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Comparing TPA3116 2.1 Power Amplifiers: XH-M139 vs TPA3116D2, DC12V-24V, 2x50W+100W

cypeks 6618 6
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 17118471
    cypeks
    Level 12  
    I want to use a ready-made power amplifier for a 2.1 set. After reading the "internet", the choice fell on a design based on TPA3116. I invented two such prefabs, cheaper and slightly more expensive. I would ask people who are practitioners in this type of solutions to "with their eyes" examine the type and quality of the elements used.

    more expensive
    https://www.aliexpress.com/item/DC12V-24V-2-5...plifier-Board-Chip-TPA3116D2/32574627375.html

    cheaper
    https://www.ebay.com/itm/TPA3116D2-2x-50W-100...-Subwoofer-Power-Amplifier-Board/311616288645

    which of the above constructions seems to be more correct (I know that without a schematic it is difficult to define it unequivocally).
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  • #2 17118513
    bestboy21
    Level 40  
    Both are the most ordinary china.
    However, I would probably take the cheaper one, I have it operational amplifiers in the DIP8 housing, which in the event of a failure will facilitate repair, and you can put in much better ones, if someone wants to.
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  • #3 17118525
    cypeks
    Level 12  
    Do not expect any Hi-End equipment for this price.
    The number of ceramic and electrolytic capacitors used is different in both systems, is it more important? In the more expensive there are 3 operational amplifiers and in the cheaper 2 - what is their role and where does this difference come from?
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  • #4 17118544
    rufus4333
    Level 19  
    Before you buy, I suggest you check out this video:
    https://www.youtube.com/watch?v=_V1iUEtVerg

    I will just add that almost all Chinese 2.1 designs on the TPA3116 chip are not suitable for listening without modifications - they just hum terribly. You have to reduce the gain and replace the potentiometers to make it sound well.

    Besides, these amplifiers do not have an adjustable cut-off frequency for the subwoofer, which is a very big disadvantage, practically disqualifying them to more serious loudspeakers.

    In my opinion, it's better to put in some money and buy an uncompromising solution (okay, with less compromise). For example, something like this: https://www.youtube.com/watch?v=5yuzHeXVR8E
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  • #5 17118546
    bestboy21
    Level 40  
    The amplifier works in the equalizer path (treble / bass) and maybe in the volume control, where there are 3, maybe the third one works as an input buffer.
    Don't ask unanswered questions.
    The capacitors can be replaced, anyway, these electrolytes can be replaced anyway because it is real Chinese (in both cases).
  • #6 17119837
    cypeks
    Level 12  
    rufus4333 wrote:
    In my opinion, it's better to put in some money and buy an uncompromising solution (okay, with less compromise). For example, something like this: https://www.youtube.com/watch?v=5yuzHeXVR8E

    I found something like this:
    https://www.aliexpress.com/item/Alloyseed-TPA...4V-Super-Bass-Speaker-Module/32848761505.html

    it looks like the same construction. Does anyone have an idea what this wire tied around the potentiometers should serve?
  • #7 17119841
    Freddy
    Level 43  
    cypeks wrote:
    Anyone have an idea what this wire tied around the potentiometers should serve?
    Connection of enclosures to ground?
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Topic summary

The discussion centers on comparing two TPA3116-based 2.1 power amplifiers: the XH-M139 and a cheaper TPA3116D2 model. Users express skepticism about the quality of both amplifiers, noting that they are typical Chinese products. The cheaper model is favored for its operational amplifiers in DIP8 housing, which allows for easier upgrades. Concerns are raised about the number of capacitors and operational amplifiers, with the more expensive model featuring three operational amplifiers compared to two in the cheaper one. Users recommend modifications to improve sound quality, such as reducing gain and replacing potentiometers, as many TPA3116 designs suffer from noise issues. Additionally, the lack of adjustable cut-off frequency for the subwoofer is highlighted as a significant drawback. A user also inquires about a similar amplifier design found online, questioning the purpose of a wire tied around the potentiometers, which is speculated to be for grounding connections.
Summary generated by the language model.
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