1000w Amps cutting out on me....HELP!!

I thought this was funny.... It plainly shows that the amp has (1) x 25amp fuse. So Since I havent seen Watts=Volts x Amps. I thought I would also bring it up. 25a x 12.5volts (average power) = 312.50 watts Not 1000w that they claim.

Very typical of cheap amps

And yes I'm a newbie, and if there were more than ten posts in a category I might not have to revive old ones lol

just my 2 cents some mono amps are built to be bridged at the amp ,"Bridging" an amp means combining two channels into a single channel for more power. A mono amp, by definition, only has a single channel to begin with, so you can't bridge it. Some mono amps have two sets of speaker terminals, but they're still both connected to the same output. i had 6 xtant amps and i could wire them up right at the amp and change impedance not arguing either just trying to help on info

ok......

first ... MAX POWER ONLY MEANS THAT AMOUNT OF POWER FOR 1/1000TH OF A SECOND. TO GET POWER YOU NEED VOLTAGE. the voltage in a 90 corolla is probably only 55amps at the alternator. and the car probably uses 45-50amp constantly. which only leaves 5-10 amps of play room. if you honestly want to add that kind of power (over 300-400 watts which is needed to push a 15" sub) you would need to either add a battery or two, and get an alternator upgrade, and battery isolator to charge the second battery.

second.... bridging only means (at the amp) it is changing the amount of available outputs on the amp from (4 to 3) (4 to 2) (2 to 1) etc.

when changing the ohm load of speakers you are either running them in parallel (lowering impedanceby going pos. to pos. and neg. to neg) or running them in series (raising impedance by going pos. speaker a to amp, neg speaker a to pos. speaker b, neg speaker b to amp)

you can series/parallel speakers to get the desired ohm load you are looking for to push the amp as hard as it is designed to go or harder. you can't bridge a MONO amp (mono means one) how can you got from one channel to 1/2 channel???? yes most mono amps are designed to make the amp push the most power just by changing the impedance of the ohm load of the speakers.

my thoughts on the original question are as follows:

you lack sufficient power to properly run the amp. that is the reason your amp keeps cutting off. it doesn't have enough voltage to keep itself going. change the ground wire to 4ga and run it less than 3 feet from the amp. if you add a second battery to your system, then ground that battery no more than 3 feet from where you place it. changing your ground does nothing but wastes your time because you aren't fixing the problem, you are moving the amp but keeping everything else the same. everytime you change your ground you are also running a greater risk of introducing radiated noise into the system (alternator whine). find a good spot to ground the amp and do it. check voltage at the main battery with car on and system hitting (probably will read 11volts maybe more maybe less) then check voltage at the amp(will read 11 volts then steadily decline) check voltage at amp once amp cuts off (should read less than 10 volts.)

eureka you have solved your problem....NOT ENOUGH POWER.....

THATS MY .02

jeremy

All 22's is dead on. The battery can only supply so much power and you are sucking power faster than the alternator can keep up. At idle you only get about half the output. Your sucking the guts out of the battery. Upgrade the alternator and add more batteries. A lightening cap will help store energy for loud bursts, but for sustained volume you need voltage.

"She needs more power capt'n!!!"

You guys don't know what your talking about. You can run as much power as you want without the engine even running, it will just kill your battery. His problem is NOT the alternator, it is the impedence (resistance or ohms) that the sub is running on the amp. If it was the alternator, his truck would no longer start

dead on mikey i ran 4 15s in my buick for a year almost 4000watts of power on stock 70 amp alt and a 800cca battery and a 3 farad cap your amp is not gonna cut off because your alt doesnt have enough output it will just suck off the battery some more but a amp will not cut off cause of ur alt not being a high output just needs a bigger ground and fix the ohm problem just my 2cents

wow wild this post is back up kinda. well maybe i should get the sub out and try and get it pumping now. so far from my quick glance. i need a bigger ground wire. and to do some testing. and i wired the amp/ sub up before as the diagram showed. it told me to bridge it and such. thanks for the help.

WHAT THE FUCK is going on in here?
all of this talk makes my head hurt LOL.

few reasons why its cutting out....impedence is too low. bad ground. voltage. bad amp.
is the amp super hot when it shuts off? getting a DMM digital multimeter would help out in the future big time one of the best tools to have. its a must. have you tested voltage when the amp is playing? they will usually go into protect at around 10 volts. how fast does the amp turn back on?

ill ask a few more questions in a sec lol. i didnt read all the posts either. has this issue been solved?

p.s. check your grounds maybe one is loose