movable booms

Discussion in 'Amps and Cabs [BG]' started by blunderbass, Mar 27, 2004.

  1. I play a Yamaha Attitude Special ('94) through a Yamaha 10" practice amp.
    At some places on the neck the sound is almost entirely 'boom' for one or two frets. This tends to be on the lower strings. The boom reappears an octave up on the next but one string.
    I can dial it out by using the equaliser on the amp, but it reappears at another place on the neck.
    I can't figure out if this is the amp, strings, or a duff neck.
    Would be grateful for any advice.
  2. JMX

    JMX Vorsprung durch Technik

    Sep 4, 2000
    Cologne, Germany
    Sounds like you're hitting a resonance frequency, most likelythat of the amp (housing). It reappeares at the octaves because that are overtones of the original frequency.
  3. Thanks.
    Anthing I can do about it?
    Fill it with concrete??!!
    I guess add rigidity to the cabinet in some way?
  4. You won't be able to stop the resonant frequency from occuring - That's a natural result of the amp/driver/cab/bass combination. The good news is that just about anything you do to the cab like bracing will have an effect on the woof tone. You won't get rid of it all but you might be able to bring it into line with the volume of other notes on the neck.

    There's lots better guys to answer this, so I'll pop it over to AMPS...