Not sure where this goes - repair, or something else?

[BreakingBad]

This isn't a noob here, but I def can't say I know everything about car audio.

I have a MechMan H/O alternator, with an optima under the hood and some g31 batteries in the rear.

I was on my way to work, everything fine, and right before i reached work Gorilla Zoe's "It's Christmas" came on, and INSTANTLY...the battery light came on, and my voltage went from hovering around 14 down to ~12ish. Took to advanced auto, they say the no load/load is 12 volts, and it's the alternator.

My question - would this make sense that an alternator would go instantly like that upon bass being played, or does it sound like possibly the bass 'loosed' up some sort of connection somewhere? I wouldnt obviously put it past the alternator, but the ****ed up part is it's 3 months out of warranty and JUST then, goes bad (and i have to pay for the repairs)

Test results from advanced auto:

Good Battery

Voltage: 12.47V

Measured: 960CCA

Rated: 750 CCA

Temp: 42F

Charging System Test

NO VOLTAGE

No Load: 12.07V/0.0A

Load: 12.07V/0.0A

My car starts, runs, with everything off - defrosters, vents, head unit, everything.

I find it very odd that all of a sudden, during one bass drop, the alternator dies/ceases to work. Obviously it can happen, i just want to make sure replacing that is the way to go. All visible connections are tight in the rear and under the hood....just want to rule out EVERYTHING before i take it in 8am for the stock alt to get put back in...i would assume then either internal issue with alt, or voltage regulator, etc

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[assassyn 10+ year member]

I have had my alt just drop right out on a big bass note

 

[BreakingBad]

Very odd for that to happen all of a sudden, the alt is only a year old and i've played the same song numerous times, at higher volumes (20, 22) while i was only at 12 or 14 when this happened. I can see it being a possibility, but i guess i was seeing if there were any possibilities of issues that wouldnt require repair of the alternator (ive had situations arise where someone said "dont do that, its as simple as this yada yada) and give me a quick and sometimes overlooked solution.

I have a good feeling it needs repaired, but thats shotty quality of an alternator if it works fine for a year, never abused, still never abused, and just dies...3 batteries....that shit had an easy ride...