Crunch P1-600.4 75 x 4 @ 4 Ohms, 150 x 4 @ 2 Ohms - 2 x 300 @ 4 Ohms Four-Channel Powerone Amplifiers 4 x 75 W @ 4 Ohms, 4 x 150 W @ 2 Ohms, 2 x 300 W @ 4 Ohms Maxx Power Preamp level RCA inputs, high level inputs and daisy-chain line outputs Mono/stereo switch High-pass/low-pass/full-pass frequency selections Diagnostic LED power protection system warns and detects