Bowers & Wilkins SA250 MK2 Subwoofer Amplifier is specifically designed for Custom Installation In-wall subwoofers, the ISW-3 and ISW-4. Deceptively slim at 89 mm, and weighing 5.4 Kg, it provides 250 Watts of power. The SA250 Mk2's equalization is custom-tailored to the In-wall subwoofers, with a two-position EQ switch to select between the ISW-3 and ISW-4. Warranty 1-year manufacturer's warranty Key Features: Rack mount amplifier for custom installation In-wall subwoofers 250W Class D amplifier Two-position EQ switch Technical Specifications Description 250W rack-mount amplifier with builtin subwoofer equalisation Amplifier Inputs - 2x RCA Phono socket, line in- 2x RCA Phono socket, link out- 1x XLR socket, line in- 1x XLR socket, link out- 3.5mm jack - 12V trigger on/standby(overrides manual standby setting)- 3.5mm jack - 12V trigger equalisationmovie/music Amplifier outputs - 1x Neutrik® Speakon® 4-pole speaker socket- 2x pairs of Binding Posts Amplifier power output 250 Watts Input impedance 33kΩ Signal / noise >80dB Rated power consumption 95W – 1/8 full power30W – Idling Dimensions Height: 100mm (3.9 in) [88.5mm (3.5 in) plus feet]Width: 430mm (16.9 in)Depth: 322mm (12.7 in)Front panel Height: 2U 88.1mm/3.5 in Net Weight 5.4kg (11.9 lb) Finish Black