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WITHDRAWN OR RELISTED: EOI: Adcom GFA 7805 - 300Wx 5 Power Amplifier


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Item: Adcom GFA 7805 multichannel power amplifier 300W x 5

Location: Adelaide

Price: 1200

Item Condition: Excellent (see info)

Reason for selling: surplus

Payment Method: Pickup - Cash, Paypal, COD Only

Extra Info:

Great amplifier, plenty of power. Pretty much can drive any speakers

it is a big beast though weighing 40kg+ so shipping can be an issue. I do have the original double box that came with the unit.

Can take XLR / RCA and never run hot. 

Also it is the power plug has been upgraded to a VOO DOO audio one (US). 

For some reason, this unit does have a hum in my setup. You don't hear it when watching movies. I am not sure what is causing the hum. So priced accordingly. 

Review:

Reviewer prefer it over the anthem A5

http://www.avrev.com/home-theater-power-amplifiers/multi-channel-amplifiers/adcom-gfa-7805-multi-channel-power-amplifier-3.html

Note: you do not need 20A circuit, that only applies for 110v units, this has been working fine with 10A circuit without any issues.

 

Specifications:

Description: Five-channel solid-state power amplifier. Inputs: 1 line-level (RCA & XLR) per channel, switch-selectable; 12V signal input for remote power control. Binding posts: 1 pair multiway per channel.

Continuous power: 300Wx5 into 8 ohms (24.8dBW), 450Wx5 into 4 ohms (23.5dBW); both at

Input sensitivity for full output: 1.61V RMS. Voltage gain: 29.67dB.

Input impedance: 500k ohms (RCA), 10k ohms (XLR).

THD+noise (typical):

Frequency response: 10Hz-20kHz, +0/-0.25dB at 1W, 8 ohms.

Power bandwidth: 3Hz-130kHz, -3dB.Signal/noise: >112dB, A-weighted.

Damping factor: >500.

Dimensions: 17" W by 8¾" H by 19¾" D. Weight: 88 lbs.

Pictures:

Note: not actual unit, but looks the same as the unit is in excellent condition

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Adcom-GFA-7805_10.thumb.jpg.0e25adf93e7c43806de93d2cda1bffb9.jpg

 

 

 

 

 

Edited by cyberkank
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Is the hum mechanical from the transformer or through the speakers? A lot of the Adcom transformers are very DC sensitive and hum/buzz mechanically when there's a bit of DC on the mains. Some of the Pass Labs ones I've seen have been also. 

Edited by treuben
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6 minutes ago, treuben said:

Is the hum mechanical from the transformer or through the speakers? A lot of the Adcom transformers are very DC sensitive and hum/buzz mechanically when there's a bit of DC on the mains. Some of the Pass Labs ones I've seen have been also. 

It is through the speakers. 

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