See nothing, hear everything Bass is a vital element in our enjoyment of sound. It’s true for both music and movies, and it’s as true for custom installation as it is for an audiophile’s two-channel hi-fi. The ISW-3 is an incredibly versatile and compact in-wall and in-ceiling subwoofer, capable of providing high-quality bass output in spaces that may have previously missed out on this vital element, including kitchen cabinets! Its balanced design, featuring 2 x 6.5in drivers, means that it can be placed in a variety of locations without causing vibrations. Powered by a separate audiophile-standard 250W Class D amplifier the SA250 Mk2, the system keeps its cool even when you listening to demanding movie soundtracks at high volume. Technical Specifications Drive units: 2 x 165mm (6.5in) Paper/Kevlar® cone Frequency range: -6dB at 21Hz and 222Hz adjustable (EQ at A) Frequency response: ±3dB 27Hz - 120Hz adjustable (EQ at A) Bass extension: -6dB at 21Hz (position A) -6dB at 25Hz (position B) -6dB at 29Hz (position C) Maximun Amp Power: 250W Impedance Nominal: 8Ω (minimum 6.3Ω) Dimensions: Width: 330mm (13in) Length: 470mm (18.5in) Depth: 235mm (9.25in) Net weight: 12.5kg Electronics (mandatory) : SA250 Mk2