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Douk A5 Budget Stereo Amplifier Review

Rate this amplifier:

  • 1. Poor (headless panther)

    Votes: 9 2.9%
  • 2. Not terrible (postman panther)

    Votes: 41 13.3%
  • 3. Fine (happy panther)

    Votes: 155 50.2%
  • 4. Great (golfing panther)

    Votes: 104 33.7%

  • Total voters
    309
Thanks for the review!

If you think $100 is cheap, Douk’s AliExpress store has been running sales for around $70. That’s how much I got it for in February. What a great little amp!
be careful of version , special ali version / some chanel sale

for exemple 6 cd external cd writer sold as new on amazon , 6 different seller and model , ALL have inside old writer ..after teardow and review

i buy a product on amazon , seller amazon , official product , amazon version china made , THE SAME product in big shop near me : france made
 
I think Douk should be thanking you for the exposure too, possibly sending some fine tea over to the Seattle area or maybe send a representative over to valet your camper van.
Yes, although I got the impression from our host's comments after some tests that Amir always enjoys a good, tasty and plentiful meal.

A few years ago, I promised my wife that I wouldn't put any more “hi-fi junk” in the house, which I have generally kept.

But it's these little chip amplifiers that I've found so fascinating for some time now that I've bought a few of them again, even though I don't really need them.

On the other hand, they don't take up much space either ...

Not so long ago, however, there were very few amplifier designs with the TPA3255, but only the TPA3116 were widely available here in Europe.
That was also the first chip amplifier I bought, a Nobsound NS-15G PRO CSR8675, whereby Douk and Nobsound are identical.

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However, even then I wondered why there weren't more designs with the TPA325x on the market, as it always seemed to me to have very promising specifications.

Lo and behold, a lot of these TPA3255 amplifiers are currently being released and consumers have a very good choice. When it comes to the selection of components and features, the manufacturers, who are all based in the Pearl River Delta 珠江三角洲 and most of them in Shenzhen, seem to cross-fertilize each other technologically, because the layers and components of the boards are similar, even if they are not identical.

PFFB, Wima and ELNA capacitors, TDK inductors etc.

I imagine that the competition is fierce and the profit margin is clear when you realize top audio performance and sales prices in the range of 80 to 300 USD at the same time.

I would therefore like to take this opportunity to thank not only our host for testing the components, but also the staff at O-Noorus, Aiyima, Fosi, Douk and 3e Audio, who regularly bring new amplifiers onto the market with very good data and features at very reasonable prices and are always open to customer inquiries and suggestions from this forum.
I can't wait to see what comes next.

Only positive things? Almost, but not only.
I think there is a reason why many of these amplifiers are only supplied with smaller power supplies, which is perfectly adequate for most applications.
However, if you really want to exploit the potential of the TPA3255 to the full and use a 48V 12.5A power supply, for example, even more emphasis should be placed on the thermal design, which is of course more complex and expensive.

What can also be seen in many of these small, stylish and flat amplifiers is the horizontal use of the large capacitors in the immediate vicinity of the heat-generating main chip. This is also a suboptimal solution.

In my opinion, the Douk A5 has an incredibly good price-performance ratio and it offers a very good connection to a subwoofer. I think it's a very practical and stylish solution, although of course (it's ASR) there are many critical voices about the LED design and the possibility of replacing the OP amps, but I think to myself: it's an option, you don't have to do it.

I think the glass lid is quite nice, but it should be firmly lockable. I find it questionable when you buy an electronic product whose electronic components are exposed in case of doubt.
 
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Voted for not terrible and definitely would choose a different amp if was buying something like this.
Loxjie A30 from 2020 still looks like almost ideal desktop solution with its features (integrated DAC) and performance pack except poor HP amp.
 
Loxjie A30 from 2020 still looks like almost ideal desktop solution with its features
Not comparable, as the chip and features are different.
If you want to compare in the TPA3255 camp, then with Aiyima A80 or O-Noorus D4 or the soon to be released D3 Pro.

If I were to buy an Infineon chip amplifier, it would probably be this O-Noorus OA70 for ridiculous money (70 USD)
 
As an amp it's meh. As an amp for $99 it's outstanding.

An example: I'd like to see much better IMD and high-frequency distortion performance, but at this price point its low noise, very good channel separation, and ability to drive low impedance loads is IMHO more important to have achieved than ultra-low distortion at every frequency.

It's hard to see how anyone could rate this poorly given the price.
The hf distortion figures would be regarded as 'good' forty years ago in Colloms-authored HiFi Choice (and HFN) tests. Variable lf filtering a godsend for smaller speakers which distort like crazy below 80Hz or so, so more power can be delivered in the midrange I think.

£110 or so on UK Amazon. I'm sorely tempted to get one to play with in the second rig (it might even work as a power amp in the main one at the levels I play at now), although I'm overwhelmed with ancient electronics currently, all of which works just fine and the power amps 'measure' at least as well, especially at hf....
 
Not comparable, as the chip and features are different.
If you want to compare in the TPA3255 camp, then with Aiyima A80 or O-Noorus D4 or the soon to be released D3 Pro.

If I were to buy an Infineon chip amplifier, it would probably be this O-Noorus OA70 for ridiculous money (70 USD)
I'm talking from customer's perspective, not from engineering. Price/performance is all that matters and if Infineon beats some poor implementations of 3255 then get it instead. Might be opposite as well.

So, going back to Lox A30 - I don't see much evolution in performance after 5 years. With all respect but also being honest - I'm not bothered much how exactly subpar amps from "some random letters" brands differ from one another. What matters is to find the best among them.

My excuses in advance if that all sound rude. But that one is just another generic amp for that price, except HPF which is rather a quirky feature and not the factor of choice.
 
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I'm talking from customer's perspective, not from engineering. Price/performance is all that matters and if Infineon beats some poor implementations of 3255 then get it instead. Might be opposite as well.

So, going back to Lox A30 - I don't see much evolution in performance after 5 years. With all respect but also being honest - I'm not bothered much how exactly subpar amps from "some random letters" brands differ from one another. What matters is to find the best among them.

My excuses in advance if that all sound rude.
The loxjie's rca input has terrible performance, better with the digital input but still inferior to the douk A5, also it suffers like all the old cheap class D of load dependence, the power on 8 ohms is just 18 watts, also it currently costs about 180 euros, almost double.
Unless you need integrated digital inputs, I do not see the A30 as a better purchase.
 
So is anyone claiming that when these low cost, well-measuring amps have enough power to drive the speakers they are connected to, they will sound the same as a much more expensive amp that measures similarly?
 
So is anyone claiming that when these low cost, well-measuring amps have enough power to drive the speakers they are connected to, they will sound the same as a much more expensive amp that measures similarly?
Yes, anyone who has basic technical knowledge (obviously if they work within their power range)
 
The loxjie's rca input has terrible performance, better with the digital input but still inferior to the douk A5, also it suffers like all the old cheap class D of load dependence, the power on 8 ohms is just 18 watts, also it currently costs about 180 euros, almost double.
Unless you need integrated digital inputs, I do not see the A30 as a better purchase.
It's 150 or 160 eur, it contains dac, and not a bad one, and it's performance via USB input is pretty much the same - subpar as well.

Overall, as a complete device, to me it's way more attractive. Again, I'm judging it as a device to "buy one and simply use it".

Wish it was improved and had DAC out and normal, non-distorting amp in tho, still like how NAD did that in their classic amps.
 
The hf distortion figures would be regarded as 'good' forty years ago in Colloms-authored HiFi Choice (and HFN) tests. Variable lf filtering a godsend for smaller speakers which distort like crazy below 80Hz or so, so more power can be delivered in the midrange I think.

£110 or so on UK Amazon. I'm sorely tempted to get one to play with in the second rig (it might even work as a power amp in the main one at the levels I play at now), although I'm overwhelmed with ancient electronics currently, all of which works just fine and the power amps 'measure' at least as well, especially at hf....

Indeed - I'd presume Colloms would want to see a good deal of HF distortion since I would guess to him that would suggest low or minimal use of feedback, and to my understanding one of the many hifi myths he subscribed to was that low or no-feedback designs were "purer."
 
So is anyone claiming that when these low cost, well-measuring amps have enough power to drive the speakers they are connected to, they will sound the same as a much more expensive amp that measures similarly?
Yes I will make that claim. Rather than take other peoples word for it try it yourself. The best time and money I have ever spent on this hobby was going to the trouble to set up a level matched ABX test between 2 radically different amps and could not tell them apart. You can read about it but once you experience it for yourself it will change your perspective and give you confidence. I no longer waste much time thinking about different amps and focus my energy on what I can actually hear which is speakers and room and source material.
 
Yes I will make that claim. Rather than take other peoples word for it try it yourself. The best time and money I have ever spent on this hobby was going to the trouble to set up a level matched ABX test between 2 radically different amps and could not tell them apart. You can read about it but once you experience it for yourself it will change your perspective and give you confidence. I no longer waste much time thinking about different amps and focus my energy on what I can actually hear which is speakers and room and source material.

Good advice, well stated!
 
99 eur, USB in, sub amp (can't tell how bad LPF/HPF are, probable very bad lol)
 
Comparing the Douk in terms of thd, power and load delivery it appears to be a direct competitor to your average $10k Class A monoblock.
 
So is anyone claiming that when these low cost, well-measuring amps have enough power to drive the speakers they are connected to, they will sound the same as a much more expensive amp that measures similarly?
I'm guessing that you have been spending time in non-evidence requiring audiophile communities where all kinds of silly nonsense is talked about and treated like evidence.

Without a shadow of a doubt, in level matched, multiple trial, blind listening tests, an inexpensive but well designed amp, with enough power for the load will sound identical to a more expensive piece of gear. As long as the amp can contribute to the chain in an audibly transparent fashion, that is all the hearing brain can ever use.

Do you find that so hard to accept?
 
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