Concerned product : 14185 - AUDIOPHONICS MPA-S250NC XLR Amplificateur de Puissance Class D Stéréo Ncore NC252MP 2x250W 4 Ohm
Michael -- 2024-05-01 -02:29
Defective product?
The amplifier is frequently cutting out when I switch sources on my AVR. I went through multiple AVR resets to no avail. I tried replacing the interconnects but that didn't solve the problem. I removed the unit from my system, and replaced it with another amp, and the problem disappeared. I don't know what the repair/replacement/refund process is, but I want to see what can be done. Love the amp otherwise.
M. Sav -- 2024-05-02 -09:30
Hello,
Does the front led light OFF itself ?
Best regards
Michael -- 2024-05-02 -17:36
The light stays on but no sound from speakers.
M. Sav -- 2024-05-03 -09:29
Hello,
That's not an amplifier issue.
Can you test with an other préamplifier ?
Best regards
Michael -- 2024-05-03 -15:08
I tested with another amplifier that's running perfectly - same set up.
Before I contacted you, I replaced the interconnects (with brand new cables) to the Audiophonics amp and it cut out immediately.
Any other suggestions as to how to find the cause?
M. Sav -- 2024-05-03 -15:44
Hello,
After a power OFF , then power ON , does the sound comes again ?
Best regards
Michael -- 2024-05-03 -17:14
I'll play around with it this weekend. Thanks.
Michael -- 2024-05-05 -21:30
So I set the Audiophonics amp up in my system again today. I accidentally recreated the problem by plugging in the 12v trigger into the amp. Doing that immediately shut off the main speakers, and I was able to do this several times. Right now the 12v trigger is disconnected, and the amp is working properly. I'm wondering if the trigger somehow shuts the amp down when I switch sources ???
M. Sav -- 2024-05-06 -10:01
Hello,
If you are using a trigger from the preamplifier,
You must use a Mono jack cable and place the front power button in OFF mode.
In my opinion, the issue not comes from a failure of the amplifier.
Best regards
Michael -- 2024-05-14 -17:22
Any reports of failures of the 12v trigger on this unit?
M. Sav -- 2024-05-15 -09:36
Good morning,
We never have a trigger failure in this model.
We have sold over a thousand of this copy.
Best regards
Michael -- 2024-06-09 -18:10
Brand new Denon 4800 AVR - same problem.
Today I added the audiophonics back into my system using the 12v trigger - turned it on, trigger turned the amplifier on, front LED came on and it played and sounded perfectly.
Turned the AVR off. Amplifier went off too.Turned it back on and trigger stopped working. No sound from speakers, but the subwoofer plays.
Turned the Audiophonics on manually, LED lights up but still no sound.
So it worked then it stopped???
What are my options for repair, refund, or replacement?
M. Sav -- 2024-06-10 -10:53
According to the information brought to our attention, your product seems defective and requires a return to our workshop.
If you have any doubt about the fact that the product is really defective (configuration, connections ...), ask us advice before sending it back.
If ever the product is functional in our workshop, we will charge a participation fee for testing and return of 30 €.
Below you will find a pre-filled RMA form to print and enclose in the parcel.
Please write the RMA number on the outside of the package for faster processing of your return.
Dont forget to check the CN23 Form "return good" if you are not in Europe
We will get back to you upon receipt of the product.
Best regards.
Michael -- 2024-06-10 -15:55
Can you please provide the address I should send this to?
M. Sav -- 2024-06-10 -16:02
Hello,
AUDIOPHONICS
10 rue Marcelin Berthelot
33270 FOIRAC
FRANCE
PHONE 0033 09 52 16 82 68
email : [email protected]
Best regards
Michael -- 2024-06-11 -15:17
I'm going to be on vacation next few weeks, and I'll make arrangements to get this sent to you when I return. Do you have a preferred delivery service?
M. Greg -- 2024-06-11 -15:30
Hello,
You can use UPS or fedex
Best regards
Michael -- 2024-07-05 -22:47
Shipping cost to France was prohibitive, so I sent it to a technician here in the US. his findings:
I was able to reproduce your issue and so opened it up to look over the daughtercard used to interface the inputs. I did not see any obvious issue so I tried reseating it. Along the way, I stopped getting output even when the power switch was on. This meant it could still be the amp so swapped in a Hypex evaluation board and started getting output again.
So, on the positive side, the expensive amp portion seems fine. Not so good is the daughtercard as it died more completely and is now more work to replace. Am not sure your urgency, but if Audiophonics is willing to send a replacement, would be the cheapest and simplest fix. Another approach would replace it with the Hypex eval board and the trigger input board I quoted earlier. This would require resoldering all the XLR inputs and the switch and trigger wiring.
What are my options here?
Michael Farley -- 2024-07-07 -18:56
New follow up from the tecnichian:
An update for you as your amp was connected to my speaker test setup and happened to cycle power on it and it started working again. This made me curious and so went through another round of testing. I reproduced the problem after a time again and so now realized the problem was a more intermittent one. I put the eval board in and all was good again, but took one additional step, I did the same power cycling. Shortly into my testing, there was no output again AND the clip LED came on the EVAL board. This indicates an uncorrectable error in the amp output. So, looks like the amp after all.
Michael Farley -- 2024-07-07 -19:13
Since I bought this less than two years ago, I'm asking for a refund or a replacement. Please let me hear from you. I've spent way too much time on this issue. Thank you.
M. Greg -- 2024-07-08 -10:21
Hello,
According to the informations brought to our attention, your product seems defective and requires a return to our workshop.
Below you will find a pre-filled RMA form to print and enclose in the parcel.
If you have any doubt about the fact that the product is really defective (configuration, connections ...), ask us advice before sending it back.
If ever the product is functional in our workshop, we will charge a participation fee for testing and return of 30 €.
As it is a breakdown on unpacking we will cover the return postage.
Attached to this message is a pre-paid Colissimo label to return the product.
The RMA number supplied with the return label is valid for 10 days from today.
The return costs are our expense, you just have to deposit parcel in your post office.
If you encounter any problem with the prepaid return label, please do not ship the package yourself and come back to us indicating the problem encountered.
In case of shipping at your expense, we can only refund the maximum amount of shipping costs of your initial order.
We will contact you at the reception of your parcel.
Best regards.
File attachment ::
Michael Farley -- 2024-07-09 -14:57
Thank you. The amplifier is being shipped back from my technician, and I will send to you once I have it.
Michael Farley -- 2024-07-12 -18:34
The amplifier was shipped back to Audiophonics a few minutes ago.
One last remark from my technician:
"I did not try any extraordinary measures and do not have a heat imaging camera, but likely this is a heat issue as it happens after the unit warms up. Hopefully you mentioned to Audiophonics so they can reproduce the failure readily."
Keep me posted on developments. Thanks.
M. Sav -- 2024-07-15 -10:58
Hello,
I will contact you at receive
Best regards
M. Sav -- 2024-07-19 -14:13
Hello,
Your package has been received by our service.
We will get back to you as soon as possible.
Regards,
Michael -- 2024-07-19 -15:26
Please tell your technician about the findings of my technician, that I sent previously. Might be helpful. Thanks.
M. Sav -- 2024-07-23 -11:43
Hello,
We have found the fault on your amplifier,
A ceramic capacitor in the Power ON circuit have been remplaced.
I will send your amplifier back today
Can you confirm the return adress
Best regards
Michael -- 2024-07-23 -18:02
Return address is correct. Thank you.
Michael -- 2024-07-23 -21:01
Please send me a tracking number when it is is mailed.
M. Sav -- 2024-07-24 -09:10
Hello,
You will received he tracking in the evening.
it is 9h00 am in France now.
Best regards
Michael -- 2024-07-24 -12:12
Thanks for your help.
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