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MB 500 Fusion cooling fan noise?

Discussion in 'Amps and Cabs [BG]' started by tbirdsp, Apr 14, 2014.

  1. tbirdsp

    tbirdsp Supporting Member

    Sep 18, 2012
    Omaha, NE
    Just picked up a used MB500 Fusion from the TB classifieds. Seems to work great - however I was not prepared for how loud the fan is. Won't be an issue for live gigs, but I was expecting it to be quieter. Is this normal? The fan on my MB200 rarely (if ever) comes on, but of course it doesn't have 3 tubes heating it up either...
  2. happyg


    Sep 17, 2011
    I will probably get flamed for this......but from my personal experience with 2 of them....they have loud fans. Bought one...ended utvl returning it. Bought another one a year later....same thing. So, you don't have anything to worry about. Really quite a good head. The fan just got on my nerves when I would practice alone in a quiet room.
  3. Yup, fan is a bit whirry when it kicks in.
    But the amp sounds great so what the hell..........
  4. Yup. Unfortunately it was a deal breaker for me. I used it for quiet practice and rehearsals - I just found it too distracting when it kicked in.
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  6. tbirdsp

    tbirdsp Supporting Member

    Sep 18, 2012
    Omaha, NE
    OK - thanks guys! It's not THAT big of a deal for me, just wanted to make sure it was "normal".

    Was hoping for something quieter than my old Harke 3500 head and/or my rack rig with a Behringer NU3000 though - both have notoriously loud fans :meh:

    (I do have a quieter fan for the 3500, just haven't installed it yet- and it weighs 25 lbs vs 4 for the MB Fusion).
  7. Chef

    Chef Moderator Staff Member Supporting Member

    May 23, 2004
    Columbia MO
    Staff Reviewer; Bass Gear Magazine
    I think you'll find the fan runs more when you're not using it.
    Playing, it seems to kick on infrequently.

    I'm not "fan sensitive," so it's never bothered me
    SpruceApple likes this.
  8. steelbed45

    steelbed45 TRemington

    Feb 23, 2011
    Nolanville, TX
    Late to the thread, I know - I received a new MB 500 fusion 2 days ago and have "put it through its paces", so to speak. I, too, own an MB200...and the 500 fan is the same in that it rarely has come on, and is polite when it does so. Perhaps they have made an adjustment? (Edit: loving the tubey goodness from this thing...and I own an Alembic F1-X) :)
    By contrast, I purchased a TC Electronics BH 250-208 last month from GC. It sounded ok in the noisy, (very noisy,) GC at the time, but when I got it home, the fan on the back was blasting full on from the second the power went on. I took that back the next day.
  9. tbirdsp

    tbirdsp Supporting Member

    Sep 18, 2012
    Omaha, NE
    Haven't been posting much - been busy gigging:bassist: But yeah, as chef mentioned it seems to come on more when it's just sitting there rather than in use although you wouldn't hear it while you are playing anyway. Fan has been a non-issue in real world use. MB500 Fusion into my Avatar B212 Neo has become my go-to rig.

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