Adcom GFA-7500 5Ch THX Power Amp with Upgrades

Devlon
Devlon Posts: 355
edited January 2014 in For Sale (FS) Classifieds
For Pics go here: http://www.flickr.com/photos/86522064@N06/

I am selling an extra Adcom GFA-7500 that has resided in a no pet, no child, no smoke home. I bought it as a back up in case one of the two Adcoms that I use ever went down. They just never fail so I have decided to let it go. Because it has sat for several years two of the caps went bad. I took it to Hi-Tech Repair Service in Nashville as they are an authorized Adcom repair center. Ken Herron, a repair technician there, encouraged me to not only replace all the caps, but put in upgraded Nichicon Muse capacitors with a higher thermal rating (These are the ones in the photos that are gold and black colored. All 10 were replaced. They is another set in the bottom of the amp that you can’t see). These cost more than the stock caps. Four of the resistors with upgraded to Toshiba Silicon Low-Noise resistors as he said had a lower noise floor than the stock ones. The bias was reset. A photocopy of the receipt is included with the pics. The total for all this came to 175.00

Included is one of the dust covers that I had custom made for the Adcoms. I am anal about dust on electronics and have had dust covers made for every piece of audio gear that I own.

This amp is as clean as they get, inside and out. It is a friggin’ beast and is very powerful. Just an awesome sound with great low end. The GFA-750’s push my LSI’s with ease and really made them sing.

If you are looking for a great sounding power amp with upgrades here’s your amp! It is American made and has the Lucasfilm THX certification. I would like to get 450.00. Minus the repair/upgrades I will clear about 275.00 so I don’t want to take any less.

Thanks for looking!

Devlon

Feel free to call me at 270-842-6996 for any questions

================================================== ============================================

Reviews:

http://www.audioreview.com/cat/ampli...7_1583crx.aspx

http://www.epinions.com/reviews/elec..._GFA_7500?sb=1

ADCOM GFA-7500 Power Amplifier - SPECIFICATIONS

Power Rating (To FTC Requirements)
150 watts per channel continuous average power into 8 ohms
225 watts per channel continuous average power into 4 ohms
Any frequency with all channels driven at less than 0.075% THD
IM Distortion (SMPTE)
l watt to l50 watts into 8 ohms.......<0.05%
1 watt to 225 watts into 4 ohms.....<0.05%
IM Distortion (CCIF, Any Combination from 4kHz to 20kHz)
150 watts into 8 ohms.....<0.01%
225 watts into 4 ohms.....<0.01%
THD + Noise at 150 watts into 8 ohms (Typical)
20Hz.........0.006%
1 kHz........0.006%
10 kHz......0.02%
20 kHz......0.04%
THD + Noise at 225 watts into 4 ohms (Typical)
20 Hz........0.01%
1khz..........0.01%
10 kHz......0.035%
20 kHz......0.065%
Frequency Response at 1 watt into 8 ohms (10Hz to 20kHz)
...........+ 0, - 0.25dB
Power Bandwidth (-3dB)
...........1.5Hz to 100kHz
Dynamic Headroom Into 4 ohms
...........1.9dB
Signal to Noise Ratio, "A" Weighted (150 watts into 8 ohms)
...........> 115B Gain
.......29dB
Input Sensitivity
for 1 Watt output..........0.1 volts
for 150 Watts output....1.14 volts
Input Impedance
.........50K ohms
Damping Factor ( 20Hz to 20kHz )
........>800
Rise Time (5kHz, 90 V, peak-to-peak square wave, 20% to 80%)
........2.7 microseconds (uS)
Power Consumption (Continuous, All Channels Driven)
.....Quiescent.....80VA
.....Maximum.....1440VA
.....150 watts into 8 ohms.....1375VA
General Power (Available in 230VAC by special order)
.....115VAC - 50/60Hz
Chassis Dimensions
.....7.25" x 17" x 15"
(184.15mm) x (432mm) x (381mm)
Maximum Dimensions
.....6.875" x 17" x 14"
(174.625mm) x (432mm) x (355.6mm)
Weight
.....56 lbs. ( 25.4 kg )
Weight Packed
.....64 lbs. ( 29.1 kg )


Manual: http://www.adcom-usa.com/userguides/gfa-7500-ug.pdf
Living Room: HK AVR 354 as pre/pro, 2 x Polk Audio Micropro 4000, Adcom GFA-7500, 2 x Mirage OMD-15
2 x Mirage OMD-5, 1 x Mirage OMD-C1, APC H15, Sony S790, Philips 52" LCD, Beogram 3000, FAT (Firestone Audio Tobby DAC), Harmony One

Den: Sherwood R-972,as pre/pro, 2 x Velodyne SPL-1000R, 3 x Crown Drivecore XLS1500, 2 x Polk Audio Lsi9
1 x Polk Audio Lsic, 2 x Polk Audio Lsifx, Sony S790, APC H15, Dspeaker Dual Core 2.0, W4S DAC 2, Keces DA-151
Post edited by Devlon on
· Share on FacebookShare on Twitter

Comments

  • grimmace19
    grimmace19 Posts: 1,429
    edited January 2014
    Wow, fantastic price on the amp. I love mine and haven't ever had a problem with it. Good luck with the sale.
    · Share on FacebookShare on Twitter
  • GFOviedo
    GFOviedo Posts: 353
    edited January 2014
    So, the price for the amp is $450 correct? Does that include shipping or not?
    AVR: DENON X4000
    FRONT L/R: ARX A3RX-C
    CENTER: ARX A2RX-C
    SURROUND L/R: ARX A3
    SUBWOOFER: PSA-XV15

    SERVER: UNRAID 15TB
    MEDIA PLAYERS: DUNE SMART SERIES D1
    HDTV: VIZIO M601D-A3R
    · Share on FacebookShare on Twitter
  • Devlon
    Devlon Posts: 355
    edited January 2014
    Hey GFOviedo, yeah I can't include the shipping. Anyway, I just figured the shipping for a guy in Maryland. USPS was 41.00 and UPS was 45.00. If you want to do some figuring on your end my zip code is 42104 and the box is 23x19x13 and weights 64lbs

    Thanks,

    Devlon
    Living Room: HK AVR 354 as pre/pro, 2 x Polk Audio Micropro 4000, Adcom GFA-7500, 2 x Mirage OMD-15
    2 x Mirage OMD-5, 1 x Mirage OMD-C1, APC H15, Sony S790, Philips 52" LCD, Beogram 3000, FAT (Firestone Audio Tobby DAC), Harmony One

    Den: Sherwood R-972,as pre/pro, 2 x Velodyne SPL-1000R, 3 x Crown Drivecore XLS1500, 2 x Polk Audio Lsi9
    1 x Polk Audio Lsic, 2 x Polk Audio Lsifx, Sony S790, APC H15, Dspeaker Dual Core 2.0, W4S DAC 2, Keces DA-151
    · Share on FacebookShare on Twitter
  • Devlon
    Devlon Posts: 355
    edited January 2014
    Devlon wrote: »
    For Pics go here: http://www.flickr.com/photos/86522064@N06/

    I am selling an extra Adcom GFA-7500 that has resided in a no pet, no child, no smoke home. I bought it as a back up in case one of the two Adcoms that I use ever went down. They just never fail so I have decided to let it go. Because it has sat for several years two of the caps went bad. I took it to Hi-Tech Repair Service in Nashville as they are an authorized Adcom repair center. Ken Herron, a repair technician there, encouraged me to not only replace all the caps, but put in upgraded Nichicon Muse capacitors with a higher thermal rating (These are the ones in the photos that are gold and black colored. All 10 were replaced. They is another set in the bottom of the amp that you can’t see). These cost more than the stock caps. Four of the resistors with upgraded to Toshiba Silicon Low-Noise resistors as he said had a lower noise floor than the stock ones. The bias was reset. A photocopy of the receipt is included with the pics. The total for all this came to 175.00

    Included is one of the dust covers that I had custom made for the Adcoms. I am anal about dust on electronics and have had dust covers made for every piece of audio gear that I own.

    This amp is as clean as they get, inside and out. It is a friggin’ beast and is very powerful. Just an awesome sound with great low end. The GFA-750’s push my LSI’s with ease and really made them sing.

    If you are looking for a great sounding power amp with upgrades here’s your amp! It is American made and has the Lucasfilm THX certification. I would like to get 450.00. Minus the repair/upgrades I will clear about 275.00 so I don’t want to take any less.

    Thanks for looking!

    Devlon

    Feel free to call me at 270-842-6996 for any questions

    ================================================== ============================================

    Reviews:

    http://www.audioreview.com/cat/ampli...7_1583crx.aspx

    http://www.epinions.com/reviews/elec..._GFA_7500?sb=1

    ADCOM GFA-7500 Power Amplifier - SPECIFICATIONS

    Power Rating (To FTC Requirements)
    150 watts per channel continuous average power into 8 ohms
    225 watts per channel continuous average power into 4 ohms
    Any frequency with all channels driven at less than 0.075% THD
    IM Distortion (SMPTE)
    l watt to l50 watts into 8 ohms.......<0.05%
    1 watt to 225 watts into 4 ohms.....<0.05%
    IM Distortion (CCIF, Any Combination from 4kHz to 20kHz)
    150 watts into 8 ohms.....<0.01%
    225 watts into 4 ohms.....<0.01%
    THD + Noise at 150 watts into 8 ohms (Typical)
    20Hz.........0.006%
    1 kHz........0.006%
    10 kHz......0.02%
    20 kHz......0.04%
    THD + Noise at 225 watts into 4 ohms (Typical)
    20 Hz........0.01%
    1khz..........0.01%
    10 kHz......0.035%
    20 kHz......0.065%
    Frequency Response at 1 watt into 8 ohms (10Hz to 20kHz)
    ...........+ 0, - 0.25dB
    Power Bandwidth (-3dB)
    ...........1.5Hz to 100kHz
    Dynamic Headroom Into 4 ohms
    ...........1.9dB
    Signal to Noise Ratio, "A" Weighted (150 watts into 8 ohms)
    ...........> 115B Gain
    .......29dB
    Input Sensitivity
    for 1 Watt output..........0.1 volts
    for 150 Watts output....1.14 volts
    Input Impedance
    .........50K ohms
    Damping Factor ( 20Hz to 20kHz )
    ........>800
    Rise Time (5kHz, 90 V, peak-to-peak square wave, 20% to 80%)
    ........2.7 microseconds (uS)
    Power Consumption (Continuous, All Channels Driven)
    .....Quiescent.....80VA
    .....Maximum.....1440VA
    .....150 watts into 8 ohms.....1375VA
    General Power (Available in 230VAC by special order)
    .....115VAC - 50/60Hz
    Chassis Dimensions
    .....7.25" x 17" x 15"
    (184.15mm) x (432mm) x (381mm)
    Maximum Dimensions
    .....6.875" x 17" x 14"
    (174.625mm) x (432mm) x (355.6mm)
    Weight
    .....56 lbs. ( 25.4 kg )
    Weight Packed
    .....64 lbs. ( 29.1 kg )


    Manual: http://www.adcom-usa.com/userguides/gfa-7500-ug.pdf


    I POSTED THE LINK ABOVE WRONG. HERE IS THE CORRECT LINK:

    http://www.flickr.com/photos/86522064@N06/sets/72157640025375095/
    Living Room: HK AVR 354 as pre/pro, 2 x Polk Audio Micropro 4000, Adcom GFA-7500, 2 x Mirage OMD-15
    2 x Mirage OMD-5, 1 x Mirage OMD-C1, APC H15, Sony S790, Philips 52" LCD, Beogram 3000, FAT (Firestone Audio Tobby DAC), Harmony One

    Den: Sherwood R-972,as pre/pro, 2 x Velodyne SPL-1000R, 3 x Crown Drivecore XLS1500, 2 x Polk Audio Lsi9
    1 x Polk Audio Lsic, 2 x Polk Audio Lsifx, Sony S790, APC H15, Dspeaker Dual Core 2.0, W4S DAC 2, Keces DA-151
    · Share on FacebookShare on Twitter
  • GFOviedo
    GFOviedo Posts: 353
    edited January 2014
    I was interested in your amp, but I got lucky on craiglist and found someone selling a pair of Outlaws M200. I got both for $150 locally. GLWS.
    AVR: DENON X4000
    FRONT L/R: ARX A3RX-C
    CENTER: ARX A2RX-C
    SURROUND L/R: ARX A3
    SUBWOOFER: PSA-XV15

    SERVER: UNRAID 15TB
    MEDIA PLAYERS: DUNE SMART SERIES D1
    HDTV: VIZIO M601D-A3R
    · Share on FacebookShare on Twitter
  • Devlon
    Devlon Posts: 355
    edited January 2014
    Can't blame you! That's a great deal! I read a comment a while back that the owner said he was ready happy with his M200s. Great find!
    Living Room: HK AVR 354 as pre/pro, 2 x Polk Audio Micropro 4000, Adcom GFA-7500, 2 x Mirage OMD-15
    2 x Mirage OMD-5, 1 x Mirage OMD-C1, APC H15, Sony S790, Philips 52" LCD, Beogram 3000, FAT (Firestone Audio Tobby DAC), Harmony One

    Den: Sherwood R-972,as pre/pro, 2 x Velodyne SPL-1000R, 3 x Crown Drivecore XLS1500, 2 x Polk Audio Lsi9
    1 x Polk Audio Lsic, 2 x Polk Audio Lsifx, Sony S790, APC H15, Dspeaker Dual Core 2.0, W4S DAC 2, Keces DA-151
    · Share on FacebookShare on Twitter
  • GFOviedo
    GFOviedo Posts: 353
    edited January 2014
    Devlon wrote: »
    Can't blame you! That's a great deal! I read a comment a while back that the owner said he was ready happy with his M200s. Great find!

    Thanks. I already had 2 Outlaws M2200, and 1 Outlaw M200 powering my front. So this pair of M200 will complete my 5.0 set up. You've got a good amp at a good price there. GLWS.
    AVR: DENON X4000
    FRONT L/R: ARX A3RX-C
    CENTER: ARX A2RX-C
    SURROUND L/R: ARX A3
    SUBWOOFER: PSA-XV15

    SERVER: UNRAID 15TB
    MEDIA PLAYERS: DUNE SMART SERIES D1
    HDTV: VIZIO M601D-A3R
    · Share on FacebookShare on Twitter