PREAMP PEDAL The Bass Butler is a complete bassist's kit in one pedal. By splitting the signal at the input, the Bass Butler presents two completely separate analog signal chains, in parallel, truly like a bi-amp rig. Channel 1 (always on): Bass Channel with adjustment for compression, bass, treble and volume. Channel 2 (switchable): Guitar Channel with adjustment for Gain, Bass, Middle, Treble and Volume. Each channel with balanced XLR DI output with simulated guitar and bass cab. Mix output without simulation. Expression pedal input. Ground switch. Power supply: 18 V DC transformer. Dimensions (W x H x D): 17.0 x 8.5 x 16.5 cm. Weight: 1.3kg. Made in UK.