What in the world makes you think you are getting 4k out of that amp wired at 2 ohms and then saying the most you have ever clamped is 65-75 amps. You are seeing 1k watts...
This is why you keep telling people they don't need an HO alternator. You are running the power a stock electrical vehicle can handle.
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Me thinks you are taking this too personal.
At 2 ohms, the amp delivers approximately 2300 watts, and dynos up to 4k burst, so there is that.
As for the other. MOST people, yes even ones that think they want crazy a$$ shiz like those two drivers on a 5K system, rarely use it anywhere near the max potential - not cruising around anyway,
I qualify everything I advise on, if the OP thinks it doesn't apply to him, that's what the information is all about.
The truth is, adding an aftermarket Alt is not always a simple thing and much more often than not, a wasted endeavor in both time and money given the advancements in battery technology and the relative cost comparatively.
If you don't think that 75amp inside a car isn't loud at almost 112-118db, then homie, you've e been running too much power sitting inside your rig, maybe a bit longer than you should have been.
I don't come here to argue with people, get into pissing matches and confuse the OP's, just providing good solid advice on a regular basis for good measure, and it doesn't have to agree with anyone else, as long as it is sound advice, which it is (no pun intended)
As for clamping, was refereeing to daily use, not tests or competitions. I don't need to provide that I can push the system to close to 125db when I never am going to use it that loud.
Be kind of silly to claim I was clamping 250 amps with a couple of 600 watt RMS subs, right?
Even if I had a couple those subs, likely I would never ever push it to those levels; MOST people don't and that's the point I am making.
You do not have to agree, but it's not wrong because it doesn't comport with your perspective. Truth is, if he's got the big three done, and the GloweVoltage, if it turns out he needs more juice, great, have at it, any alt you want.
I never said you're wrong, I simply stated my perspective and approach, you on the other hand, by disparaging another, simply make matters worse, not better for anyone.
Give it a rest, nobody is the absolute authority on how people use their systems, so the OP can or should be able to make the decision based on good advice, either way.