same type fuse if itis blown If they continuously blow stop replacing fuses and refer servicing to qualified personnel CAUTION After checking the AC supply voltage be sure that the correct fuse is in the fuse holder 0 5Amp 500mA for 95 125VAC as well as for 220 240VAC When changing the fuse make sure that the holder is seated securely The position of the line voltage switch determines the line voltage range and is labeled on the switch GROUND LIFT SWITCH GND LIFT This switch is used to disconnect signal ground from the mains and chassis earth ground You may set the switch to the LIFT position if Hum caused by a ground loop can be heard at the speakers INPUT OUTPUT CONNECTORS pF UNBAL4 CHANNEL 2 CHANNEL 1 IN le le IN OUTPUT OUTPUT I OUT 6 I Lunga RE O oo m EC T EQ341 OUTPUT Q OUTPUT UNBALANCED o CHANNEL 1 INPUT OUTPUT UNBALANCED INPUT OUTPUT CHANNEL 2 OUTPUT BALANCED EC 5 UNBALANCED EQ355 10 1 4 TRS Phone Jacks The TRS Tip Ring Sleeve connectors are balanced and wired as Tip High Ring Low and Sleeve Grou
8. ITES A 9 INPUT OUTPUT CONNEGTORS een an 10 APPLICATIONS eor edet bed D toten usc 12 WARRANTY INFORMATION auditus os b ta apa ia oett 13 Limited Warranty itt en tee nece ere tex eco cd e tene ec ies entres 13 EXGIDUSIOTIS neatis fecic dob dan se Ld bue o rage 13 SERVICE ucc uet O ll Te 14 SPECIFICATIONS en nn 15 OVERVIEW The ART EQ300 Series of graphic equalizers have been designed and engineered to extremely high standards for audio performance and functionality These innovative high quality equalizers are perfect for virtually any audio application where precision frequency tailoring reliable performance rugged design and extremely silent processing is important Active Filter Sections The EQ300 Series of graphic equalizers feature active filter sections which incorporate a constant Q design This constant Q design with accurate precision center frequencies ensures that the bandwidth of every individual filter will be narrow enough to prevent unnecessary interaction between filters yet still create an equalization curve wide enough to produce the exact and precise processing of audio frequencies the user seeks Precision Slide Potentiometers The 00 Series of graphic equalizers utilize 20mm precision slide potentiometers These center detented precision faders are gra
9. LIP LED is on reduce your signal to the unit Unselect the BYPASS switch Note The red LED is off If the CLIP LED is on turn down the Output LEVEL control You may now start equalizing your system E Ni e If you do not have enough equalization control switch the range switch to the 12dB setting OPERATION 25 40 10 140 2 400 430 AK 15K 63K 40 63 19 19 250 620 25K 4K amp 10K 12 p p TT 2 mm es ma ff ee i i TIirmirmimimirmirmirmimimi EVE ELE I RANGE BYPASS 1 nn non o TE TA nn USER Sn AA I P 5 5 eee A EU EE ex Si ii R ses ps AHA z dum ar o CHANNEL ONE CHANNEL TWO LEVEL 2 25 40 9 100 200 250 400 500 SK 2K 25K ISK AK SK amp BK 10K 125K 16K 20K e M E E E E EEE EEE IE E E E EQ351 4 O omaa aa M m m A T c Wm w m m m m M w w w pet zzz m E 5 SE ESS HH aue NC POWER HIPASS LOW PASS LEVEL 2 4 10 Mo
10. Y www artproaudio com E mail cserve artproaudio com 2010 Applied Research amp Technology EQ341 EG351 E355 V1 0
11. ce with the following warrants Applied Research and Technology ART warrants to the original purchaser that this product and the components thereof will be free from defects in workmanship and materials for a period of three years from the date of purchase Applied Research and Technology will without charge repair or replace at its option defective product or component parts upon prepaid delivery to the factory service department or authorized service center accompanied by proof of purchase date in the form of a valid sales receipt Exclusions This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs This warranty is void if the serial number is altered defaced or removed ART reserves the right to make changes in design or make additions to or improvements upon this product without any obligation to install the same on products previously manufactured ART shall not be liable for any consequential damages including without limitation damages resulting from loss of use Some states do not allow limitations of incidental or consequential damages so the above limitation or exclusion may not apply to you This warranty gives you specific rights and you may have other rights which vary from state to state For units purchased outside the United States an authorized distributor of Applied Research and Technology will provide service 13 SERVICE The follow
12. ing information is provided in the unlikely event that your unit requires service 1 Be sure that the unit is the cause of the problem Check to make sure that the unit has power supplied that all cables are connected correctly and that the cables themselves are in working condition You may want to consult with your dealer for assistance in troubleshooting or testing your particular configuration If you believe that the ART unit is at fault go to www artproaudio com You may contact Customer Service for more assistance or directly request a Return Authorization for service in the resources area of the website If you are returning the unit for service pack the unit in its original carton or a reasonable substitute The original packaging may not be suitable as a shipping carton so consider putting the packaged unit in another box for shipping Print the RA number clearly on the outside of the shipping box Print your return shipping address on the outside of the box Include with your unit a note with the RA number and your contact information including a return shipping address we cannot ship to a P O box and a daytime phone number and a description of the problem preferably attached to the top of the unit Also include a copy of your purchase receipt Fill in the following information for your reference Date of purchase Purchased from Serial number 14 SPECIFICATIONS EQUALIZER Bands Type Accuracy Travel
13. izer AFTER your power amplifiers have been turned off FILTER LEVEL CONTROLS Each of these sliders controls the signal level of each of the 31 or 15 bandpass filters A detent at the center position helps center the controls for a flat response FILTER RANGE SWITCH amp INDICATORS The gain range of the filter sliders is switchable as a group from 6dB to 12dB for maximum boost cut capability At 6dB the green LED will illuminate and at 12dB the yellow LED will illuminate BYPASS SWITCH amp CLIP INDICATOR LED When the red BYPASS LED is illuminated this indicates that the unit or channel is in the bypass mode Signal is routed directly from the input to the output without passing through any circuitry often referred to as hard wire bypass Use this switch to compare equalized and unequalized material or to bypass the EQ section in the event of total unit failure The red CLIP LED illuminates if any section of the equalizer is near clipping Occasional flickering of this LED is acceptable but if it remains on more than intermittently you should reduce the output level of the preceding equipment or if that is not possible turn down the equalizer s LEVEL control to avoid audible distortion HI PASS FILTER LOW CUT FREQUENCY CONTROL EQ351 and EQ355 only To cut down on unwanted low frequency signals this control determines the roll off frequency of the Hi Pass Filter HPF The roll off frequency can be adjusted from 10Hz
14. ll the unit in accordance with the instruction printed in the user guide IMPORTANT SAFETY INSTRUCTIONS READ FIRST 2 OVERVIEW Som de a Nt 4 GENERAL INFORMATION tdi ono dd da ko dates eas 5 INSTALLATIONS ated M Re MR I M AV I 5 POWER CONNECTORS nd P RI t a err A ee ue a ec K ea 5 INPUT OUTPUT CONNECTIONS ss N oad testae 5 SIGNALE LEVELS rss t OH teat ue Mec EN IE AIL nn tr 5 CHASSIS GROUNDING Haus as Gti tete nami parui fed cce 6 INFTIALSETUPR TS 6 OPERATION antena a a 7 FRONT PANEL CONTROLS 7 POWER SVG m a a 7 FILTER LEVEL CONTROLS t te E E EE E A E 7 FILTER RANGE SWITCH S INDIOATOFRS ortho nde 7 BYPASS SWITCH CLIP INDICATOR LED SES etat ko 7 HI PASS FILTER LOW CUT FREQUENCY CONTROL EQ351 and 55 only 8 LOW PASS FILTER HIGH CUT FREQUENCY CONTROL EQ351 and EQ355 only 8 LEVEL CONTROL E 8 REAR PANEL CONNECTORS 8 CONTROLS 9 POWER CORD eco tite manete LA dto e 9 FUSE HOLDER LINE VOLTAGE SWITCH 8 GROUNDING 9 GROUND LIFT S
15. lly ground the ring to the sleeve XLR connections are balanced where pin 2 is High pin 3 is Low and pin 1 is Ground RCA jack connections are unbalanced SIGNAL LEVELS Signal levels from 10dBm to 4dBm are considered normal with maximum levels of approximately 18dBm balanced or 22dBm unbalanced Do not connect microphones directly to the equalizer Most microphones as well as instrument pickups require a preamp to get the signal level up to a line level The outputs of the equalizer are also designed to connect into line level inputs and should not be connected into sensitive microphone or instrument Inputs for best results CHASSIS GROUNDING The equalizers are equipped with a rear panel grounding screw and Ground Lift switch The Ground Lift switch should normally be set to the GND position After set up if your system exhibits excessive hum or buzzing the problem may be a due to a ground differential between your equalizer and other equipment in the same system The Ground Lift switch lets you try several combinations to minimize system hum NOTE ALWAYS TURN YOUR AMPLIFIERS DOWN BEFORE CHANGING GROUNDS Try different combinations of lifting grounds on units that are supplied with ground lift switches or make sure all chassis are connected to earth ground either through the AC Power cord grounds or by the rear panel grounding screws If the EQ300 series equalizer is mounted in a grounded rack of equipment the ground t
16. nclude XLR connectors 1 4 phone jacks and RCA phono jacks Durability by Design The EQ300 Series of graphic equalizers are designed and engineered to be durable and rugged They are an ideal choice when the need for a robust equalizer is of paramount concern They are designed for mounting in a standard 19 equipment rack or one of the many rack type portable cases in existence The vertical height is 1 75 inches for the EQ341 and EQ351 and 3 5 inches for the EQ355 The depth is 7 inches exclusive of power cord Rugged construction and solid audio performance make these equalizers particularly well suited to fixed installation as well as touring live sound systems Precision and Quality When considering quality equalization the ART EQ300 Series of graphic equalizers are an excellent choice They deliver extremely precise powerfully flexible and simply great sounding equalization with the quality features and reliable design necessary for top level audio performance GENERAL INFORMATION Your ART equalizer is a professional quality unit perfect for virtually any audio application where frequency tailoring is needed It s features include constant Q circuitry with accurate center frequencies selectable 6dB or 12dB range active balanced and unbalanced input and output connectors RFI filters independent variable Hi Pass low cut and Low Pass high cut filters for the EQ351 and EQ355 variable input level control passive
17. nd For balanced connections using 1 4 TRS phone plugs wire them as follows tip High ring E Low sleeve Ground For unbalanced connections using 1 4 TRS or mono tip sleeve phone plugs wire them as follows tip High ring no connection sleeve Ground XLR Connectors The XLR input connectors are balanced and wired as Pin 2 High Pin 3 Low and Pin 1 Ground RCA Jacks The RCA jacks are unbalanced with the pin High and the outside Low APPLICATIONS Graphic equalizers may be used wherever modification of the frequency contour of a sound system is needed A graphic equalizer is a solution to any number of sound problems or creative urges Typical reinforcement application of Equalizaton of audio signals from a a two channel equalizer mixer Return P Amp Speaker Mixer EQ P Amp Speaker Mixer EQ Send Equalization of a musical instrument Equalization of an effects loop Instrument Amp Amp PreAmp EQ Stereo Am Effects loop EQ Amp WARRANTY INFORMATION Limited Warranty Applied Research and Technology will provide warranty and service for this unit in accordan
18. o the ground ing screw of the equalizer may be lifted to prevent multiple ground paths which may cause a ground loop to occur INITIAL SETUP Before starting to equalize your sound system there is some information you should know and procedures you should follow Your equalizer is equipped with a bypass switch The BYPASS switch when activated lights the bypass LED and cancels all equalization settings while allowing signal to flow directly through the unit at unity gain Also included is a RANGE selection switch with LED indicators 6dB green 12dB yellow This switch changes how much effect the slide controls have In addition to the RANGE selection switch there is an output LEVEL control potentiometer The LEVEL control operates between off and 6dB Note If there is too much gain your equalizer has a red LED CLIP indicator that illuminates when signals are within 6dB of clipping If the CLIP LED flashes occasionally this is okay but if this LED is on steadily you should reduce the level control Here are some tips to help you with the initial set up Set channel output LEVELS to the center detent 0dB on the front panel Select the BYPASS switch to bypass the equalizer Note The red LED is on Set the frequency slide controls to the center detent OdB If applicable set the HI PASS filter to 10Hz and the LOW PASS filter to 40kHz Select the 6dB RANGE Note The green LED is on Apply a signal to the system and if the C
19. phically positioned on ISO center frequencies between 25Hz 16kHz for the EQ341 20Hz to 20kHz for the EQ351 and EQ355 Independent Variable Hi and Low Pass Filtering In order to deliver superlative performance and control the EQ351 and EQ355 graphic equalizers incorporate independent variable Hi Pass low cut and Low Pass high cut filters Having separate and variable precision control for both the Hi Pass and Low Pass filters allows the user to custom tailor the audio signal to perfection Many competing products only feature shelving switches which have a fixed frequency point Others do not have separate filtering for both high and low frequencies These designs do not offer the precision or control of the ART EQ300 Series Additional Controls and Indicators The EQ300 Series of graphic equalizers utilize a variable output level control clip level indicator ground lift switch and selectable line voltage Additional features include selectable scale switching high slider resolution 12dB or normal resolution 6dB active balanced and unbalanced input output connectors and RFI filtering A passive bypass switch allows for direct comparison between the equalized and non equalized signal for each channel Multiple Connectivity The EQ300 Series of graphic equalizers can be connected with a wide variety of audio devices Each unit has three sets of input and output connectors wired in parallel These connections i
20. s not fit into you outlet consult your service agent Route the power cord so that it is not likely to be walked on stretched or pinched by items placed upon or against Grounding Do not defeat the grounding and polarization means of the power cord plug Do not remove or tamper with the ground connection on the power cord Moisture To reduce the risk of fire or electrical shock do not expose the unit to rain moisture or use in damp or wet conditions Do not place container of liquid on it which may spill into any openings Heat Do not locate the unit in a place close to excessive heat or direct sunlight as this could be a fire hazard Locate the unit away from any equipment which produces heat such as power supplies power amplifiers and heaters Environment Protect from excessive dirt dust heat and vibration when operating and storing Avoid tobacco ash drink spillage and smoke especially that associated with smoke machines Handling Protect the controls from damage during transit Use adequate padding if you need to ship the unit To avoid injury to yourself or damage to the equipment take care when lifting moving or carrying the unit Servicing Switch off the equipment and unplug the power cord immediately if it is exposed to moisture spilled liquid or the power cord or plug becomes damaged during a lightning storm or if smoke odor or noise is noted Refer servicing to qualified technical personnel only Installation Insta
Download Pdf Manuals
Related Search