JHS Pedals Passive Pedal Little Black Amp Box Attenuator-Style ()

If your amp has an effects loop Send/Return jack, connect SEND to the input and RETURN to the output. Use the LittleBlackAmpBox with a saturated preamp section to get tube-driven tone at bedroom volume. No adapter (power supply) is required for the pedal to operate. Dimensions: 91.5mm x 38.1mm x 25.4mm