Re: Power Protection, why?
For one, check and double check your ground. I had that amp before and it was absolutely the pickiest amp when it comes to a ground point that I have ever dealt with. In order to figure out the impedance thing, model numbers or voice coil configurations of both subs would be nice. All the Sony Xplod subs I've seen were single 4 ohm(not sure if they all are or not though). In the event that the Xplod is a single 4 ohm, and that was the only sub hooked up to the amp at the time, then low impedance was not your issue.
Also check the fuse near your battery to make sure it's not partially blown or something. What size power wire are you running. Forget about max power ratings, RMS is what matters, and even then, your equipment does not even do RMS power. The amp does a little over 400watts in my experience.
*Sundown Z15 *SAX-1200D *CDT HD-61A *SAX-100.4 *Pioneer DEH-80PRS *KnuKonceptz *XS Power D3400 *270A Mechman
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