PA amplifier trouble PLEASE HELP :)

sam1987 · #1 (**permalink**) 9th October 2009 , 04:13 AM

Hi everyone,

I just got my new pa amoplifer, its a 2 channel 1500 WRMS amp, and after hooking it all up to my mixer/speakers and powering up, I noticed that one of the channels clips before the other one does. Both levels are set in the middle to, any idea why this is?

Is it ok to just turn the lower one up until they are both clipping, and then reduce the volume so it doesnt clip?

Or should I get it fixed or return it to the shop?

Any help would be greatly appreciated!

Sam.

Tifstorey · #2 (**permalink**) 9th October 2009 , 10:11 AM

What are you playing through it to get the signal?

ecc83 · #3 (**permalink**) 11th October 2009 , 03:40 PM

Either the two channels have different gains (unlikely) or the clip/metering is poorly calibrated.

You need to feed it a mono 1kHz tone and measure the output. I have no experience with modern high power PA's (what IS it BTW!?) but I would have thought that the op's would be within 1dB of each other with the main input at max.

Only the accompanying specification can tell you what to expect and if it doesn't. ASK THEM!

Dave.

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#1 (permalink) 9th October 2009 , 04:13 AM
sam1987 Junior Member Join Date: Oct 2009 Posts: 1	PA amplifier trouble PLEASE HELP :) Hi everyone, I just got my new pa amoplifer, its a 2 channel 1500 WRMS amp, and after hooking it all up to my mixer/speakers and powering up, I noticed that one of the channels clips before the other one does. Both levels are set in the middle to, any idea why this is? Is it ok to just turn the lower one up until they are both clipping, and then reduce the volume so it doesnt clip? Or should I get it fixed or return it to the shop? Any help would be greatly appreciated! Sam.
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#2 (permalink) 9th October 2009 , 10:11 AM
Tifstorey Super Member Join Date: Jul 2008 Location: Burnley, Lancashire Posts: 459	What are you playing through it to get the signal? ______________________________ Creativity is allowing yourself to make mistakes. Art is knowing which ones to keep. - SA
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#3 (permalink) 11th October 2009 , 03:40 PM
ecc83 Super Member Join Date: Jul 2008 Posts: 400	Either the two channels have different gains (unlikely) or the clip/metering is poorly calibrated. You need to feed it a mono 1kHz tone and measure the output. I have no experience with modern high power PA's (what IS it BTW!?) but I would have thought that the op's would be within 1dB of each other with the main input at max. Only the accompanying specification can tell you what to expect and if it doesn't. ASK THEM! Dave.
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