joshrobb08tc

im not saying that i know everything what im saying is that if the kid is asking how to wire up a computer fan to his amp then hes probley not running a amp that can handle a low ohm load so i said he should go over his work and make sure its wired corectly before he goes and starts this big project....... i took alook at your profile and if your hittn 141 db then you def know what your doing.... i agree with you but in this case its probley just the wireing

Tcguy85

it may not be his wiring. like trials has said, certain amps just run hot. my old rockford amps needed fans on them or they would get very very hot and sometimes shut off, and i was running them at an ohm load the amp was rated at. even my expensive Digital Designs amps get quite hot and i am pushing the right ohm loads.

Dr_Isotope

iTrader: (1)

I'm running very low gain settings and relatively high impedance (2ohm for the subs, 4ohm for the comps), and both of my amps (Infinity Reference) get into the 130ºs under normal operation. That's too hot to touch for an extended period, so I have a fan setup for them-- even if wired "properly", an amp in an enclosed space has a 50/50 chance of overheating if you drive it hard. If it can't exchange heat into the air fast enough, it's gonna overheat.

tc-guy

just like some people say some amps just run hot period. it doesn't matter as long as the amp doesn't go into protection mode it should be fine. in my old set up when i had fans on it i found that it was better to put the amps in an enclosed rack and put two sets of fans on it (one on each side. one to draw air in and one to blow out.) when i didn't do that the airflow from the fans didn't really flow over the amps heatsinks like they were supposed to and my amps still overheated and went into protect mode. u should use the radio's remote wire hook up into a relay to switch the fans on and off.

scl0n

I have a Rockford Fosgate 700S amp. im running two 10" alpine type R's DVC 4ohm coils and i have them wired in series if i remember correctly. ( so i guess each sub is at 8 phm load?) i dont have the amp bridged, im using both channels, one for each sub. Sometimes after listening to it loud for about an hour straight it will completely shut off. Thanks for the help

tc-guy

hhhmm. that doesn't make sense. even a cheapy amp is 2 ohm stable in stereo mode. and if each sub is 8 ohms that definitely won't make the amp over heat. why don't you try to bridge your amp and put the two 8 ohm subs in parallel and see if it works better that way.

scl0n

i might be running them in parallel, i have to take them out to check... but is that going to make them louder or not as loud if i have them at 2 ohm vs 8 ohm? they whole ohm thing confuses the crap out of me haha

tc-guy

well even if your subs were in 2ohm mode your amp should still not overheat in stereo mode. it would only over heat if the subs were 2 ohms each wired together in parallel in bridge mode. that would be a 1 ohm load but in bridge mode the amp will see it as a .5ohm load.

quick ohm lesson.

4 ohm load + 4 ohm load = 8 ohms (in series) basically 4x2
4 ohm load + 4 ohm load = 2 ohms (in parallel) basically 4/2

8 ohm load + 8 ohm load = 16 ohms (in series)
8 ohm load + 8 ohm load = 4 ohms (in parallel)

i would check to see how your subs are wired by themselves first. like i said tho, your amp shouldn't over heat in stereo mode no matter what.

Tcguy85

the rockford at 2 ohm stereo could still get hot enough to go into protect. i had two rockford amps that were 2 ohm stable and both would get really hot and shut off. i took care of the problem by blowing a computer fan on each.

tc-guy

maybe its a rockford thing. every amp i had never had problems overheating in stereo mode only bridge mode. last rockford amp i had was the ooooollllllldddddd punch 40's. those amps where the ****.