amp fans

[jellyfish420 10+ year member]

i was thinking of putting a fan or 2 on my amp, do i a) put the fans beside my amp to blow across the heat sink or b) take the top off and blow them directly in the inside of the amp on the circuits and the such. here is a pic of my amp, its under the driver seat. . . its harder to steal under there.

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[tristanlee85 10+ year member]

I don't know if I would take the top off and blow air right on it because if anyone was in the back seat, one small move of a foot and your amp could be screwed. I have my amp mounted in my trunk and here is how I have my fan:

 

[jellyfish420 10+ year member]

did you see the pic? what would you think of cutting holes it the plexiglass and srcrewing the fans on the top. maybe one intake, one exaust?

 

[tristanlee85 10+ year member]

Correct me if I'm wrong, but I think the only part of the amp that gets most of the heat is where the resistors are (as you can tell where my fan is located on my amp). I would cut a whole in the top for the fan to blow directly on the hottest part, and on the opposite end of the amp, cut a whole for the air to circulate.

 

[jellyfish420 10+ year member]

if resistors get the hottest then why aren't they bolted to the heat sink? wouldn't it be the transistors that get the hottest?

 

[tristanlee85 10+ year member]

Well, on my amp, the only part that gets hot is the big resistors you can see underneith the fan. The other side of the amp doesn't get hot. I don't know much about how reansistors work. I do know for a fact that resistors get hot (because I've even touched it) so I know that's one reason my amp's heatsink gets hot.

 

[jellyfish420 10+ year member]

the transistors are bolted to theheat sink to dissapate the heat. look at the top side of your amp. . . see them. ya the resistors get hot but they are made to, the transistors are the things that you haveto worry about keeing cool.

 

[tristanlee85 10+ year member]

Well' I've touched the transistors and they are no where near as hot as the resistors. Anyway, try like I said if you want. Put the fan in one side of the amp and a port on the other end to completely circulate the air. Backpreasure is kinda key here. 2 fans on the ends and a single whole in the middle would work as well because the air going into the amo would be forced out causing the circulation to be greater ina since. Plus, the amp isn't completely sealed off on the edges so that will help as well.

 

[jellyfish420 10+ year member]

the transistors don't get as hot because they're bolted to the heat sink to dissapate heat. have you ever touched the sides of your amp? alot of that heat is radiated out from the transistors that are bolted to it. transistor have to stay cool beccause they arewhat amplifies the signal,if they get hot they become less effective, the you get a distorted signal.

 

[supa_c 5,000+ posts]

the transistors are bolted to theheat sink to dissapate the heat. look at the top side of your amp. . . see them. ya the resistors get hot but they are made to, the transistors are the things that you haveto worry about keeing cool.

the transistors don't get as hot because they're bolted to the heat sink to dissapate heat. have you ever touched the sides of your amp? alot of that heat is radiated out from the transistors that are bolted to it. transistor have to stay cool beccause they arewhat amplifies the signal,if they get hot they become less effective, the you get a distorted signal.

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[tristanlee85 10+ year member]

I dunno. I'll check once I get my new sub. I've only touched the top of the amp and I can't even hold my hand on it it's so hot. I'll test the sides next time.