protube

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    ProTube IV 2nd stage problem

    My ProTube IV has developed a problem with the second stage on the tube channel. The symptoms are first stage works fine with no problems. When the second stage is engaged it works fine for the first 10 to 15 mins then gets very noisy with very loud crackles and pops then goes dead. If I...
  2. L

    protube IV vs 2 fender cabs @ 8 ohms

    i am ilttle confused how to wire my 2 fender cabs@8 ohms to my protube IV head.in the manual it says 400@4 ohms but two outputs connected in parallel.is that mean if i connect the cabs seperatly(one to speak on,one to xlr)it will work @ 2ohms.or should i connect two cabs in parallel and use one...
  3. F

    ProTube IV - mute cutting in automatically

    Hi, I've just purchased 2nd hand ProTube IV (sounds Great!) but the mute button turns itself on intermittedly and won't turn off unless I turn the actual head off, then it seems to reset itself. I had someone look at it but of course it wouldn't do it when we wanted it too. I am wondering...
  4. M

    Protube IV impedence query

    Hi all, was just wondering if anyone could help me out on a (probably small) problem I have. I usually play my protube IV through a Hartke 8x10 and it sounds great, but the cab is on the large side.... When I gig I sometimes have the chance to run my amp through other bassists' cabs and...
  5. R

    Pro-Tube IV Gain knob

    Any one know how I can get a replacement Gain knob in the UK for my amp head? I left my band to put away my gear after a gig (bad move, I know) and the knob dis-appeared. It is the large knurled chrome variety Thanks in advance
  6. R

    Protube settings

    I have just bought an end-of-line Pro-Tube IV, and I am having difficulty understanding the manual and getting a good sound. Does anyone have any good amp settings they can share? For either SS or Hybrid channels, with a description of the cabs used and the sounds created?
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