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  1. G

    SV20H volume up and down at 16 ohms

    I followed your advice and focused my attention on the 1960 switcher. After several mono/stereo tests I decided to remove the switcher panel. I unplugged and replugged the speakers connections and sprayed everything with electrical contact cleaner spray. I reassembled the panel and "magically"...
  2. G

    SV20H volume up and down at 16 ohms

    I've been playing the excellent SV20H for a couple of months, I use it at rehearsals with an 8 ohm 1922 cabinet: it works well and is perfectly loud. I use an attenuator (SPL Reducer). At home I use it with a 16 ohm 1960AV cabinet and here is a problem. Often, as soon as I start playing, the...
  3. G

    Passive attenuator for JCM2000 DSL

    Hello! I am an italian happy owner of SPL Reducer; with this I can study at home by setting my SV20H all the way up (loudness at 10 with 5W power). Obviously I can't expect to hear the sound of a Plexi 100W all the way up at Madison Square Garden stage (also for a lot of other reasons … 😄) but...
  4. G

    Open Jmp-1 Chassis

    I opened the chassis and I sprayed some cleaner: now the pot is silent, no more scratch!. The battery still looks good: It works fine since 1993!. Unfortunately it could not be replaced directly. Thank you for all guys!
  5. G

    Open Jmp-1 Chassis

    Thank you for your answer!
  6. G

    Open Jmp-1 Chassis

    The volume pot of my old JMP-1 is very scratchy and noisy so I would like to spray some switch cleaner into it. I tried to open the chassis. I have unscrew the 3 rear screws but nothing happened; I also have unscrew the six little screws on the golden edge (top & bottom) but nothing happened: it...

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