electric  double bass  for use in the song  Unintended . He favoured the  Ampeg  SVT amps, with 1x18, 2x10 and 2x12 cabs. Wolstenholme often uses  distortion . Favouring the Russian Sovtek version of the  Electro Harmonix   Big Muff  distortion / sustainer, this was used alongside a BOSS   Bass  overdrive