Introducing the remarkable NHT iWS inwall subwoofer. The iWS delivers bass performance previously attainable only with freestanding subwoofers, from a compact enclosure that fits perfectly in a standard residential wall. NHT engineers have designed a unique 12`, flat woofer incorporating an aluminum cone that acts as a heat sink, reducing potential distortion and resulting in high output with bass response to 27Hz. The iWS cabinet is made from 3/8` MDF laminated on both sides with 1/8` aluminum, providing incredible rigidity while keeping the depth of the enclosure to less than 3 1/2`. Subwoofer enclosure must be used with NHT Evolution A1 Amplifier & X1 Crossover (sold separately)