thanks! if it helps this is from the manual
Most competing subwoofers use Class D switching amplifiers due to their low cost, light weight, and high efficiency. However, in side-by-side listening tests against Class A/AB High Current amplifiers, the Class D switching amps do not have the depth or heavy impact of the traditional High Current Class A/AB amps. For this reason, we have engineered a 600 watt (into 2 ohms) Class A/AB High Current amplifier with 900 watts of peak power available. The huge transformer and large filter capacitors enable the bank of high current transistors to put out enormous peaks without distortion (0.08%
Naturally, all of the necessary controls and inputs/outputs are provided, as well as a removable IEC power cord and 117V/230V switch.
The VR-S/3 can be successfully integrated with any fast speaker, including electrostatic and mini speakers, without a trace of hangover or mud. Drum rolls and acoustic bass will have that extra definition heard in real life but not often experienced with subwoofers of lesser pedigree, and even the grand piano’s distinctive bell-like clarity on the bottom keys will not be marred! This is truly a reference product for either music or film sources.