The Behringer PB100 Preamp Booster pumps up the volume of whatever you plug into it. It excels at matching piezo pickups to amplifier inputs. Bass and treble controls give you one more opportunity to shape your sound on its way to the amp. The variable gain lets you "warm up" your signal as much or as little as you want, with smooth, even overtones. 

Use it as a solo boost or to fatten a bass tone. Quality electronics yield a quiet boost with no loss of signal integrity and completely silent operation.

Adjustable Gain

You can use this preamp to match your output to your amp's input or as a gain boost that's perfect for soloing. Quality Electronics The hisses and pops common to boosted signals are not a problem with the PB100.