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A/B Switching between the 2 inputs on a 70's Ampeg v4-b

Discussion in 'Amps and Cabs [BG]' started by tolas, Apr 27, 2006.


  1. tolas

    tolas

    Mar 16, 2005
    The pre-amp tubes I have hooked up to each input are very different. Input 1 is a nice clean tone that requires a ton of volume to break up, and Input 2 is a very high-gain tube.

    I'd like to use an A/B switch to switch between the two settings/volumes in the middle of playing. I'm just wondering if this is bad for the amp to switch right into/out of the inputs like that.
     
  2. anderbass

    anderbass

    Dec 20, 2005
    Phoenix. Az.
    Great Idea, It wont hurt your amp. I use a A/B/Y pedal to switch between 1-2 or both channels, on my Mesa 400+.
     
  3. Yeah, it won't hurt the amp at all. But...if your channels are acting that different, something isn't right. Check and make sure all the correct tube types are in there.

    -Nick
     
  4. tolas

    tolas

    Mar 16, 2005

    Ehh, to be honest, I just think the 1st channel pre-amp tube is a little weak. It's far quieter than channel 2, and doesn't start to break up till like 12:30 on the dial. Where as channel 2 is very "hot" and breaks up around 10:00. I think this is the only difference. Other than a bit of a tone difference. I just kinda want a quiet channel and a loud/dirty channel.

    The power tubes / cap were replaced about 6 months ago, and really brought out the difference in the pre-amp tubes.
     
  5. channel 2 sounds normal...with a passive bass. My MM Sterling would start to distort at like 9:00.

    -Nick
     

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