The 520 Watt Class D HRSIW8AMP amplifier is specifically designed to supply speaker-level power to the Sunfire HRSIW8 in-wall subwoofer to produce stunning low frequency effects for your home theater. A 520 Watt Vibration-Free Performance Statement Designed Exclusively for In-Wall Applications. Powerful. Thoughtful. Formidable. That best describes the new Sunfire In-Wall 8 Subwoofer System. Wrapped in a cabinet so thin and sophisticated that you can use every one of those Watts with virtually no mechanical vibration whatsoever. Bass performance that can play your movies music and games with the kind of accurate reproduction that shows no favoritism. A Credit Card Sized Remote Control with One-Button Pre-Programmed Sound Modes is included.  The HRS-IW8 Amp boasts 520 Watts RMS of power can drive two of the HRS-IW8 Cabinets and includes the science of Sunfires Frequency Filtration Design (FFD) for detailed fidelity playback for all source content.