I've read some stuff here that when upgrading various things, sometimes the air bag deploys? What's up with that?! I am replacing stock speakers (great instructions on this site - with pics!) so I assume I need to disconnect battery, maybe some fuses? What is the routine as far as reconnecting every...

OK, I did some research on 2-ohm vs. 4-ohm, and Jahntassa is right: running 2-ohms on a 4-ohm head unit could damage it. Whoda thunkit? Anyway, 2 more questions:1. Are you sure stock head unit is 4-ohm?2. What do I need to disconnect before putting speakers in? I've read that something can set off t...

Good point, I had not thought of the sound being muffled. That's kinda what the stock speakers sound like! I was also worried about rain and snow touching the speakers. If I decide to cut the grills, what's the best way to cut them? I have a Dremel tool, I guess a "circular sawblade" type ...

Hello all: I recently bought an 06 Matrix with the 4 speaker setup. Want to replace all 4 speakers with 2-or-3-ways(using stock head unit), and have read the VERY excellent installation instructions by cohocarl... nice. Anyway, I think I want Kappa 652.7i fronts, Kappa 527i rears (2 ohms & 95db ...