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Ampeg BA110 bad humming sound????

Discussion in 'Amps and Cabs [BG]' started by Sparty, Jan 2, 2013.

  1. Sparty


    Dec 26, 2012
    Have got an ampeg BA110 practice amp but ever since I've had it it has a hum ( earth type sound). She plays fine just shouldn't have that hum. I Would send it back but I ordered a BA108 and they sent a BA110 by mistake (not complaining) just want to know if there's a cure for the humming noise (not feedback- hums when no inputs in play).
    Tried different kettle leads - no change.
    Anybody got any ideas.
    Cheers sparty..
  2. RickenBoogie


    Jul 22, 2007
    Dallas, TX
    Tried different outlets?
  3. B-string

    B-string Supporting Member

    Tried a different power cord in case the ground lead is open?
  4. Sparty


    Dec 26, 2012
    Have tried different kettle leads ( ones the band uses regular ) still the same (Although i havent checked they were earthed tho).Just had a thought that I'm in UK perhaps this unit was built for the states. Would that make any difference??
    Personally I can live with it. its just for home use but if I want to move it on then it will effect the sale...
    For 35 watts it really kicks out some noise.. When the neighbours are fighting I just turn it on and smash out a few base lines-rattles the walls. They soon start banging in the walls ( the power of bass) argument over.
  5. BassmanPaul

    BassmanPaul Gold Supporting Member

    Aug 25, 2007
    Toronto Ontario Canada
    If you bought it from a UK supplier then it should be correct for your area, especially if it was supplied with a 13A plug. The operating voltage should be clearly marked on the back panel. An amp should make little noise without anything in the input. If it does I would think the unit faulty.
  6. Woodstockz


    Sep 23, 2011
    San Diego, Ca
    Is your bass shielded? I have a P-bass that hums. I hope to fix that with shielding and new pickups.
  7. BassDrumGA


    Feb 27, 2015
    My BA-110 has the same noisy hum AC-ground sound when it is on with nothing plugged. I hate it every time when the band stops playing. I've tried different places but it is the same and I have not clue what I can fix it.
    The AC outlet in Taiwan is two-pronged plug (hot/neutral) not three(hot/neutral/ground) in US. I am figuring to provide the 'ground' in an electronic lab so that the 3rd ground plug can be tied to a good earth ground.
    - BassDrum Crafter
  8. AlexanderB


    Feb 25, 2007
    Is it a BA110 v1 or v2 that hums?
  9. BassmanPaul

    BassmanPaul Gold Supporting Member

    Aug 25, 2007
    Toronto Ontario Canada
    Alex, the OP hasn't been active on the site since sometime last year. Hopefully he has some sort of resolution by now. :)
  10. BassDrumGA


    Feb 27, 2015
    How do I distiguish v1 or v2?
    The earth-like hum sound can be heard without any input from 1/4" input, stereo RCA AUX. The only 'fortunate' thing is that the hum is at a fixed level without change by input/CD level volume, or EQ knobs.
  11. JimmyM


    Apr 11, 2005
    Apopka, FL
    Endorsing: Ampeg Amps, EMG Pickups

  12. AlexanderB


    Feb 25, 2007
    Yeah, like Jimmy shows, the V1 has white piping (and some years - not all - are tilting!) but the V2 has an all black grill.

    My V1 hums loudly if there is a light dimmer in the house (even with both volumes off). None of my six other (current or used to have) bass amps has done that.
  13. BassDrumGA


    Feb 27, 2015
    Many thanks, Alex. Mine hum BA-110 AMP is v1 which is 35W. I believe v2 is 40W.
    The hum usually doesn't bother in a band practice, but it annoys me when I play in the quiet midnight.
  14. AlexanderB


    Feb 25, 2007
    No problem. :thumbsup:
    I think that replacing the amplifier's stock chassis line voltage connector with this sort of filter would help you, though.

    So, remove this one:


    And replace it with this:
    It can be bought from stores that sell electronical components and probably also from shops that sell or repair household applicances:
    TE Connectivity Mains EEJ Series | Rapid Online

    Please note that it is best to match the filter capacitance to the properties of the amp. Schaffner has an on-line guide, I think. The replacement procedure should be done by a competent technician!
  15. BassmanPaul

    BassmanPaul Gold Supporting Member

    Aug 25, 2007
    Toronto Ontario Canada
    I don't think that replacing the power inlet socket would make any difference whatsoever. Anything coming in would be transformed down to the require voltage, rectified and smoothed by the power supply. If the OP is hearing a hum with nothing connected then the amp is likely faulty.

    As the OP is still absent after eighteen months or so I would guess the whole point is moot.
  16. AlexanderB


    Feb 25, 2007
    The thread can maybe still be useful to other people experiencing the problem related to this amp (because this amp is not as resilient and well behaving as other amps I have tried).
    Paul, the type of inlet in the lower picture contains a filter section to de-couple harmonics in the line voltage from the power outlet. While the incoming current is rectified and "smoothed" (at least to some extent), it is blatantly obvious that the circuit design and implementation is the worst I have experienced in a bass amp, from an EMI POV.
    As I said, even with the input connected ("loaded") and the gain turned all the way off, any external line voltage ripple will pass straight through the power supply and manifest in the amplifier and end up in the speaker. If the ripple is filtered down in the Schaffner connector, the buzzing will reduce in level.

    While I do not have an inlet filter at hand, I intend to measeure my own BA110 with and without filter and see what (if any!) difference it will do.
  17. orson cane

    orson cane

    Jul 2, 2016
    Hi Alex, I have recently purchased one of these BA110 V1 amps that has the "hum" even without any input connected. Did you manage to reduce yours?
    There is also a disconcerting "pop" when turning the amp on or off even with the volume down.
    AlexanderB likes this.
  18. AlexanderB


    Feb 25, 2007
    Well, soon after my post, I found a less discriminating person that was interested in the amp, so I sold it to him.
    Good luck with yours!
  19. chadds


    Mar 18, 2000
    It could be your drummer. You never asked if he could sing. You never asked him if he wanted to sing. So he's back there fulfilling his role but that ominous hum comes leaking out......:(
    Oddly likes this.
  20. orson cane

    orson cane

    Jul 2, 2016
    LOL ... I haven't played with a drummer since the mid eighties, for some reason I gave up my aspirations for being a guitarist, I must have found another interest ...probably women!
    Anyway I've just started to get back into it after my son had a few lessons (man I wish I'd have kept with it, be a virtuoso by now LOL)
    Actually after using the Ampeg for a few hours I'm really liking the tone and the volume is sure loud enough for home use, I'm starting not to notice the (drummer) hum :)
    Last edited: Jul 6, 2016
    JimmyM likes this.