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Cooling a subwoofer plate amp?
Mechanix 
3/8/08 8:30:18 AM
Learner

What would be the best way to keep this sub amp cool...

http://www.jaycar.com.au/productView.asp?ID=AA0508&CATID=15&keywords=&SPECIAL=&fo

I was thinking maybe screwing a fan or 2 directly onto the heatsink?

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phate666 
3/8/08 8:38:18 AM
Master

An amp of that rating is going to generate some heat. That`s a given.

Is it cutting out?

Otherwise, as long as the fins are vertical and it`s well ventilated, convection will do it`s thing.

...or you could mount some fans to it.... :-)

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Beauty is in the eye of the beer holder.

Mechanix 
3/8/08 9:10:36 AM
Learner

Running 2x12" subs, it cuts out after a while. I actually had it mounted horizontally, until i mount it inside a jukebox cabinet...as in the pic below;

http://img171.imageshack.us/img171/4451/dscn0983ib9.jpg

I never even thought of the way it was sitting would effect the performance. So it would be alot better mounted with the fins vertical?

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stadl 
3/8/08 10:02:04 AM
SuperHero
Titan


Mounting it horizontally will affect the convection cooling efficiency.

Fans will improve the cooling - especially if ventilation is bad or room temperatures are high - anything beyond that may be encouraging use that is exceeding the design of the amp.

Do you know if the cutting out is heat or PSU related? If the power supply simply cannot keep up with the continuous demands, then cooling won't prevent PSU sagging and the unit cutting out.

It's worth considering that the thermal cutout is there to prevent something being damaged - damage that would happen after continuous operation above the level that triggers the thermal cutout.

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...so brilliant in fact, that by simply harnessing the power of one live frog, it.. it.. uhh.<poke> <poke>
World domination has encountered a momentary setback. Talk amongst yourselves.

Waffles, Lots of Waffles... And Chips...

Mechanix 
3/8/08 10:17:49 AM
Learner

I tried placing a pedistal fan next to the amp, and it ran perfectly. Didn't cut out. Without the fan the plate amp got too hot to touch even. So it wouldn't be a PSU issue.

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phate666 
3/8/08 10:28:35 AM
Master

How have you got the subs wired?

What is their individual ratings?

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Beauty is in the eye of the beer holder.

Mechanix 
3/8/08 12:27:27 PM
Apprentice

This is how the subs are wired...

http://akamaipix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/2DVC_4-ohm_mono.jpg

Here's the details for the subs...

http://www.subwoofer-builder.com/driver-CS-2279.htm

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-80 
3/8/08 12:50:07 PM
Banned

Use 1 or 2 120mm computer fans on it.

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Mercury - you've got my number

phate666 
3/8/08 3:00:03 PM
Master

Your 1st link shows the Subs wired in parallel, then the 2nd recommends 2 Subs in series for optimum performance for the 350 watt amp.

"Firstly, there are three ways to wire this driver - single coil of 4 ohms, utilsing the 240w amp, or both coils in series, giving 8ohms, which requires the larger 350w amp, or one coil driven with the second coil shorted using the 240w amp."

Any reasons why?

edit - Just realized they are dual-coil drivers, in essence you have 4 spkrs. Shame it`s Sunday and Beer o`clock.


Edited by phate666: 3/8/2008 3:06:49 PM

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Beauty is in the eye of the beer holder.

Mechanix 
4/8/08 9:02:07 PM
Apprentice

If I mount a fan to the amp heatsink, should it be forcing air onto the amp, or sucking it away?

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phate666 
4/8/08 10:56:03 PM
Master

Mechanix - Riddle me this :

By your avatar, the Castlemaine Chap, I`m guessing you are in QLD. It`s winter. Summer in the Ntrn States is Hot. You are adding fans in winter.

What will you do in December?

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Beauty is in the eye of the beer holder.

-80 
4/8/08 11:59:55 PM
Banned

Quote by Mechanix
If I mount a fan to the amp heatsink, should it be forcing air onto the amp, or sucking it away?



Force the air onto the heatsink.
Just like a CPU fan.

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Mercury - you've got my number

1bolHungLo 
5/8/08 1:01:41 AM
Immortal

*this calls for a water cooled subwoofer plate mod*

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Body like a popstar, face like a rockstar. -Me

"But the speed difference is something only the most anal-retentive performance freaks would notice... " donutking

-80 
5/8/08 7:30:59 AM
Banned

Quote by 1bolHungLo
*this calls for a water cooled subwoofer plate mod*


I don't think he needs to worry about fan noise with the power he has!

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Mercury - you've got my number

Mechanix 
5/8/08 9:44:02 AM
Apprentice

Quote by phate666
Mechanix - Riddle me this :

By your avatar, the Castlemaine Chap, I`m guessing you are in QLD. It`s winter. Summer in the Ntrn States is Hot. You are adding fans in winter.

What will you do in December?



Drink more beer because it's hotter?

Quote by 1bolHungLo
*this calls for a water cooled subwoofer plate mod*



LOL I have considered that.


Edited by Mechanix: 5/8/2008 9:44:34 AM

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kRaZeD_ 
5/8/08 5:08:48 PM
Guru

I have no idea why you need to add fans to THAT amp... Mine runs cool all the time, and I like my music loud... Maybe your subs just aren't very efficient...

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| E6600 @ 3.42Ghz | P5W DH Deluxe 1101 | 2Gb Corsair XMS2 PC-6400 Black | HD2900XT |

-80 
5/8/08 7:56:51 PM
Banned

Quote by kRaZeD_
I have no idea why you need to add fans to THAT amp... Mine runs cool all the time, and I like my music loud... Maybe your subs just aren't very efficient...


He said he has it in an enclosed Juke box.

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Mercury - you've got my number

Mechanix 
6/8/08 9:21:04 AM
Apprentice

Quote by -80
Quote by kRaZeD_
I have no idea why you need to add fans to THAT amp... Mine runs cool all the time, and I like my music loud... Maybe your subs just aren't very efficient...


He said he has it in an enclosed Juke box.



Havn't finished the cab yet so I have just had it sitting on a temp stand, see pic above.

I will try mounting it vertical, on the outside of the cabinet, without fans for a start. If it still over heats well I have have to figure out some sort of water cooling setup :p

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1bolHungLo 
7/8/08 7:19:42 PM
Immortal

Quote by -80
Quote by 1bolHungLo
*this calls for a water cooled subwoofer plate mod*


I don't think he needs to worry about fan noise with the power he has!



well water coolers are better than air coolers. So it may not necessarily for a noise thing. :P

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Body like a popstar, face like a rockstar. -Me

"But the speed difference is something only the most anal-retentive performance freaks would notice... " donutking

1bolHungLo 
7/8/08 7:22:19 PM
Immortal

apologies for the doubl post.


Edited by 1bolHungLo: 7/8/2008 7:47:04 PM

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Body like a popstar, face like a rockstar. -Me

"But the speed difference is something only the most anal-retentive performance freaks would notice... " donutking

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