Please Help Me - VOX AC15Hw

Discussion in 'Amps and Cabs' started by Resonate01, Apr 19, 2017.

  1. Resonate01

    Resonate01 Member

    Oct 1, 2012
    Pickering, Ontario
    Just need help trying to figure out what's wrong with my amp.

    A couple weeks ago I bought a Vox AC15HW used, tried it at his house, sounds great. I brought it home and tried it with my rig, the next day at church I noticed some buzzing and quite a bit of noise. After about a week playing around with it, I notice some noise in behind my playing (egg frying noise) and volume jumps. It got worse as I added gain.

    Naturally, the first thing I did was change the tubes. I had a few extra power tubes that I put in the amp, and also added some brand new tung sols in the preamp section, as well as an older sovtek lps for v3, which I had lying around for a while.

    With the tube change, amps sounds really good. No noticeable volume jumps, but I still hear the background noise behind my playing. Everytime I strike a note, I hear the amp buzz a little bit. It's not really noticeable playing clean, but as I add gain stages with my pedals, it seems to get louder and more obnoxious.

    Could it be one of the older tubes? Or maybe something else? I don't really know where to start to be honest.

    Oh, also I tried with and without my pedals in the chain, didn't make a difference in noise.
  2. Guinness Lad

    Guinness Lad Silver Supporting Member

    Nov 11, 2004
    On top a mountain of Chocolate Chips
    Gain will add noise, regarding the noise if you have a blue you are now amplifying a lot more high than before. It's possible especially if you attack the notes hard that the buzzing is fret rattle. The speaker is now amplifying this noise, I think you should make sure it's not your guitar and/or playing.
  3. GuitarArt1980

    GuitarArt1980 Member

    Jul 14, 2011
    Seattle, WA
    I had a similar issue with a used ac15hw i bought a few years ago. Turns out it was a bad volume pot that needed replaced. Is the noise there on both the top boost and normal channels? Either way, I'd take it to a tech
  4. TheWayfarer84

    TheWayfarer84 Silver Supporting Member

    Jun 5, 2008
  5. ken374

    ken374 Member

    May 4, 2011
    South East Michigan
    I know the hot switch channel has a lot of hiss when I had one

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