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Class D Switching Power Amplifiers and Power D/A conversion

Which TPA3116D2 amp?
Which TPA3116D2 amp?
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Old 4th November 2018, 09:02 PM   #1
Ian2000t is offline Ian2000t
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Join Date: Nov 2018
Default Which TPA3116D2 amp?

Hi, I am looking to build a 2.1 audio system using a TPA3116D2 amp and a 19v laptop PSU. I've read some of the threads on here which suggest it's a very good amp for the price.

But, does it matter which board I buy? There are plenty on Aliexpress, Ebay, amazon etc., but is there any difference?

I was looking at these :

KKmoon TPA3116D2 50W*2+100W 2.1 Channel Digital: Amazon.co.uk: Electronics

HALJIA TPA3116D2 2 x 50W + 100W 2.1 Channel Digital Subwoofer Power Amplifier Board DC12V-24V: Amazon.co.uk: Lighting

The reviews on amazon don't seem that great though, which made me wonder if it's an inferior version?
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Old 5th November 2018, 07:16 PM   #2
FauxFrench is offline FauxFrench  France
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Join Date: Dec 2017
Location: The mountains, calm and quiet.
It would have been best if one of the members with experience on 2.1 TPA3116 boards responded. I know the TPA3116 reasonably well but I have no experience with 2.1 boards.

The differences are:
Any regular design flaws? (you need experience from practice)
The output filter chokes?
The power line decoupling?
The output filter capacitors?
The input coupling capacitors?
The heatsink capacity?

Reviews by individuals can be misguiding because they may have own economical interests or do not know how to use the boards correctly.

Do you need an on-board low-pass filter for the sub-woofer channel?
How much are you used to do modification of a board if needed?
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