03-18-2013 05:44 PM
Someone on another forum was wondering about a "smell" coming from his churchs' powered mixer. They're not running the mixers' internal amps, but rather, they're running from the mixers' line-outs, into a separate power-amp and speakers.
The description of the "smell" is vague, but it's all I've got. Does the mixers' internal amps need some sort of a load? The mixer btw, is a Behringer PMP1000.
This guy says he spoke to some people at Behringer, and got two different answers. One said that it "MAY" need some sort of "draw" (his words), and the other rep said, "Nah, it's probably just going bad".
How's that for "support"?
03-18-2013 06:08 PM
A decent designed amp will not blow without a load on it.
Would it not be ridiculus for Bhngr to design a powered mixer that requires a load on it so you cant just use
the low level outputs only?
I saw nothing in the user manual about a caution or danger or your amp will explode with no load
on the amplifier outputs.
I am assuming they have the unit well ventilated and not blocking airflow. Preferably sitting on a hard
surface and not in a road case on foam or carpet.
03-18-2013 08:10 PM - edited 03-18-2013 08:13 PM
Apparently, the mixers' fan is working OK, and it's not clogged with dust. I presume they must have a short somewhere inside, because the OP now says "it stunk up the place",,, meaning his church I presume. Oddly, he said nothing about smoke,,,, just a bad smell. Now, he did state that the smell during the church-service, and that the mixer had been on for roughly 3 1/2 hours. In his words "working fine now, but it stinks". Failing power-supply maybe? Or a disintegrating plastic bushing in the fan?
Their mixer is only two years old.
03-18-2013 08:24 PM
When capacitors fail, they bulge and leak, and sometimes smell. Burnt resistors also smell. I would stop using the unit right now! ........There may be an electrocution hazard.... Consider removing the rear cover and examine it with a flashlight to look for bulging/leaking capacitors or burnt resistors.
Or better yet have an electronics tech look at it. If you are going to look at it yourself make sure it is not plugged in.
03-18-2013 08:36 PM
03-18-2013 09:42 PM
I've asked the guy to check the board more thoroughly, and to have a look at the power-cord, where it connects to the mixer, and a bunch of other stuff to look at. Looks like he's gone for tonight, so I didn't get an answer back.
He says he's willing to lend his own board to the church for a while, but from what I gather, the "smelly" board is still plugged in, and resides at the church. I'll see if I can get him to call someone at the church, to have the board disconnected..
03-19-2013 09:39 AM - edited 03-19-2013 09:40 AM
That's an interesting coincidence. My friend who runs tech for Metro Maryland Youth For Christ said the same thing happened to their board (also a PMP1000) during their last event a couple months ago. They were using the amps though. He is borrowing our church's powered board for a function they are doing this coming weekend. He asked if I would help him spec a system for them after this weekend. Hopefully MMYFC won't skimp on the budget this time.
03-19-2013 12:26 PM
I haven't heard back from the OP yet, although he did state that the mixer has now been disconnected. Apparently, he does not operate the board. Someone else was at the controls, when the smell happened. Supposedly, the mixer still functioned "fine" after the incident. It apparently got very hot ("stove-top hot") underneath, as the "smell" happened.
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