I've found a bypass cable that according to crunchfield website will work in my 2004 Prius with JBL audio system. Metra 70-8117 Has anyone used this solution? It seems like a reasonable way to use better quality amps in aftermarket audio systems. I read about TYTO-01 but I'd rather bypass factory amp.
What about crossovers for 9 speakers? Aftermarket radios usually have 4 speaker outs with full frequency bandwidth. This harness is not dividing the frequencies to all 9 speakers, is it?
the door speakers are passively crossed over. If the 9th speaker is the one in the dash, yeah, you're gonna lose that.
I wouldn't mind loosing the middle speaker. The wiring diagram from this thread: JBL amp wiring in Prius 2005, 86280-0W240 | PriusChat shows that there are separate outputs for front tweeters and front woofers.