IPR 3000 weird noise ?

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tralfaz
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IPR 3000 weird noise ?

Post by tralfaz » Wed Feb 23, 2011 8:25 am

:)
Last edited by tralfaz on Thu Sep 21, 2017 9:40 am, edited 1 time in total.

Marty McCann
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Re: IPR 3000 weird noise ?

Post by Marty McCann » Wed Feb 23, 2011 9:27 am

tralfaz wrote:Hey all, just finally got my hands on a bright and shiney (love the blue lights) IPR 3000 and I have a strange background noise comming outa both channels, like an oscillating whiny noise. The amp works, but that noise is not acceptable - can't be normal. Yes I tried all the swaps and cords and switches. It is definatly coming from the amp. Any ideas?
Sorry for your inconvenience.

First: Is the noise there when no inputs are connected and the level controls wide open?

Second: Is it still there with the level controls all the way down?

Do you have the ability to check the incoming voltage from the wall?

I would try to plug it in in another room or environment.

Still there? Return it to your dealer or send it to Peavey for service.

tralfaz
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Re: IPR 3000 weird noise ?

Post by tralfaz » Wed Feb 23, 2011 10:06 am

:)
Last edited by tralfaz on Thu Sep 21, 2017 9:41 am, edited 1 time in total.

noelmem1
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Re: IPR 3000 weird noise ?

Post by noelmem1 » Wed Feb 23, 2011 12:08 pm

thats class D amps with unregulated switching power supplies.

noelmem1

tralfaz
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Re: IPR 3000 weird noise ?

Post by tralfaz » Wed Feb 23, 2011 1:05 pm

:)
Last edited by tralfaz on Thu Sep 21, 2017 9:42 am, edited 1 time in total.

Josjor
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Re: IPR 3000 weird noise ?

Post by Josjor » Wed Feb 23, 2011 2:07 pm

tralfaz wrote:
noelmem1 wrote:thats class D amps with unregulated switching power supplies.

noelmem1
It must be a just duff unit. I can not imagine any reputable manufacturer letting this type and amount of noise stand as a design "compromise". Especially when I see others on the net speaking of IPRs as near audiophile amps. :shock:

Yeah, I'm not sure what Noelman means, but yours is definately not standard. I've sold quite a few of these, both the 1600 and 3000's and not had any reports of this so I don't think its endemic to the design.
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Don't believe me. I'm just guessing.
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Marty McCann
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Re: IPR 3000 weird noise ?

Post by Marty McCann » Wed Feb 23, 2011 2:25 pm

Is the noise a bit like a chirping sound, or even high pitch tone?

There are separate clocking devices for each channel. The oscillating frequency is 400 kHz. There are precision R/C's that set the clock, but if the R/C's are out of tolerance, you could be hearing the beat frequency difference.

In which case we will fix the unit under warranty.


Either return it to your dealer, or contact our service department: 601-486-1295.

musicman330
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Re: IPR 3000 weird noise ?

Post by musicman330 » Wed Feb 23, 2011 2:38 pm

So you have noise from the amp not when wired to speakers? That is wrong let them fix it, or maybe your dealer will exchange it then he sends it back.
My 3 3000's and 3 1600's are dead quiet when fully wired not even audible fan noise.

tralfaz
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Re: IPR 3000 weird noise ?

Post by tralfaz » Wed Feb 23, 2011 6:24 pm

:)
Last edited by tralfaz on Thu Sep 21, 2017 9:42 am, edited 1 time in total.

tralfaz
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Re: IPR 3000 weird noise ?

Post by tralfaz » Wed Feb 23, 2011 6:38 pm

:)
Last edited by tralfaz on Thu Sep 21, 2017 9:42 am, edited 1 time in total.

Josjor
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Re: IPR 3000 weird noise ?

Post by Josjor » Wed Feb 23, 2011 7:29 pm

tralfaz wrote: Sadly, my friends have given me a nik-name. Mr. Bad-outa-the-box. Tvs, computers, VCRs DVD players, receivers, power amps, Pretty much all consumer electronics. If there is a bad one on the shelf - I get it. :x

Thanks for taking one for the team. :D :D
www.yandasmusic.com
Don't believe me. I'm just guessing.
Neutiquam Erro

tralfaz
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Re: IPR 3000 weird noise ?

Post by tralfaz » Wed Feb 23, 2011 8:19 pm

:)
Last edited by tralfaz on Thu Sep 21, 2017 9:43 am, edited 1 time in total.

noelmem1
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Location: Baguio City, Philippines

Re: IPR 3000 weird noise ?

Post by noelmem1 » Wed Feb 23, 2011 9:36 pm

josjor ,

i know what i'm talking about , have been kickin' those SMPS all my career life, they feed power rails of digital portion of semiconductor testers they dont use them to drive rails of the precision analog sources simply due to noise, anyway technology advances and all else gets cheap , now they just have to put them in there or lose business to the competitor.

Its complex , a thousand small parts in there and even just one part conks out - it may go ....twweeetttt ! ouch to the buyer.

Nevertheless , I'm waiting for them over here. I need the light weight and low price.

noelmem1

PLSR80
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Re: IPR 3000 weird noise ?

Post by PLSR80 » Thu Feb 24, 2011 4:02 am

DING DING! The outputs on your mixer are proly unbalanced and the inputs on the amp are balance pin 2+! You need a cable that is wired like this and it MUST be a shielded cable!!! (TS/mixer side= Tip/positive/+, Sleeve/negative/- !!! also solder the bare shield/ground to the sleeve (bridging) the negative and ground on this side only!!!) (TRS or Male XLR/Amp side will be wired as usual. Tip/pin 2/+, Ring/pin 3/-, Sleeve/pin 1/Ground. Home Depot sells 22/2 with shield on a 500 foot spool for 60.00 also get 2 TS (1/4 mono) jacks and 2 TRS (1/4 stereo) jack or 2 male XLR jacks will work also. I make all my own cables and use this wire from the Depot. It's 22 awg where premade cables are only 24awg. Use some colored shrink tube on both ends of at least one of these two cables to identify them clearly. It's a good idea to also note the way its wired on custom cables. YES HIT YOUR EQ IN THIS CHAIN IF THATS THE PLAN AND NO NEED FOR ANY SPECIAL CABLE FROM THE EQ TO COMP/AMP WHATEVER IS NEEDED. ***If you don't have any skills with the soldering iron its best you ask the Tech at your local shop to make these. They need to be wired just as I said!!! You can use some lil 4' zip ties to make them a pair or to group many custom cables. DO NOT EVER MAKE THE ZIP TIES REALLY TIGHT AS YOU WILL CHOKE YOUR SIGNAL...JUST TIGHT ENOUGH TO DO THE JOB IS BEST. I LIKE TO KEEP THEM IN NICE STRAIGHT GROUPS AND MAKE THEM JUST A BIT LONGER THAN NEEDED SO THEY AREN'T A TRIP WIRE! ORGANIZE ANY EXTRA CABLE LENGTH INTO A NEAT ROLL AT ONE END OF THE CABLE RUN AND NEVER NEVER NEVER FOLD THEM AS THIS CHOKES YOUR SIGNAL ALSO AND WILL GET YOU LAUGHED AT BY THOSE THAT KNOW BETTER! ALWAYS BE SURE YOUR OUTLETS ARE PROPERLY GROUNDED AND TRY TO KEEP ALL YOUR GEAR ON THE SAME CIRCUIT. IF YOU MUST USE AN EXTENSION CORD DON'T BE A CHEAP ASS. GET A NICE 12AWG, 3-WIRE CORD FOR 50/100 FT AND 10AWG FOR ANYTHING OVER 100 FT. A CHEAP 16AWG CORD WILL ONLY ROB YOUR GEAR OF THE SUPPLIED VOLTAGE AND AMPERAGE THEY NEED TO RUN AS DESIGNED. I'M AN ELECTRICIAN AND I PREACH "GO BIG OR GO HOME". NICE BIG CABLES FOR AC AND SPEAKER CABINETS= LESS RESISTANCE SO YOUR GEAR STAY HAPPY AND COOL. WHEN USING MULTIPLE CORDS FOR AC POWER ALWAYS START WITH THE THICKER CABLE AT THE RECEPTACLE. RECEPTACLE TO 10 AWG/12 AWG/14 AWG TO AUDIO GEAR. KEEP IT LOUD!!!

Josjor
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Re: IPR 3000 weird noise ?

Post by Josjor » Thu Feb 24, 2011 6:17 am

noelmem1 wrote:josjor ,

i know what i'm talking about , have been kickin' those SMPS all my career life, they feed power rails of digital portion of semiconductor testers they dont use them to drive rails of the precision analog sources simply due to noise, anyway technology advances and all else gets cheap , now they just have to put them in there or lose business to the competitor.

Its complex , a thousand small parts in there and even just one part conks out - it may go ....twweeetttt ! ouch to the buyer.

Nevertheless , I'm waiting for them over here. I need the light weight and low price.

noelmem1
I wasn't questioning your knowledge, and I apologize if it seemed that way. Your original post seemed to imply that part of the amplifiers design is to have this noise. I was simply stating that the noise is not normal to these amplifiers.
www.yandasmusic.com
Don't believe me. I'm just guessing.
Neutiquam Erro

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