This is an excellent Guitar /Bass Preamp that sounds great and has all the features you may ever need.
We have used it for Double bass, acoustic bass and electric bass ad the results have always been great.
It will handle just about any signal from all kinds of pickups including ultra high impedance Piezos.
Class-A preamp, tone shaping: 5-band eq with sweepable mid, adjustable low-cut filter, feedback control: sweepable notch filter and phase invert switch, balanced XLR DI out with pre/post EQ switch, integrated chromatic tuner.
There's a handy FX loop for you to hook all your pedals while keeping the integrity of your signal intact.
Mute and Boost (up to +12dB) switches. Volume contol for the 1/$" jack output (for your amp). There's even an excellent Compressor that sounds surprisingly good.
Power: 9V battery or optional power supply (not included)