Spector Euro 4LX, EMG P4+Jr, Spector Tonepump - Boosted by firebrain published on 2021-10-24T14:40:38Z This playlist showcases the Spector Tonepump preamp (also know as Michalik BP-4) in a Spector Euro 4LX. The Spector's originally a TW model, the pickups have been replaced with 35P4 and 35J-R and is strung with DR DDT string 45-105. Wiring is done vol/vol/pre/out. When boosted, bass and treble are always boosted to 100%. entered means bass and treble controls are set in center. As there's no real center detent for the pots and the Tonepump works in non-linear fashion in terms of dB I just set them manually to center. Genre Technology