Bowers & Wilkins ISW-4 Owner's Manual page 108

Amplifier functions
Amplifier power output
Consumption (1/8)
104
SA250
Description Dedicated Inwall Subwoofer rack-mount single channel 250W amplifier
Front panel controls:
Rotary volume (line in)
Rotary low-pass filter frequency (4th-order Linkwitz, 40Hz - 140Hz)
Low-pass filter defeat 2-position switch
Phase 0/180 2-position switch
Bass extension 3-position switch
Movie/music EQ 2-position switch
On/auto/standby 3-position switch
Status LED
Fault LED
Amplifier inputs Line In (XLR & RCA Phono)
1x RCA phono socket, line in
1x 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 equalization movie/music
Amplifier outputs 1x Speakon 4-pole speaker socket
2x pair of Binding Posts
250W
Input impedance 33kΩ
Signal / noise >80dB
Rated power 95W
30W - Idling
3W - Standby
Dimensions Height:
Width:
Depth:
Front panel Height: 2U 88.1mm/3.5 in
Net weight 5.4kg (11.9 lb)
Finish Black
SA250
100mm (3.9 in) [88.5mm (3.5 in) plus feet]
430mm (16.9 in)
322mm (12.7 in)