Sorry I’ve realised I didn’t phrase this as a question in my last post but there was a question, if anyone knows – would the amplifier unit I already have from a BC8500 fit into the BC9000 as a straight swap? It looks like it would but I don’t want to risk it and then see smoke coming out of it!
Although the amp is out of a broken BC8500, the amp (and speaker outputs) were definitely fully working, including the mute relay.