I'm sorry I no longer have mine. Maybe someone else can chime in. According to the photos I have there were 8 hex-socket head machine screws on the back and I'm pretty sure all 8 have to be removed, but maybe not. The 4 in the middle are for attaching the "clamp" so the speakers can be mounted on a pole. What about the knobs on front? Do they pull off? Maybe search "powered partners" in the AR forum, find members who have worked on them and send PMs. Here is a manual for the similar Advent 570 h