Adcom GFP-1A issue

rmaiers
rmaiers Posts: 145
in 2 Channel Audio
I just picked up some "new" gear that includes:

1 ADCOM Preamp Model GFP-1A
1 ADCOM Power amp Model GFA-555
1 DENON AM-FM Tuner Model TU-400
1 DENON Stereo CD player Model DCD-1100
1 DENON Stereo Cassette Tape Deck Model DR-M33HX
1 DENON Stereo Cassette Tape Deck Model DR-M34HR
2 Genesis Model 66 Series 2 speakers

I hooked everything up and it sounds great but there may be an issue with the preamp. With the balance in the neutral position I get equal volume from both speakers, when I turn it all the way left there is no change, when I turn it all the way to the right there is no sound from either speaker. Does anyone have any ideas about this problem?
· Share on FacebookShare on Twitter

Comments

  • cnh
    cnh Posts: 13,284
    Any scratchiness in sound when turning? Might consider a little Deoxit in the pots first and then move to other possibilities.
    Currently orbiting Bowie's Blackstar.!

    Polk Lsi-7s, Def Tech 8" sub, HK 3490, HK HD 990 (CDP/DAC), AKG Q701s
    [sig. changed on a monthly basis as I rotate in and out of my stash]
    · Share on FacebookShare on Twitter
  • rmaiers
    rmaiers Posts: 145
    No scratchiness when turning.
    · Share on FacebookShare on Twitter
  • rmaiers
    rmaiers Posts: 145
    Operator error, I had it connected wrong. Everything is great!
    · Share on FacebookShare on Twitter
  • rmaiers
    rmaiers Posts: 145
    You are exactly right :)
    · Share on FacebookShare on Twitter
  • leftwinger57
    leftwinger57 Posts: 2,917
    just for my info. What model of 555 do you have. I have a series one rack face that has never failed and according to the spec sheet from Audio Classics puts out a bit more than 200 w a side. No affiliation w/ AC. just a happy customer.
    2chl- Adcom GFA- 555-Onkyo P-3150v pre/amp- JVC-QL-A200 tt- Denon 1940 ci cdp- Adcom GFS-6 -Modded '87 SDA 2Bs - Dynamat Ext.- BH-5- X-Overs VR-3, RDO-194 tweeters, Larry's Rings, Speakon/Neutrik I/C- Cherry stain tops Advent Maestros,Ohm model E

    H/T- Toshiba au40" flat- Yamaha RX- V665 avr- YSD-11 Dock- I-Pod- Klipsch #400HD Speaker set-

    Bdrm- Nikko 6065 receiver- JBL -G-200s--Pioneer 305 headphones--Sony CE375-5 disc
    · Share on FacebookShare on Twitter
  • rmaiers
    rmaiers Posts: 145
    I believe I have the same model, it has a rack face. Very nice amplifier. A review of the amp I read is the 200 watt per channel rating is very conservative. It is a huge upgrade from the Adcom GFA-1 I was running that is also rated at 200 watts per channel.
    · Share on FacebookShare on Twitter
  • rmaiers
    rmaiers Posts: 145
    http://www.humanspeakers.com/genesis/gen66.htm

    Here is a link to the speakers I got, Genesis Model 66 Series 2. According to a man who worked at Genesis at most 100 pair were produced.
    · Share on FacebookShare on Twitter