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Dj BASS AMP 14th November 2002 01:50 PM

Amplifier Problem !!!
 
i have a DJ Amplifier... 800W x2 i connect to the amp a 2 speakers of 900W ~ 4 Ohm and after 10 minutes...
the heatsink hot !!! but very very hot !! and in the amp have 4 fans... i scare that the amp will burn or dont work.... i need that the amp will work minimum 3 hours !!!....
what can i do??
and what the max temperature (celsius - C ) that amp can be on fire??

what can i do that amp will dont hot~burn ?!?

UrSv 14th November 2002 01:58 PM

What amplifier is it? Make and model? Could help. Normally I would expect a "DJ amplifier" to have temperature protection so that it will shut down when too hot.

/UrSv

trwh 14th November 2002 02:29 PM

Dj BASS AMP,

Most PA amps shut down at around 80 - 90 degrees C heatsink temperature. Bear in mind that this is an absolute maximum, a safe continuous operating temperature would be cooler than this. If your amp is overheating, it is likely there is a fault with the amp or the load connected to it.

Check your speaker load (and cables) with an ohmmeter. A 4 ohm speaker should have a DC resistance of around 3 ohms. Check that the fans in the amp are operating properly, and that the heatsink is free of dust.

If you cannot find a fault, then it may simply be that the manufacturer has given incorrect specifications for the amp - you could invest in a good quality (second hand?) PA amp.

Hope this helps,
Tim.

Dj BASS AMP 14th November 2002 04:44 PM

if the amp will shut down it is dont good ! because the amp need to work 3 hours minimum...

my cable is 5 meter on 4MM ani one

UrSv 14th November 2002 05:11 PM

Quote:

Originally posted by UrSv
What amplifier is it? Make and model? Could help. Normally I would expect a "DJ amplifier" to have temperature protection so that it will shut down when too hot.

/UrSv

Need answers?

/UrSv

jleaman 14th November 2002 05:25 PM

what kinda amp is it.? i would check for shorts in the wire and speakers. you might have a blown crossover i have seen that happen where the xover creats a shor but only the amp see's it and the amp gets hot. also i would look inside tha amps and see if there is any thing shorting out. i would try desconecting the speakers and leave the tunes going through the amp and see if it still gets hot if not then try a small pair of speakers just some thing for a test let it run for about 10 min see if they get hot if not then just try one of your dj speakers then the other. my old inkel amp got hot too but that was because it was pushin 9 hours with no fan and 2 x 18" 2ohm speakers but it had thermal break down HEHE so i fixed it and made the amp stay on all the time. : O )

Jason

Dj BASS AMP 14th November 2002 06:27 PM

if my amp at around 45 - 65 degrees C heatsink temperature...
it is ok?...

i measure the degrees C heatsink temperature...

djdan 14th November 2002 07:39 PM

DJ BASS AMP

1. What loudspeaker type ?
2. Do you read another people threat ?

jan.didden 14th November 2002 08:49 PM

Amp problem
 
Quote:

Originally posted by Dj BASS AMP
if my amp at around 45 - 65 degrees C heatsink temperature...
it is ok?...

i measure the degrees C heatsink temperature...

A good rule of thumb is if you can touch the metal for 5 sec or so before you HAVE to pull back, it's probably around 50 deg Celsius.

Jan Didden

PedroPO 14th November 2002 08:59 PM

That temperature is good for some amps, but be sure that that amp doesn't have plastic covers and other melting stuff.

(my transistor amps run all at 50șC :D)

I would try also with other speakers, just to be sure they are ok.


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