Fishman PRO-EQ Platinum Preamp/EQ/DI Four-band EQ with sweep able midrange precisely shapes and sculpts bass tone Feedback-fighting notch filter &amp; Feedback-fighting phase switch Smooth control- Fishman's exclusive compression smooth's out amplified acoustics Input gain and master volume controls XLR D.I. (with ground lift and pre/post switches) for pro-sound and recording Stompbox sized package,Smooth control Control and eliminate feedback 4 band,Easy access battery compartment