While the Dusty Harp Pickup works well in most situations without a preamp, with some amplifiers you can get a bigger and better sound by using one. Besides boosting the amount of signal going to the amplifier, the preamp will also provide volume and tone controls at your fingertips. The L.R. Baggs Gigpro preamp is a nice, compact size and sounds great. It has volume, tone, input and gain controls and comes with a belt clip. It has 1/4" input and output jacks for connection to any amplifier. Requires a 9-volt battery.