Concert lead question.

[codyl]

Just got a concert lead (silver face, 2 channels, red treble boost switches).  First off I am just curious of what year this model was made.  Second, I am running the head into two 8ohm 4x12 cabs... Everything seems to be fine except the head is getting pretty warm after 45 min or so. When I say warm I mean if you touch the back of the amp for a few seconds it will burn ya.  Anyway, is it normal for the head to get this warm?  Just worried that it may self destruct soon...
 

-cody

[measurestaken]

The eternal question...If someone would be kind enough to do a color (red, silver, etc.) rundown of years, I would be grateful.

[codyl]

Anyone?  I have a show tomorrow night and i really need to know it the amp is suppose to get extremely warm...  The ampeg gets a little warm but the sunn just seems to be getting to warm to me. I wouldn't want any capcitor leakage to go on in there or anything.  So someone please help!
-c

[mckinnon audio]

  Hi there,there is a thermal breaker on the heat sink,it should cut out if the amp gets to hot.I suppose there is a chance it's bad,but they usually stay open as opposed to being shorted on.You're running the amp @ 4 ohms,so it's going to heat up for sure.I think I'd put a fan on it and try that.Hope this is of some help,Mel.

[djc]

4ohms should be ok.  I think safe minimum for those amps is 2.  could be wrong.  I run mine at 4ohms but it's only pushing a 212.

[codyl]

Thanks for the help.  I put a fan on the amp @ the show Saturday and it stayed nice and cool and LOUD!!!

[Isaac]

4ohms should be ok.  I think safe minimum for those amps is 2.  could be wrong.  I run mine at 4ohms but it's only pushing a 212.

No, the silver and black Concert amps were rated down to 4 ohms, not 2.

[djc]

thanks Isaac.