DMP3 Problem

  • Thread starter Thread starter eswan
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eswan

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Ok, so this weekend i plugged in my newly purchased M-audio DMP-3. As soon as a turned on the power, the VU meters lit up and shot over to the right and the "clip" light came on both channels, while the "power" light didn't come on. I fiddled with the gain knobs, but it became obvious that something was wrong.

So I looked at the power supply wall wart that came with the unit. It says the output is 12 volts DC - 1 amp. The unit is supposed to run on a 9 volt AC 1 amp output.

Obviously, I will contact M-audio's tech support on Monday, but I was wondering if this totally fried the amp or what. I'm not too informed on what a greater voltage or wrong type of current (AC v DC) can do to an amp. I'm wondering if I should just ask them to replace the whole unit, since they will probably just send me a replacement power supply.

Thanks alot
 
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e,
On power up my DMP does the meter thing also, but I have had no problem with it for the year or so I have used it.

Tom
 
e,
On power up my DMP does the meter thing also, but I have had no problem with it for the year or so I have used it.

By the way, I am looking for a good deal on another, where did you buy yours, and how much did you pay?

Tom
 
Tmix
Thanks for your experience, but my unit won't work at all. It keeps clipping not matter whether or not I have a mic plugged into it. I think the main reason its clipping is that I was giving DC from the supplied adaptor, when it should have been AC. I wonder what effect this has on the circuitry. I'lll call them today.

Anway, I bought it new for 160 from Zzounds.com. All those mailorder places had it the same price, but zzounds had really quick free shipping.
Thanks
 
The unit may still be ok... much better to put a DC voltage across an AC circuit than the other way, and most 9 volt circuits will tolerate 12 volts for a short period.

That said... I'd still recommend getting a RA number and having ZZounds exchange the unit...
 
Giving you a 12V DC supply for a 9V AC device is a serious mistake. I would send the whole thing back. MoFo Pro is right in saying DC to an AC device is better that the other way around, but it's hard to say what kind of damage you've done to the AC rectifying circuit, or the unit in general. All the LED's coming on is a good sign that a lot of components inside there are seeing voltages they weren't designed to handle.
 
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