Best Ti3255 Amplifier >>>Aiyima? Fosi Audio? O-Noorus?

[ICIETDIYEUR]

Hi

I would add O-NOORUS D3 PRO to my signature when it goes on sale from 05 MARCH

 

[Audionaut]

on sale from 05 MARCH

I'm curious and excited

 

[capslock]

Hi

I would add O-NOORUS D3 PRO to my signature when it goes on sale from 05 MARCH

apparently not

 

[Alexander Lin]

Display panel delivery delay. , so there will be delay.

 

[mcdn]

@Alexander Lin is sending me a D4 to test, so we will have some data soon

 

[Audionaut]

Display panel delivery delay. , so there will be delay.

A great pity
I am looking forward to your premium TPA3255 product without DAC. D5?

Today the AIYIMA 48V 10A GaN power supply will arrive (for O-Noorus D1), which I ordered because I can connect it directly, don't have to get a case or other plugs and it also works on other TPA3255 amplifiers without any problems.

I am always a bit surprised when a power supply with a 480 watt specification is supposed to help the TPA3255 to 2 x 300 watts according to some advertisements, for which it would need 12.5 amps at 48V.
12.5 amps, not even including power loss.

 

[Tristis]

Display panel delivery delay. , so there will be delay.

Mr. Lin, could you give us some specificaton? Maybe it would be a great idea even open a new topic for the D3 PRO amp.

 

[ICIETDIYEUR]

Hi

I think that a specific topic for the O-NOORUS D3 PRO amplifier will surely appear if Mr LIN sends a copy to AMIR and has the time to review it

 

[Audionaut]

Today the AIYIMA 48V 10A GaN power supply will arrive (for O-Noorus D1)

And there it is

Compared to the original O-Noorus power supply unit

I don't think it's that big or rather I had imagined it to be bigger and heavier.

The power supply is ok, but the plug was delivered defective

Fortunately, I have enough of these connection cables here. Amazon would only refund me for the complete package, but then I would wait again. So, what the heck.

Does it sound any different?

Yes, the tried-and-tested slickness of the ASR > subjective sound impressions

But yes, it sounds different and better to my ears - and I'll leave it at that for now.

But: The amplifier is getting warmer

so I'm going to tie this beautiful and completely oversized heat sink to its back.

It still looks like this in my study:

I put the FiiO DAC together with the WiiM mini to the side, although it looks better stacked of course, but since the housing of the O-Noorus is also the heat sink, this is probably the better solution.

Is the larger power supply worth it?

From an economic point of view, the O-Noorus with the standard 36V 5A power supply is a no-brainer and best bang for the buck.

In my opinion, the large Aiyima power supply is worthwhile, but it puts the amplifier into other competitive price ranges - not to mention the heat sink, which I also ordered.

But > It's a hobby

 

[Doodski]

In my opinion, the large Aiyima power supply is worthwhile, but it puts the amplifier into other competitive price ranges

Are there specs and graphs for the power supply output linearity under load?

 

[masterhw]

Am I ignorant? Is the 3e A5 not the best measuring independently tested TI 325x amp? it would make for a much more boring thread but it seems the obvious answer, until its spot is supplanted anyway. The last 2 pages read like a Desperate Dealers forum thread (site's title, not mine).

 

[Audionaut]

Are there specs and graphs for the power supply output linearity under load?

I haven't found or seen any yet

 

[Audionaut]

Is the 3e A5 not the best measuring independently tested TI 325x amp? it would make for a much more boring thread but it seems the obvious answer

One reason for this could be that not all aspirants were tested by ASR.

 

[Doodski]

I haven't found or seen any yet

IC. Any chance you can send in your gear to @amirm for a comprehensive test and analysis under 2 Ohms load to see if the power supply increased the power output and decreases noise?

 

[masterhw]

One reason for this could be that not all aspirants were tested by ASR.

And thats okay, there are other reputable sources (I would mention Archimago) and ways for manufacturers to follow industry standard testing methodologies.
If we're not looking to measurements, I don't know how we can even begin answering the question of "Best Ti3255 Amplifier."
I don't mean to gatekeep to only discussing tested products (which will always be a subset of the total market), but I don't see the use in heavily discussing an O-Noorus amplifier for which I could find no claimed (let alone tested) performance characteristics.

 

[Audionaut]

I don't see the use in heavily discussing an O-Noorus amplifier for which I could find no claimed (let alone tested) performance characteristics

I agree with you that this is not really a stringent thread based on the thread title.
That's partly down to me, because I used it to make a decision for myself and paid less attention to keeping it to the title topic.

Regardless, I don't think there's too much difference in TPA3255 amplifiers that have also implemented PFFB if it's not a totally screwed up board design and reasonably high-quality components have been used, because the main component is and remains the TPA3255 chip from Ti.
This is the main component that “makes the music” and provides the framework - also for the circuits that are created around it.

It is, on a more affordable scale, similar to the Purifi modules and the Marantz PM10 in its exorbitantly beautiful and 15,000 dollar mansion. You can take the principle to extremes, but it won't change the main characteristics of the basic electrical design.

So I don't think I would hear a perceptible difference between an O-Noorus D1 and a 3e Audio amplifier with the same power supply.

 

[Audionaut]

so I'm going to tie this beautiful and completely oversized heat sink to its back

... and I think that will be a good measure, because the surface of the amplifier heats up considerably to a measured 47 degrees Celsius in a 20 degree Celsius room.
Of course, this is all within the specifications of the components and shows that the housing works really well as a heat sink, but I know that cooler working environments are better for electronic components and it can't hurt to add a passive cooling option, because active cooling is an absolute no-go for me with hi-fi equipment.

The heat sink I ordered measures 100x160x40mm (3.94" × 6.30" × 1.57") at 0.7K/W
That should be enough to get into moderate temperature ranges, even if I will use a thermopad for reversible mounting so as not to damage what I consider to be the nice housing of the O-Noorus.

 

[Alexander Lin]

Mr. Lin, could you give us some specificaton? Maybe it would be a great idea even open a new topic for the D3 PRO amp.

Here is a brief introduction： https://www.o-noorus.com/blogs/news/d3-pro-introduction

 

[Totemis]

Thanks Alexander for the D3 Pro news. Nice looking ! smart and original input and output... Max power output ? 300w x 2 ? Treble and bass adjustment are ok, but balance right/left is also very useful in the real life ... For my every day use (at night) an headphone output is really important... an "all in one HiFi smart box" should be my dream...

 

[Guddu]

Here is a brief introduction： https://www.o-noorus.com/blogs/news/d3-pro-introduction

Congrats @Alexander Lin
Specs look very competitive....
.
But is it not more similar than different to D4 in some ways?
- Both have same amplification - TPA3255 PFFB
- Both have digital inputs
- Both have sub out
- Both have tone control, with ByPass
- Both have HDMI ARC
- Same form factor

Differences:
- D3 Pro used AKM4493S while D4 uses ESS9023P, however DAC chip shouldn't make any difference (in theory)
- D3 Pro has additional USB C input for direct disk playback
- D3 Pro has Bluetooth 5.3 while D4 has Bluetooth 5.0

Are you (kind of) advancing D4 with D3 Pro?