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Help! Distortion/Farty cab w/Ashdown Little Bastard

Discussion in 'Amps and Cabs [BG]' started by jacksonev94, Feb 7, 2014.

  1. jacksonev94

    jacksonev94 Supporting Member

    May 12, 2012
    Lynchburg, VA
    I'm having a lot of problems with my cab, a GK MBE210, and my head, an Ashdown LB-30. Any time that I really dig in when playing, the LB does its characteristic tubey breakup (master at noon, EQ as flat as possible, BDDI running a slight bass boost with 40% blend, and an LMB-3 with the output at noon), but the speakers in my cab just completely fart out and distort. It sounds terrible, and it's really having an effect on my playing, since I'm terrified that any hard pluck/pick could provoke the noise. What could the problem be? This happens regardless of whether or not my pedals are plugged in, so I'm pretty sure it's the cab; I just don't know how to fix the problem. New cab, maybe?
  2. tbirdsp

    tbirdsp Supporting Member

    Sep 18, 2012
    Omaha, NE
    With the tone controls (Fender tone stack) of the LB-30 "EQ as flat as possible" is probably not what you think. I think you are probably just pushing the 30 watts too hard. I highly doubt it's your cab. Do you have another head to try with the cab?

    It's been a while since I've messed with mine - but trying to get an OK volume while keeping it semi clean is a challenge.
  3. basscooker

    basscooker Commercial User

    Apr 11, 2010
    cincy ky
    Owner, Chopshopamps.com
    I'm pretty sure there's no way a 30 watt amp can hurt a purpose-built 2x10 bass cab by a reputable manufacturer. Try the cab with another amp, before you get too mad at it-- do you have active pickups that may need a new battery? Is the cab used and new to you? you may have gotten somebody else's trash :/ I'd definitely rule out each part of the signal chain, one by one, until there's nothing left that it could be besides the cab.
  4. will33


    May 22, 2006

    That amp doesn't have the juice to fart out even the cheapest of 210 bass cabs assuming they're not already broken from something else.

    Knobs nooned on a fender tonestack is already bass boosted and mid scooped.....ie: already pushing those 30watts hard in the lows.
  5. With a hot passive bass the preamp may distort soon on the lb30. Try the active input and switching the bass frequency.
  6. basspedaler

    basspedaler Supporting Member

    Feb 18, 2013
    Yeah, you may be coming in strong with that BDDI. if your mid is at noon you're not running flat EQ. the mid is more like the gain. back it down to about 10:30. your bass knob can get close to noon, and the treble can further clean you up by leaning it to the plus side. it is a sweet amp! I like mine best with a baggie 15..

    some good talk on the tone stack:
  7. jacksonev94

    jacksonev94 Supporting Member

    May 12, 2012
    Lynchburg, VA
    Thanks for the input. I did some reading about the tone stack EQ, played around with it, and combined it with a very moderate EQ setting on my BDDI. Amp set as close to a "flat" response as possible, master at 11:30, bass at 12:30 and treble at 12:00 on the BDDI, and the level set to where I want my clean volume. Sounds tight and punchy, with some good volume and growl.
  8. shwashwa


    Aug 30, 2003
    does the lb have the fender tone stack? the demo videos show that with all the tone controls on 0 then no sound will pass. is this the case with the fender stack?
  9. Yep that is the case with the LB30 controls. All off = no sound.
    I'd too, think it was the LB30 I overdriving.
  10. shwashwa


    Aug 30, 2003
    so then it is not the fender tone stack? i have a fender bassman 100t and with all the tone controls down you still get sound
  11. waltdogg


    May 24, 2014
    Fender tone stack = mids flat @ 10, bass and treble flat @ 2. Meaning you can only cut mids and boost (with little cut) your treble and bass.
  12. If the distortion sounded really bad, sharp, gritty and course un-musical congrats. You just experienced over-saturation of the output transformer. Worse kind of distortion ever, I would rather hear speakers with rubbing voice coils.
  13. Mr. Foxen

    Mr. Foxen Commercial User

    Jul 24, 2009
    Bristol, UK
    Amp tinkerer at Ampstack
    Transformer saturating sounds like square wave.
  14. two fingers

    two fingers Opinionated blowhard. But not mad about it. Gold Supporting Member

    Feb 7, 2005
    Eastern NC USA
    Almost a year old thread. OP already sold the head.
    S-Bigbottom likes this.
  15. shwashwa


    Aug 30, 2003
    i this already, have you read what my actual question is? does the lb 30 have a fender tone stack. there are threads and threads that say yes, but because of the nature of the tone controls, the fact that no sound passes with them all on zero, i'd say no, and i tested it with my fender, and it doesn not behave the way the lb 30 does.