Aral Solutions Sub-Woofer ORBIT 851

[Pingrs]

Not sure if SS or Speaker section for this, but here goes.

This is a home theatre active sub-woofer with interfield amps?, belonging to my son-in-law. The remote control is missing, which renders the whole thing useless, since this is apparently the only way to switch it from standby, and activate the control logic.
Does anybody know how a generic control might be programmed to perform these control procedures, or how I might hard wire a fix. A schematic would be useful.

Thanks in advance,

Brian.