Without going into a super long story about what happened, I ran my Alpine CDE-164BT head unit while it was hooked up to the stock Bose speakers in my 2002 Nissan Maxima. I found out after having them hooked up for about a month and listening to music super loud that they are 1ohm speakers and could potentially damage the head unit. The shop that installed it MAY have installed it correctly but a lot of signs point to them bypassing the factory amp and just hooking up the 1ohm speakers directly to the head unit. Once I found that out I stopped listening to music altogether or listened to it very quietly.
That being said, all I want to know is this:
I could care less if I damaged the internal amp of the head unit, all I care about is if there is ANY potential that I damaged something within the head unit that would effect sound quality once I hook it up to an external 4-way amp. Is the ONLY thing that could have potentially been damaged the internal amp? Or is there a chance running them as loud and for as long as I did for that month may have damaged some other part of the head unit, internal or even external like the outputs?
Is there such thing as a head unit it being "slightly damaged" or is it one of those "it's either working correctly or it's not turning on, there's no in between" types of things?
I really appreciate your help, it will bring me peace of mind to know whether or not I should just replace it or if I should be good to go!