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Class D Switching Power Amplifiers and Power D/A conversion

TPA3116D2 Amp
TPA3116D2 Amp
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Old 22nd August 2019, 07:41 AM   #11131
Nenola is online now Nenola  Finland
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Quote:
Originally Posted by Skylar88 View Post
I'm not keen to order another one from the same company as they might just send the same wrong model again.
Did you order from ebay or similar? And the supplier is from china? They might have some incomplete and poorly designed products for sale, but they usually respond to feedback quite well. Just tell them that you got the wrong product (and send them a picture), and you will probably get a new one for free.
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Old 22nd August 2019, 01:08 PM   #11132
Skylar88 is online now Skylar88  South Africa
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Quote:
Originally Posted by Nenola View Post
Did you order from ebay or similar? And the supplier is from china? They might have some incomplete and poorly designed products for sale, but they usually respond to feedback quite well. Just tell them that you got the wrong product (and send them a picture), and you will probably get a new one for free.
Thank you for the advice, Nenola. Yes, I've ordered it from Banggood.com in China. I will try to explain the problem to them and hopefully get a new one. But my experience with that company is not very good. It seems their staff do not know much about the products, but I will try anyway.

And even if they send a new one, I might only get it in 9 - 12 months - if I get it at all. The postal service in my country is so bad, I have to use a courier for all imports if I don't want to wait so long. So this is a triple loss for me, since the courier fees were twice as much as the item cost.
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Old 22nd August 2019, 01:37 PM   #11133
phofman is offline phofman  Czech Republic
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I do not know about banggood, but I have never been turned down at neither ebay nor aliexpress when asking for resend or full refund if an incorrect or even DOA item was shipped.
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Old 22nd August 2019, 02:19 PM   #11134
Skylar88 is online now Skylar88  South Africa
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Originally Posted by phofman View Post
I do not know about banggood, but I have never been turned down at neither ebay nor aliexpress when asking for resend or full refund if an incorrect or even DOA item was shipped.

Thanks for confirming that. I will try to get another unit sent. Anyway, this has become a long term project because I'm not going to pay courier fees again.

With some luck, I will get this unit working as a stereo amp, but I bought it as a sub amp because I need a sub for use with my FR home speakers.
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Old 23rd August 2019, 07:02 AM   #11135
tero82 is offline tero82
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The subwoofer channel whispers but the sound is heard,
the right speaker stops the sound and the left bangs.
There is enough power.
Now where do you really go about finding a solution to this problem ?? Can I get some power through this?
I bought it to ebay and it is similar 2.1 Channel High Power Digital Power Amplifier Board TPA3116D2 2*80W + 100W DIY 6256299537411 | eBay
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Old 25th August 2019, 12:09 PM   #11136
Skylar88 is online now Skylar88  South Africa
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Originally Posted by Turbowatch2 View Post
I do not now this specific model, but these amps can sound very good, depending on power supply and loudspeaker. It might even challenge the Pass amp, with a matching load.
Just give it a try with your 24V SMPS. Nothing looks really wrong on the board.
Just some feedback on the stereo amp that Banggood sent instead of the mono sub amp that I ordered.

I finally managed to get it working on 24V, and must say I'm quite impressed with the sound quality.

Channel separation is very good, but that may be a function of the excellent AKSA Lender preamp. Imaging and bass is not on par whith the Pass ACA, but the uninitiated will probably not realize this. However, I suspect the TPA3116D2 is more suitable for playing modern music. With Jazz and "girl with a guitar" type music, I can easily tel the difference between this amp and the Pass ACA. I'm using FR speakers, btw. without a sub.

Click the image to open in full size.
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Old 26th August 2019, 12:49 AM   #11137
Turbowatch2 is offline Turbowatch2  Germany
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Sound quality might improve if you let it play over night.
See the sound quality in relation to the 3 small electrolytic´s, random power supply, cruel input jack and cheap parts. So there is quite some room for improvement compared to out of the box condition. The power might even have to pass through a single diode for example (reverse polarity protection).
Think of some parts borrowed from the Pass amp and it might get more close.

Also, the Pass amps have a reputation of sounding a bit tube like, with optimized distortion spectrum.

Anyway, it is quite impressive, even more in relation to price , part count and price.
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Old 26th August 2019, 07:34 AM   #11138
phofman is offline phofman  Czech Republic
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I do not like the input traces all the way from the back along the output inductors to the front of the board. My first mod would be cutting the traces by the pot and soldering shielded cables directly to the pot.
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Old 26th August 2019, 08:02 AM   #11139
Skylar88 is online now Skylar88  South Africa
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Originally Posted by phofman View Post
I do not like the input traces all the way from the back along the output inductors to the front of the board. My first mod would be cutting the traces by the pot and soldering shielded cables directly to the pot.

Good catch. I agree with you. I want to change the input socket anyway, because the connections are intermittent with channels losing signal if one just touches the cable.
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Old 26th August 2019, 08:05 AM   #11140
phofman is offline phofman  Czech Republic
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Soldered joint is always the best, if can be afforded.
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