Another TPA3255 Amplifier is Coming? Douk Audio A100 Mono/Stereo Amplifier!

[Douk Audio]

yeah look i mean this amp will probably not find a place with many people here

to me it looks like the amps you install inside arcade and poker machines... it has a place but i doubt it works well in many domestic environments

Hi, thank you for your idea. As for its appearance, yeah, looks a little weird when adding the cooling fin on the top...
But it really can be used in domestic environments. It is compact and adopts four-layer gold immersion PCB, and with large cooling area and high cooling efficiency. It provides enough power for home speakers, its output can reach 300W*2 in actual, some TPA3255 amps only can max output 240W and will enter overheat protection.

 

[Douk Audio]

Hi, here is the power output of our A100, it can provide 300W*2 output in actual (tested under DC 51V).

I don't know other brands' TPA3255 amps, but before A100, our other TPA3255 amps can only max output 240W and will enter overheat protection. We are so glad that through the continuous efforts of our engineers, we have achieved this goal on the A100!

 

[MCH]

Hi, here is the power output of our A100, it can provide 300W*2 output in actual (tested under DC 51V).
View attachment 377240

I don't know other brands' TPA3255 amps, but before A100, our other TPA3255 amps can only max output 240W and will enter overheat protection. We are so glad that through the continuous efforts of our engineers, we have achieved this goal on the A100!

What is the load?

 

[Douk Audio]

What is the load?

4 ohm

 

[Wolf11Man]

How many years of research did your engineers need to find out that a heat sink on top works better for cooling than no heatsink at the bottom?
They sure are on the list for the next Nobel prize.
I hope you have granted a world wide patent for this revolutionary invention?

 

[Eleo]

How many years of research did your engineers need to find out that a heat sink on top works better for cooling than no heatsink at the bottom?
They sure are on the list for the next Nobel prize.
I hope you have granted a world wide patent for this revolutionary invention?

Please refrain from such harsh language. After all, no one is forcing you to follow this thread.

 

[Wolf11Man]

Sorry, but this is no friendly DIYS guy, but someone who pretends to be an audio expert and does this writing for a living.
So if he writes rediculous stuff about the advantages of his commercial product, someone should tell him. Otherwise the next commercial post will be about even more ridiculous claims why a product should be worth more money than that of a competitor. It is all about money, not sound quality here.

Anyway, with a the usualy supplied 180 Watt power supply, this amp is not able to put out 300+300 Watt in any case. we will need about 10 Amps and 48 Volt to get into that region.
I was so friendly not to comment on the "design" of this product, as this is something very subjective.

 

[MCH]

Anyway, with a the usualy supplied 120 Watt power supply, this amp is not able to put out 300+300 Watt in any case. we will need about 10 Amps and 48 Volt to get into that region.
I was so friendly not to comment on the "design" of this product, as this is something very subjective.

They said tested at 51V, so obviously not with the supplied PSU.
But completely agree that they should share complete test conditions or shut up

 

[Douk Audio]

Looking forward to it, roughly when will it go on sale? How much is it?

Hi, thank you for your attention. The A100 is expected to release in mid-July, the price hasn't been confirmed yet.

 

[Douk Audio]

How many years of research did your engineers need to find out that a heat sink on top works better for cooling than no heatsink at the bottom?
They sure are on the list for the next Nobel prize.
I hope you have granted a world wide patent for this revolutionary invention?

Hi, thank you for your question, although it doesn't seem so friendly. Although our engineers are not good enough to win the Nobel Prize, they have worked in the HIFI field for many years and designed many good products. In the past, we were always used to adding a heat sink to the power amplifier chip, and we found that this traditional method was difficult to exert the maximum power that the chip itself could reach due to the product volume. We also had designed some amplifiers with TPA3255 chips before. When the output power reached 240W, it would enter overheat protection, so our engineers also studied it for a long time. The A100 can actually reach 300W output. From the actual measurement data, we think that this cooling method will be more efficient because the volume of A100 has not increased. I am not as professional as you or our engineers. I am just a messenger to share and communicate our products with more people. If there is anything wrong, I hope you can point it out in time. Thank you!

 

[Douk Audio]

Sorry, but this is no friendly DIYS guy, but someone who pretends to be an audio expert and does this writing for a living.
So if he writes rediculous stuff about the advantages of his commercial product, someone should tell him. Otherwise the next commercial post will be about even more ridiculous claims why a product should be worth more money than that of a competitor. It is all about money, not sound quality here.

Anyway, with a the usualy supplied 180 Watt power supply, this amp is not able to put out 300+300 Watt in any case. we will need about 10 Amps and 48 Volt to get into that region.
I was so friendly not to comment on the "design" of this product, as this is something very subjective.

Hi, I rechecked my words and still didn't find any problem. If there is anything wrong, please point it out and we will pay attention to it in the future. Thank you again!
We never say that our products are more valuable than our competitors, nor do we mention any competitors. We appreciate our competitors because healthy competition will make us all better, make faster progress, and allow our consumers to buy better products.

I have added above that the 300W output is tested under DC 51V. What I mean is not to declare that our A100 can reach 300W with the equipped power supply, I just want to say that A100 really can reach 300W if the power supply is enough, our other TPA3255 amplifiers cannot do that even input enough power. Maybe I didn't express it accurately enough, which caused you to misunderstand. Sorry.
So I contacted our engineers again and asked them to test it again using the included DC48V/5A power supply. Here is the test
Stereo output:

Mono output:

 

[TonyJZX]

as people have always said all the companies sell the TPA3255 as a "300 x 2" amp

we know its rubbery but that's what the market demands

everyone was slagging off other companies for this and everyone should understand it now

you have enough tests from here and williston to work out how much a tpa3255 can put out

this one should be about that range

Douk deserves respect for posting here where people can be very abrasive but since this place has heaps of experience with the tpa3255 you should know what to expect.

With the 48v 5a psu everyone uses you should know what's coming

Its the proverbial hamberder again - they're all using the same ingredients... its going to plot the same.

 

[Douk Audio]

They said tested at 51V, so obviously not with the supplied PSU.
But completely agree that they should share complete test conditions or shut up

Thank you for pointing out this, I just want to express that A100 can really output 300W if the power supply is enough. I am sorry to cause this misunderstanding. With the supplied power adapter, A100 can max output 160W in stereo mode and 300W in mono mode.

 

[Douk Audio]

as people have always said all the companies sell the TPA3255 as a "300 x 2" amp

we know its rubbery but that's what the market demands

everyone was slagging off other companies for this and everyone should understand it now

you have enough tests from here and williston to work out how much a tpa3255 can put out

this one should be about that range

Douk deserves respect for posting here where people can be very abrasive but since this place has heaps of experience with the tpa3255 you should know what to expect.

With the 48v 5a psu everyone uses you should know what's coming

Its the proverbial hamberder again - they're all using the same ingredients... its going to plot the same.

Hi, thank you for your kindness. I will be more careful with my words in the future posts.

 

[Wolf11Man]

If you want to extract the maximum power from a TPA3255 for prolonged time, you need a copper heat spreader that connects the chip to an aluminum heat sink.
Copper has near twice the heat conductivity of aluminum. So you basically pick the heat from the small chip area by using a copper piece that has a much larger area and then remove it by transfer to a (cheap) aluminum heatsink. Silver would be even better than copper, just a little expensive.
Maybe tell that your engineers, if they find the limits of the usual aluminum heat sink and want more power...
I have even seen heat sinks with a center cooper core for use on CPU's. So nothing new.

 

[MCH]

Thank you for pointing out this, I just want to express that A100 can really output 300W if the power supply is enough. I am sorry to cause this misunderstanding. With the supplied power adapter, A100 can max output 160W in stereo mode and 300W in mono mode.

I appreciate very much you sharing measurements, but again, you need to post the test conditions otherwise these numbers don't mean much. Don't take it wrong, I am just trying to help.
At which load %THD and voltage have you measured 300W in mono mode?
The tpa3255 can indeed output 300W, and even more, but with the same 51V 4ohm that your other measurements were taken.... Hmmmm you are at the very limit, unless you are using now 2 ohm or we are talking 10%THD. Test conditions are everything!!

 

[Guddu]

I appreciate very much you sharing measurements, but again, you need to post the test conditions otherwise these numbers don't mean much. Don't take it wrong, I am just trying to help.
At which load %THD and voltage have you measured 300W in mono mode?
The tpa3255 can indeed output 300W, and even more, but with the same 51V 4ohm that your other measurements were taken.... Hmmmm you are at the very limit, unless you are using now 2 ohm or we are talking 10%THD. Test conditions are everything!!
View attachment 377596

+1

@Douk Audio
It would be meaningful as long as you are specifying test conditions, equipments and parameters.
More to it, best if you do make the psu available as an option for maximum output, like 51v here.

 

[Hot Mason]

So it's not on sale?

 

[Shadow Michael]

How does this product compare to any other product on the market?

 

[Douk Audio]

So it's not on sale?

Hi, the A100 will be on sale in late July if everything goes well, thank you for your attention.