DIY external cooling fan to amplifier-how to?

[jeremy]

Dear all,

i have a 4 channel amp. main problem is the built in fan isn't working anymore.. the amp heats up till like really hot during operation.

my idea is to DIY a fan mounted on the amp.(there's a small rectangular opening enough for air to enter or exit).

i have a 12V PC cooling fan.. i tried sourcing power from RCa cable input and then ground the other wire, but the fan not moving..

Any sifu please advice on where i can tap the power from? and of course the fan has to turn on together with the amp.

any advice most appreciated.:wavey:

 

[idnawse]

try use this

http://img337.imageshack.us/img337/6919/sfre.jpg

 

[jeremy]

my gawd, what are those 86,87,85,83? and where can i find those?

 

[idnawse]

that one relay la bro .. normally they use it for additional spotlite, horn etc

 

[jeremy]

oic..will go buy relay and connect as mentioned.thanks

 

[dieheartsue]

U can try tapping the positive terminal onto the amp positive (+) incoming power and the negative to the boday or any negative(-) source.. usually it works on all of my electronics installation inside my car...


.....dieheartsue....

 

[idnawse]

so the fan will on until ur battery flat? what i know, the +ve terminal at amp is direct current from battery. :hmmmm:

 

[dieheartsue]

yes.. but nowadays new connection is the amp power they tap through the radio power cable by adding in relay.. coz old fashion (battery tap in) the amp will never off.. if branded amp shud b ok.. if cap ayam brand not practicable.. u can oso tap to those postive (+) terminal which is connected to ur ignition switch.. u can try testing it by using the car power tester by touching the terminal and switch on your car key.. if when u switch off the ignition but still lighting which mean it does not pass by the ignition..


...dieheartsue...

 

[idnawse]

yup.. use from ACC switch is more suitable. need to long wire of coz la.

 

[minikar]

Wire the ON/OFF for relay from "Remote" should works for most amplifier... oh fan :)

 

[jeremy]

tried tapping direct from amp input and another wire grounded.. but fan not working

 

[minikar]

The "input", you mean the wire "(+) from battery" or "from head unit"?

 

[jeremy]

i tapped from (+) battery to amp.

 

[minikar]

Try substitute the fan with a 12V bulb, could be ur polarity or fan prob. Not likely scenario...

 

[edwin_lcw]

sourcing power like indawse show was the most precise idea coz the fan will run when the amp is turned on (that also depend how u install the amp:rolleyes:)
hahaha u can see the numbers on the relay hahahaha