Kenwood Basic C2 Preamplifier Restoration/Upgrade

Discussion in 'Kenwood-Trio/Kensonic-Accuphase' started by vsat88, Apr 20, 2017 at 3:10 PM.

  1. vsat88

    vsat88 Like my Bluetooth ?

    Messages:
    428
    Location:
    Phenix City, AL.
    Myself and a few others have been posting in a C1 thread and we wanted to break away from doing so by starting a thread about the C2 Kenwood Basic Preamplifier so the information would be easy to find if others needed it. We were going to detail the upgrades and restoration to this unit a bit at the time. . I would like to thank @Leestereo for starting the C1 thread that this thread was named after. You will find a plethora of fine information and facts about both units here :
    http://www.audiokarma.org/forums/in...c-c1-preamplifier-restoration-upgrade.609337/
    More to come..Thanks for watching !
     
    Karl vd Berg likes this.
  2. Karl vd Berg

    Karl vd Berg Super Member

    Messages:
    1,786
    Location:
    A'dam
    Nice! :thumbsup:

    The C2 is a complete and nice preamp. Having seen quickly the schematic, it has nice/really good components in it, so how do you describe the sound of your unit?
     
  3. vsat88

    vsat88 Like my Bluetooth ?

    Messages:
    428
    Location:
    Phenix City, AL.
    Mine sounds like you explained on your C1 before the upgrades. "turning the volume up high and there was no bass and weak sound" I cant really say it sounds bad. I do not know exactly how to explain it except kind of as you said, weak and little bass. and I have to turn the volume up too far to it to go louder. Its clear as a bell but for a dOUK aUDIO 40.00 tube 12V preamp to sound better than the C2, that is just not right. I have tried everything I can think of. Upgraded the Op amps, a complete capacitor shotgun, diodes swapped with the 16V fast recovery ones, cleaned every switch, every pot. It all works perfectly. It just does not sound as nice as I think it should. I will have to say that I do not use any loudness treble or bass controls. I run every bit of my equipment that way. To me if I have to use that then something is not right to start with. I am using a matching Basic M2 amp as well. Both gain controls are all the way up on the amp..I may just sell it and buy a American made preamp as I have a B&K ST-202+ Amp and my speakers are Polk Audio SDA-SRS 's so, maybe go all Americian made equipment ??
     

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