DO NOT GUT THAT PREAMP!!!!! with the switches in the center position you should get a fairly midrangy tone that will bring you out in a band setting. keep the bass turned down a little as it eats amp watts, and will make you lose clarity unless your rig is very capable of handling a broad frequescy spectrum ( i.e. 3 way cab)
The trick is to get a midgrange frequency that gets you through the dinn of other instruments then gradually bring inthe bass and treble frequescies to round out your sound. it is very common to love the sound of a growler alone , but unless your familiar with how to EQ it in a band situation it can become frustrating. Understand, the 3 separate preamps in your growler are irreplacable, and if you want a different sound with a growler body, trade up to a current version with a standard humbucker ans 3 band EQ. ( No switches) It should play the same as your current model, but provide a more traditional sound.
Tobias Growler 5
Squier Vintage Modified Fretless
Its all about the groove son...not the chops. ..pb