The LR Baggs CTRL-X Preamp has an onboard mixer that combines with their X-Bridge for Strat-style. Now you can mix piezo acoustic guitar sounds with your electric guitar's passive magnetics. CTRL-X actually turns your guitar into a state-of-the-art acoustic/electric hybrid at a fraction of the usual cost. The CTRL-X preamp installs easily and unobtrusively under your guitar's pickguard in any standard Fender Strat. The LR Baggs CTRL-X preamp features a special replacement jack for mono/stereo output and on/off switching and push button select for mono or stereo operation. Match level with your existing magnetic pickups using the CTRL-X preamp's internal volume trim.