decade biamp function allows the use of a second amplifier or active subwoofer ... preout 1 and offers a high pass filter function on preout 2 with selectable ... options these are analog 2nd order filters configured around the low impedance ... differential class a output stage of the preamp this output stage also ... even at elevated levels is the hallmark of the powerdrive amplifier the m3 ... /noise ratio ref rated power physical specifications dimensions w xhxd net weight shipping ... regulated supplies for different stages of the 2 channels the custom wound ... current rectifiers feed low esr 105c filtercapacitors nad s powerdrive technology ... all levels by utilizing small amounts of feedback the circuit returns distortion ... audible frequencies that are at limit of measurement less than 0.002 the ...