Designed to operate as a system with the HRSIW8AMP amplifier the HRSIW8CAB does its part with StillBass mechanical vibration elimination making it a perfect solution when seeking an in-wall subwoofer with the best performance characteristics possible. 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. What allows the Sunfire In-Wall 8 to rock your world without rocking your drywall and your familys nerves along with it? Its an exclusive Sunfire technology called StillBass. Originally designed for the unbridled power of the SubRosa StillBass allows Sunfire to pack more power and performance into our In-Wall subwoofers than any of those so-called competitive products. Now since the bass is what makes the biggest difference in your music movies and games— the In-Wall 8 System is a force youll delight reckoning with. Designed for easy retrofit mounting and the paintable removable grill attaches flush with magnets.