If the function is not on the original device, then you would have to use a discrete code, if there is one.
I have looked at the discrete codes available, and didn’t find one for subwoofer volume, so you may not be able to control that.
There is an advanced code for speaker on/off, which is 098.
Click here to learn about discrete codes. This message was edited by Ron Aronson on 06/02/04 12:17.