amp problems

[bates]

ok warm weather again, that means my amp is goin to screw up some more... i think the problem is i need a cap, tell me if im right...heres what happens. in any song with bass, i turn it up nice and loud, it goes for a bit cuts out, then comes on, and cuts out, and repeats the cycle till i turn it down, and then it will start again, so i have to turn it down more and more .....and quite music makes me saaaaaaaaaaaaaad

 

[Heath]

Sounds to me like your amp is getting hot and going into protection mode... Try cooling the amps with some small fans, or get a different amp...

 

[member02]

what amp is this?

is it getting ventilation?

 

[bates]

it should be getting ventilation, its mountd to the back of my back seat. its a crappy alpine 5-channel, an mfh-255 or something like that. i had guessed maybe protection mode too, but i can literally make it cut out in a sec with bass at full, full volume and a bass tester. so can it get too hot that fast??

 

[XplorerKid]

thats the same thing my Amp does ( srry sony ) and it cuts out at high bass and cranked up..........

i think its not gettingthe need power or somthing
does yours have the right size wire ??


PEACE

 

[member02]

What sub do you have hooked up to that old alpine? I'm going to check impendence abilities of the amp

 

[bates]

ya im really stretching its limits, i hooked up 2 mtx 6000s, 10s, in parallel, so its running a 2 ohm load.

xplorerkid, i think i have 10 gauge wire on it for power.

 

[Heath]

Sounds like you need a new amp... Or service to the old one... You can get a JBL 600.1 that will put out 600 watts @ 2 ohms for under $250 shipped...

 

[member02]

Originally posted by bates
ya im really stretching its limits, i hooked up 2 mtx 6000s, 10s, in parallel, so its running a 2 ohm load.

xplorerkid, i think i have 10 gauge wire on it for power.

tell me how you managed to hook up two speakers to 5 channels, lol...

or if you only used 4 channels bridged, that amp cannot handle 2ohm bridged, that's your problem, surprised the amp isn't fried.

 

[bates]

ya i could do that, but a)im cheap b)im poor) and c) its ot worth it for the tim eim gonna have the x, im getting rid of it in like 5-6 months cause im goin to university, so i was hoping for a cheap fix, or maybe just settle for kowing whatthe problem is...... o well, Thanks for all the help guys!!

i owe you a beer

 

[bates]

ya im beatin the crap out of it really, so i shouldnt complain, but i hooked up the 2 10s in parallel to the one sub channel, then have the other 4 channels hooked up to 4 speakers...its a trooper man! thats why i like alpine! most people dont believe that each sub is only gettin 80 watts at 2 ohms when they hear it tho....

 

[member02]

oh, I wasn't thinking, the 5th channel is for the subs, makes sense.


lemme check that thing again. I cannot find it, you sure that is the serial number? sounds like a powerful old little amp, try and look at the gain knob, and tell us where it is set, another thing, what head unit do you have?

 

[bates]

ok its actually an MRH-F255 alpine. my deck is an old clarion drx6174. and man i have found the problem, seems i forgot that when i originally set my gain, as i rmember i didnt know what was high and what was low, so i set it to what sounded good, MISTAKE! wow, it was set to 3 on front, rear and sub! i should turn it down i think......

 

[member02]

lol, let us know if it helps turning down the gains

 

[xtreme00ryda]

i have the same problem with my lanzar vibe 250, it cuts out ive heard a couple different things from different ppl, spreading ur grounds out in different places, i have a chassis ground how much better ground can u get, right now i took all my **** out and one more thing when im running it hard for a while sometime it doesnt cut out put it kills my battery i have a 1 farad lighting audio capcitor and just bought a new battery with 1000 cranking and 875 cold cranking, my truck starts up real bad, barely makes it to idle sometimes just stalls...lemme know

 

[bates]

ok well i turned the gain down and now its way louder than before, so i obviously need to do some tuning with it, on monday im gonna get the multimeter out nd do some testing with it, then im gonna do some high volume tuning.