The razor Series of amplifiers from Power Acoustik Pack huge amount of power into small chassis thanks to efficient full-range class d topology and smt technology. Complemented with every possible preamp adjustment, the razor amplifiers leave nothing to be desired! the Compact 4.75" wide chassis allows mounting in very small places where other amps just will not fit. The rz1‐3500d is a monoblock amp, with 3,500-watts Max. Rms at 4Ω is 900 Watts x 1. Overall dimensions are 1.63"H x 4.75"W x 12.25"D.