Guess you need something to do lol! I’ve been trying to get to some of my audio projects but my wife keeps moving stuff to the top of my list. Ugh...
FWIW, I’m not sure if what you want to do will be successful. Not knowing the speaker load as is would make it impossible to know what kind of load it would present to the amp, and you might be asking for trouble. OTOH, maybe you DO know all that stuff and you should proceed and get it off the list. Lol.
I honestly just think it will cause more problems than it solves. Even if the load isn’t that great, you might end up with lobing issues and timbre mismatch. More-so, I just don’t think the pinnacle will have near the dynamic range, or the sound quality. Maybe go to parts express and get some parts and make it a BT speaker or something? I just don’t think it’s a useful speaker except for a science experiment.