8 Channel Headphone Amplifier
Contents
1. your ears especially when monitoring with headphones Panel Connections Controls amp Indicators 2 olo etele e o e 9 e2 e2 5 5 Cad 5 Ore en FRONT PANEL 1 STEREO TRS HEADPHONE OUTPUT JACKS There are eight stereo headphone outputs located on the front panel All eight outputs can be used simultaneously in a number of configurations detailed below 2 VOLUME CONTROLS Each output channel features a rotary volume pot for variable adjustment of the desired output level 3 POWER SWITCH WITH LED INDICATOR This LED indicator illuminates when the unit is powered on by the front panel power switch The power on LED will illuminate when the power is ON Before turning on this unit verify connection to the proper voltage AC source check all connections and turn down the level controls of equipment connected to the outputs REAR PANEL 4 BALANCED LINE INPUTS There are 3 sets of balanced line stereo inputs These are labeled A B and C 5 MONO STEREO SWITCHES Each set of inputs has a Mono Stereo pushbutton select switch Note that the L Mono input should be used in Mono Mode 6 AC VOLTAGE SELECTOR SWITCH Before plugging in the power cord check to see that the unit is set for the proper voltage for your area 115v 60Hz or 230V 50Hz Note use at the improper voltage can damage your unit and void the warranty 7 POWER CONNECTOR WITH FUSE HOLDER Stand2. Owner s Manual je 10 ipa 9 vd of Ce oL gt 2 oL oL a pi AnNa a 6 gt With extensive routing options extreme efficiency and unmatched sound quality the ultra versatile HPA 8 is a universal 8 channel multi purpose headphone amplifier perfect for the most demanding professional stage and studio applications Congratulations on your choice of headphone amplifier you have purchased one of the finest stereo headphone amplifiers on the market today This unit was 8 stereo headphone channels in a convenient single rack package enables multiple signal distribution options for monitoring flexibility e Each channel has separate volume control and stereo outputs e Over 100mW of power per channel with full spectrum audio response and maximum headroom even at high volume headphone levels e No compromise circuit design SMD technology and low noise op amps for reference quality transparent Contents FO 6200 r aE aai Warming eisai he hae iia E E WS tallatiOn ose ese2 2ccacceeds ses ceresecsssvigdaeeacsvetsdeneseeeadeceeresesaugieendas veeeets Panel Connections Controls and Indicators 00000000000110 0 7 SpPeCifiCAtioNnSs 0 developed using the expertise of professional sound engineers and working musicians You will find that your new NADY AUDIO HPA 8 has superior performance and greater flexibility than any oth
3. able and prevent wobbling 10 The product should be serviced by qualified service 4 This product in combination with headphones or speakers personnel if may be capable of producing sound levels that could A The power supply cord or the plug has been damaged cause permanent hearing loss Do not operate for a long B Objects have fallen into or liquid has been spilled onto period of time at a high volume level or at a level that is the product uncomfortable If you experience any hearing loss or ringing C The product has been exposed to rain in the ears you should consult an audiologist D The product does not appear to operate normally or 5 The product should be positioned so that proper ventilation is exhibits a marked change in performance maintained K The product has been dropped or the enclosure 6 The product should be located away from heat sources damaged such as radiators heat vents or other devices including 11 Do not attempt to service the product beyond what is amplifiers that produce heat described in the user maintenance instructions All other 7 The product should be connected to a power supply only servicing should be referred to qualified service personnel of the type described in the operating instructions or as marked on the product Replace the fuse only with one of the specified type size and correct rating An equilateral triangle enclosing a lightning flash arrowhead symbol is intended to alert th
4. ard IEC power cord receptacle used to connect the AC power to your unit It features a built in fuse holder for a 5X20mm 500mA 250V slow blow fuse If the fuse continuously blows shut off the unit and have it serviced by qualified service personnel There are 4 basic configurations in which the HPA 8 can be used all of which are functional in mono or stereo These input output configurations are selected simply by plugging your input source into the appropriate input sets The modes of operation are described below as 1 8 meaning that a single program source is directed to all 1 8 outputs 1 4 5 8 1 6 7 8 1 4 5 6 7 8 To use the HPA 8 in the 1 8 mode Connect a stereo or mono program source to the A input set at the rear of the unit Your source will be distributed to all 8 headphone outputs To use the HPA S8 in 1 4 5 8 mode Connect a stereo or mono source to A input set then connect a 2nd stereo or mono source to the B input set This distributes source B to be to headphone outputs 5 8 while source A is distributed to headphone outputs 1 4 To use the HPA 8 in 1 6 7 8 mode Connect a stereo or mono source to A input set then connect a 2nd stereo or mono source to the C input set This distributes source C to headphone outputs 7 8 while source A is distributed to headphone outputs 1 6 To use the HPA 8 in 1 4 5 6 7 8 mode Connect a stereo or mono source to A input set connect a 2nd stereo or mono source to t
5. ce Service For Your NADY AUDIO Product U S Should your NADY AUDIO product require service please contact the NADY Service Department via telephone at 510 652 2411 or e mail at service nady com International For service please contact the NADY AUDIO distributor in your country through the dealer from whom you purchased this product Do not attempt to service this unit yourself as it can be dangerous and will also void the warranty MADY am LUIS DLO gt NADY SYSTEMS INC 6701 Shellmound Street Emeryville CA 94608 Tel 510 652 2411 Fax 510 652 5075 www nady com
6. e user to the presence of uninsulated dangerous voltage within the product s enclosure which may be of sufficient magnitude to constitute a risk of electric shock CAUTION DO NOT OPEN ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR An equilateral triangle enclosing an exclamation point is intended to alert the user to the presence of important operating and service instructions in the literature enclosed with this unit DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK Date of Purchase Dealer s Name City State Zip Model Serial INSTALLATION To ensure years of enjoyment from your NADY AUDIO HPA 8 please read and understand this manual thoroughly before using the unit INSPECTION Your HPA 8 was carefully packed at the factory in packaging designed to protect the units in shipment Before installing and using your unit carefully examine the packaging and all contents for any signs of physical damage that may have occurred in transit Note Nady Systems is not responsible for shipping damage If the unit is damaged do not return to us but notify your dealer and the shipping company immediately to make a claim Such claims must be made by the consignee in a timely manner CONTENTS e Instruction manual e HPA 8 verify that the unit s serial number is same as shown o
7. er headphone amplifier in its price range Please read this manual carefully to get the most out of your new unit Thanks for selecting NADY AUDIO as your choice in headphone amplifier Features audio with maximum headroom even at high headphone volume levels e Three balanced line level input channels with capacity to distribute one input signal to all headphones or group the headphone outputs depending upon input configuration for monitoring flexibility e Mono Stereo selector switch for each set of inputs e High quality rugged 1U construction Shielded internal power supply with 115V 60Hz 230V 50Hz select switch and fused IEC power cord connector Warning When using this electronic device basic precautions should 8 The power supply cord should 1 be undamaged 2 never always be taken including the following share an outlet or extension cord with other devices so that 1 Read all instructions before using the product the outlet s or extension cord s power rating is exceeded 2 Do not use this product near water e g near a bathtub and 3 never be left plugged into the outlet when not being washbow l kitchen sink in a wet basement or near a used for a long period of time swimming pool etc 9 Care should be taken so that objects do not fall into and 3 This product should be used only with a cart or stand that liquids are not spilled through the enclosure s openings will keep it level and st
8. he B input set then connect a 3rd stereo or mono source to C This distributes source C to headphone outputs 7 8 while source B is distributed to headphone outputs 5 6 and source A is distributed to headphone outputs 1 4 Mono Stereo operation In any In Out configuration it may be desirable to use the unit with mono program source s This is made possible by the addition of a mono stereo switch per input set When using the HPA 8 with a mono source program simply use the L Mono input and select mono mode by pressing the mono stereo switch in It is possible to use the HPA 8 s output distributions in mono and stereo modes simultaneously For example by selecting stereo mode at input set A and selecting mono mode at unused input sets B or C refer to the distribution configurations detailed in the preceding paragraphs it is possible to monitor the program source in stereo at outputs 1 4 while monitoring the program source in mono at outputs 5 8 The program source at the L Mono input for input set A will be routed to both left tip and right ring earphones for outputs 5 8 in this example Note that if the input Using the HPA 8 set used is in mono mode all distributed outputs will be mono regardless of the other mono stereo switch positions Monitoring two mono sources with one headphone output Another monitoring option that can be realized with the HPA 8 is split distribution of different mono program sources Th
9. is can be accomplished by utilizing the R inputs of input sets B and C in stereo mode while using the L Mono input of input set A In this configuration source A will be routed to the left earphone tip of distributed headphone outputs while source B is routed to the right earphone ring Specifications AUDIO INPUTS GOMMOCIOMS sioria ianiai 1 4 jack Balanced IMPO GANCE x ines ccsscereedecteascterneste 40KO Peak input level eee 25dBu HEADPHONE POWER AMPLIFIER OUTPUTS Max output ee 100mMW 320 DISTORTION FREQUENCY RESPONSE S N RATIO amp CROSSTALK DiIStOrtiOM nrn nnar lt 0 02 Frequency 65800086 20Hz 20kHz 2dB S N 3100 cnno Better than 80dB Cross talk rejection oo eee gt 68dB 1kHz 200 input FUNCTION CONTROLS Per channel variable Mono Stereo Switch eee Per input set POWER SUPPLY AC Selectable 100 120 VAC E ELA A 200 240V AC 50 60 Hz 0 100 120 VAC 500mA slow blow A E E 200 240 VAC 250 mA slow blow E ELTE AE E 100 240 VAC 500 mA slow blow 0 5X20mm glass type Power cord Connector Standard IEC receptacle w built in fuse holder PHYSICAL DIMENSION Sisina an HWD 45mm X 483mm X 210mm Weight veseeeccessseessveactesdeseeetiereaveectes 6 15 Ibs The specifications above are correct at the time of printing of this manual For improvement purposes all specifications for this unit including design and appearance are subject to change without prior noti
10. n shipping carton e 0 Power cord e Warranty Card RACK MOUNTING The HPA 8 fits into one standard 19 rack unit of space 1 3 4 Parts of the unit can become very warm during use This is nor mal during operation Care should be taken to ensure that there is enough space around the unit for cooling at least 12 or 30cm Do not place the HPA 8 on high temperature devices such as power amplifiers etc or the unit may overheat in operation Also do not place the unit on speakers as this may cause them to move and or fall due to speaker vibrations Although the unit s chassis is shielded against radio frequency RF and electro magnetic interference EMI extremely high fields of RF and EMI should be avoided POWER CONNECTION The HPA 8 has an internal power supply and is designed to oper ate from an external AC source Power requirements for electrical equipment differ from area to area Be sure to confirm that the voltage selected by the voltage selector switch on the back panel is proper for your area 120VAC 60 Hz or 230VAC 50HZ per the information below Europe except UK 230V 50Hz UK and Australia 240V 50Hz USA and Canada 120V 60 Hz Installation For other areas please check with local authorities When ready to operate plug the AC cord into the power source Make sure that the unit is turned off before connecting to the AC power source to avoid possible loud transients which can damage your speakers or
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