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Furman HA-6A, Руководство пользователя

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20K ohms. -4 dBV (635 mv) required for full output. HA-6A, 1/4* stereo phone, balanced or unbalanced; HA-6AB, both stereo 
phone (balanced or unbalanced) and XLR (balanced). 
 
. 01 % THD at full rated power at 1 KHz; 
.05% THD 20Hz to 20 KHz. 
Greater than 99 dB below full rated output. 
+0, -1 dB from 20 Hz to 20 KHz, 1 watt output. 
2 dB, stereo, measured with 10 ms toneburst at I KHz, 
1 % duty cycle. 
HA-6A, HA-6AB: 120 VAC, 60 Hz, 70 wafts 
HA-6AE, HA-6ABE: 230 VAC, 50/60 Hz, 70 watts 
Dimensions: 1.75" H x 19" W x 7.25" D. Wt: 7.5 lbs (3.4 kg) 
 
.......... 
 
 

I

ntroduction 

 

Congratulations on your purchase of a Furman Sound HA-6A. You have chosen the most versatile headphone amplifier 

available. The HA-6A is a unique

 

combination of a headphone amp and a conventional power amp, which can save the expense 

of an extra power amp in many situations. Its high power capacity allows it to provide adequate headphone listening levels 
without distortion in any environment. Additionally, the HA-6A's new toroidal transformer assures noise-free performance. It 

eliminates

 electrical hum and mechanical noise from the unit itself, as well as leakage into other sensitive equipment, such as 

mic preamps, video monitors, etc. 

The HA-6A is designed for recording studios, rehearsal studios, 

language

 labs, and for use in demonstrations of audio tracks 

or audio equipment. 
 

Features 

 

•

  Powers headphones AND speakers 

•

  20 watts per channel, stereo 

•

  Toroidal power transformer for ultra-quiet performance 

•

  6 headphone outs, each with its own volume control 

•

  Switches for two sets of speakers 

•

  Automatically switches to mono mode when right channel is not used 

•

  Overload and signal-present LED's for each channel 

Содержание HA-6A

Страница 1: ...Warranty Registration Card immediately Please verify that the serial number shown on the Warranty Card matches the serial number on your unit I HA 6A SPECIFICATIONS OUTPUTS Power Connectors INPUTS Input Impedance Sensitivity Connectors GENERAL Distortion Signal to Noise Frequency Response Dynamic Headroom Power Requirement Mechanical 20 watts per channel stereo into either 4 ohms or 8 ohms 20 Hz t...

Страница 2: ...power amp which can save the expense of an extra power amp in many situations Its high power capacity allows it to provide adequate headphone listening levels without distortion in any environment Additionally the HA 6A s new toroidal transformer assures noise free performance It eliminates electrical hum and mechanical noise from the unit itself as well as leakage into other sensitive equipment s...

Страница 3: ... channel the HA 6A s higher power can drive headphones of any impedance to their full rated listening level and do so with minimal noise and distortion Its power capacity is also just right for the small cube reference speakers used in most recording studios as a comparison with the main control room monitors it can power them without overpowering them On the studio floor a set of small monitor sp...

Страница 4: ...nerally derived from a Cue or Headphone mixing buss on the recording console which is then routed to the Left and Right Inputs on the HA 6A s rear panel If this mix is mono connect it to the Left Input The HA 6A will then automatically be in mono mode so that the mix can be heard with both ears and both speakers if used In a small studio if no more than six sets of headphones are needed it may be ...

Страница 5: ... 6A Language Labs Language labs occasionally need to drive as many as 50 headphone sets If more than twelve sets are required they should be high impedance types HR 2 Remote Stations provide a convenient way to place a volume control at each listening position two listeners can share each box Use of the HR 2 Remote Stations Satellites The HR 2 Remote Stations may be used to increase the number of ...

Страница 6: ... until the LED remains off The lights turn on when the signal level at either output approaches 5 to 1 dB of clipping Once triggered the lights will stay lit for a minimum of 50 milliseconds so they can be easily seen even if the actual duration of the overload is much shorter HEADPHONE JACKS VOLUME CONTROLS Any type of headphones wired with a standard 1 4 stereo phone plug may be used successfull...

Страница 7: ...anana plugs bare wires or wires terminated in spade lugs SPEAKER B SATELLITE R EMOTE OUTPUT This output is a single male XLR connector containing both the left and right channel outputs It is wired as follows Pin 3 left high Pin 2 right high and Pin 1 low common to both channels This output should be used as the starting point for a chain of HR 2 Remote Stations satellites It will receive signal w...

Страница 8: ...rting the differential amp to a noninverting amp After the buffers the left and right signals proceed to the two decks of the stereo Input Level control The HA 6A s power amplification is derived from a pair of LM1875 integrated circuits which have internal short circuit and thermal overload protection They are set for a voltage gain of 26 dB The LM1875 s drive the speaker outputs directly The hea...

Страница 9: ...it is insured We suggest that you save the original packaging and use it to ship the product for servicing Also please enclose a note giving your name address phone number and a description of the problem NOTE All equipment being returned for repair must have a Return Authorization R A Number To get an R A Number please call the Furman Service Department 707 763 1010 Ext 40 between 8 am and 5 pm U...

Страница 10: ...tio Grapl I U PUNCH 10 Bass Enhancement Systum X 312 12 dB Crossover X 324 2 Way 3 Way 24 dB Cros voir X 424 3 Way 4 5 Way 24 d13 Cr r X 524 4 Way 24 dB Crossover C 1 28 Compressor Limiter LC 6 Stereo Compressor Gate QN 44 Quad Noise Gate SP 20A Stereo Halt Rack Power Amp 20W per channel HR 2 Headphone Passive Remote box MM 4A 4 x 1 Rack Mount Mixer MM 8A 4 x 2 Rack Mount Mixer DJM 6 DJ Production...

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