The DD monoblock amplifiers are available in CM, M and SS Series. The CM Series are our highest power to cost ratio amplifiers and feature class AB output sections. The SS1b, M1c and M2b amps are our newest generation class D monoblocks with compacted PCB layouts, small footprints with big power . The M3a and M4a round out the lineup with heavy hitting power - up to 20,000 Watts coming from a strapped pair. There is a DD monoblock for virtually every application.