This is a faulty Amplifier plate for B&W Bowers & Wilkins ASW 1000 Subwoofer.

It turns on with green light, but there is no sound from the speaker once connected, therefore I replaced the whole plate in my subwoofer rather than getting this one fixed.

This may be an easy fix: first it started working on and off for a few weeks. Then it just went completely to No Sound. Could be a simple Capacitor replacement but I am not sure.

When it worked:

The 12-driver size of this cube-shaped subwoofer delivers powerful bass and can be connected through stereo L/R RCA audio inputs. The ASW 1000 model has a connectivity of wired and can be used as a unit with a system configuration of 1 + subwoofer.