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run 2 of them in my daily driver. They have zero, read ZERO protection on them. If they get too hot, consider them dead. Run below 4 ohms bridged....dead. Ya get the idea.
I've had mine going daily for 2 years, with no problems. I do have a larger alt, and extra batteries to rin them as well.
4000 watts at burp, no doubt, but they do get power hungry. I have a 200 amp fuse on each of mine with no prob.
Good amps, great size, and US Amps quality.
That is an older US, which only had one line at the time (well kinda USA low ohm and US Xterminator high ohm) , and it was, and is, billy bada55.
The X means it will make its most power at 4ohm.
It should do 4k if fed well. I could never do so with one batt.
16v is not required, stable voltage is.
Not a daily amp. Some do, but they run hotter than h3ll when pushed.
Ive owned a couple.
we have a guy running one here daily with no problems, that little thing's a damn beast. I'm not going to say he beats on it constantly though. 2 guys here still use them in competition, in NSPL classes, because last year the fuse rating had to be 150 or less, and it has a 120 amp fuse rating. Guy with one of them hit 148.xx yesterday on 2 12's, and could have been a bit louder, but they couldn't get his cd player to quit skipping.
During testing, the 4000x was .7 louder than a DD M3
The 4000X cannot play more than 5 minutes continiously... Don't use it for daily unless USAMPS experts say you can.When we bought them Jack Matheny specificaly noted that these amps were not for daily use...
It was a little beast when it was first released...Regardless of its size it's very strong...I used 2 of them on 2 15'' MTs in a street C (160 lt net ported enclosure setup 3 years ago.
Max score 152,6 dbs on a single Optima bluetop and only 1 0gauge power wire.on my Peugeot 106
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