BBE Acoustimax, Effects Pedal, Especially for the revaluation of acoustic instruments, The Acoustimax performs a phase correction between three frequency bands to compensate for phase and amplitude distortions in the loudspeaker, thus providing more clarity, 3-band EQ, Notch filter, Tuner output, Line out, FX, Pre / Post DI Box, Ground lift switch, Phase changeover switch, Pad switch, Hard-Wire Bypass, Incl. 12 Volt AC power supply