| The HA-6AB Headphone/Monitor Amplifier from Furman
is a unique combination of a headphone amp and a conventional power
amp. This combination of functions can save the expense of an extra
power amp in many recording studios.
The HA-6AB is basically an
economical 20-watt per channel stereo amplifier. Unlike a conventional
power amp, it has six headphone outputs (stereo phone jacks) on the
front panel, each with an associated volume control. When used for
overdubbing or rehearsal, this provides more than adequate loudness in
all headphones (even older low-impedance models), and allows you to set
your own comfortable volume level. When the overdubbing is complete and
you remove your headphones, the HA-6AB can power the tape playback
through either (or both) of two sets of studio monitor speakers,
selected by pressing front panel pushbuttons.
The HA-6AB also
features a convenient input level control on the left side of the front
panel. A pair of yellow LEDs-one for each channel-light up whenever
signal is present (threshold -28 dBu). Another pair of red LEDs show an
overload condition in either channel.
20 watts per channel make
the HA-6AB ideal as a low-distortion headphone driver for the most
critical listening situations. The HA-6AB'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 speakers driven by the HA-6AB can make a session progress
more efficiently by giving you a chance to hear a playback without
needing to disconnect yourself from your equipment and walk into the
control room.
The HA-6AB utilizes an efficient toroidal power
transformer for silent operation and low magnetic leakage, as required
in a studio environment. It is fully protected against thermal
overload, and it can withstand a short circuit on any or all outputs
for an indefinite time without damage.
Furman HA-6AB Headphone/Monitor Amplifier Specifications:
- Outputs
- Power: 20 watts per channel, stereo, into either 4 ohms or 8 ohms, 20 Hz to 20 KHz
- Connectors: Speakers A-5-way binding posts (accommodates dual banana plugs, spade lugs, bare wires, etc.); Speakers B-Satellite
- Remote: male XLR
Inputs - Input Impedance: 20 kOhms
- Sensitivity: -4 dBV (635 mv) required for full output
- Connectors: both stereo phone (balanced) and XLR (balanced)
General - Distortion: .01% THD at full rated power at 1 KHz; .05% THD; 20Hz to 20 KHz
- Signal to Noise: Greater than 99 dB below full rated output
- Frequency Response: +0, -1 dB from 20 Hz to 20 KHz, 1-watt output
- Dynamic Headroom: 2 dB, stereo, measured with 10 ms toneburst at I KHz, 1% duty cycle.
- Power Requirement: 120 VAC, 60 Hz, 70 watts
Dimensions: 1.75"H x 19"W x 7.25"D - Weight: 7.5 lbs. (3.4 kg)
Furman HA-6AB Headphone/Monitor Amplifier Features:
- Powers headphones and speakers
- New toroidal transformer for studio-quiet operation and low magnetic leakage
- 20 watts per channel, stereo
- 6 headphone outs, each with volume control
- Switches for 2 sets of speakers
- Automatically switches to mono mode when right channel is not used
- Overload and signal-present LEDs for each channel
- Ground lift, on/off switches; power-on indicator
- Provision for remotely located volume controls
- Standard 1/4" phone inputs
- Provides balanced inputs with XLR connectors
- UL-CUL-CE listed
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