U-Sound Growl Box



The "Growl Box" distortion pedal was designed for the guitar-players of various styles from blues to brutal metal. The tone is flexible and can be very melodic for solos and tight for aggressive riffs. The pedal has a solid vintage "filling" and a master-made circuit making its sound easy-to-hear in any mix. The controls are the 3-band active EQ (Bass, Treble, Mid), Contour (mid freq filter), Dist (distortion level) and Volume. The mid freq control can be adjusted (on circuit board) individually.


  • The pedal gets powered by either a 9V battery or a stabilized adapter. True bypass.
  • Dimensions: 115x90x40 mm
  • Weight: 450 g


  • Distortion - distortion level
  • Volume - output level
  • Bass - low freq level
  • Treble - high freq level
  • Mid - mid freq level
  • Contour - mid freq filter

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