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

[Audionaut]

But is it not more similar than different to D4 in some ways?

I've opened a new Thread for that

O-Noorus D3 PRO - A new TPA3255 PFFB amplifier with DAC

I think this is a very interesting amplifier that will soon be on the market. Useful features, PFFB and a decent DAC - a nice complete package. Of course, it would also be nice if an O-Noorus device like this could also be tested by ASR. Pictures and data from the website: 1、Hardware...

www.audiosciencereview.com

 

[MCH]

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

One suggestion: hdmi and the two usb-c connectors are a bit too close. Should be ok when using the right cables but I bet there will be cables that won't fit

 

[capslock]

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

Thanks. I found this:
Amplifier module: TI TPA3255 PFFB (pure feedforward feedback architecture)

I hope it is really post filter feedback and not any kind of feedforward.

 

[ICIETDIYEUR]

People hi

@ ALEXANDER.

It's (near) perfect

You even retained the idea of the TOPPING PS200 DAC with the same black colors for the RCAs jacks but with very clear marking:

you really had a good idea

Little by little you will probably notice that O-NOORUS takes into account as many customer comments as possible to improve but also to offer functions that other brands do not offer:

BRAVO

 

[Alexander Lin]

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...

The balanced signal socket takes up a lot of space and is not suitable for current housings.

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?

Their architectures are different. The D4 uses AK4493S, so its USB sampling rate must be 768KHZ. The USB interface and Bluetooth must be upgraded, otherwise it will be a waste of performance.

 

[Alexander Lin]

One suggestion: hdmi and the two usb-c connectors are a bit too close. Should be ok when using the right cables but I bet there will be cables that won't fit

Often these interfaces are rarely used at the same time, and we have tested them and found that they do not interfere.

 

[Totemis]

The balanced signal socket takes up a lot of space and is not suitable for current housings.




Their architectures are different. The D4 uses AK4493S, so its USB sampling rate must be 768KHZ. The USB interface and Bluetooth must be upgraded, otherwise it will be a waste of performance.

@Alexander Lin Lot of space is not necessary for balanced signal Left/Right if you implement it like treble and bass with the master knob !

 

[mcdn]

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.

That is a huge “if”. The output inductors are critical, as is the component value matching in the feedback network. Input buffers can be done well or badly, especially when tone controls are implemented. The power supply has to be well regulated and have sufficient current and not have excess ripple at high powers. The smoothing caps have to be large enough and have enough temperature and voltage tolerance. The chip itself needs good heatsinking.

That said, from the photos the D4 board looks well executed so hopefully we will have good news soon.

 

[somebodyelse]

@Alexander Lin Lot of space is not necessary for balanced signal Left/Right if you implement it like treble and bass with the master knob !

I think there's a mix up between balance (a control for relative volume of left and right) and balanced (interconnect type, usually with XLR or TRS connectors)

 

[anonyless]

i'm new here but following this thread (and others) for a while,
just wondering if getting back to the original subject (best Ti3255 amp) -
why isn't 3e audio A7(se) in the mix? its price?

 

[Guddu]

i'm new here but following this thread (and others) for a while,
just wondering if getting back to the original subject (best Ti3255 amp) -
why isn't 3e audio A7(se) in the mix? its price?

Let me phrase it slightly differently (with best of my experience and knowledge), 3e A7 and Topping PA7 are two TPA3255 winners. If I have chose between two then probably 3e A7.
Avoiding to find the best is probably the way to go, you might find a product better than another.
I will also add into the mix that manufacturers have started looking at TPA3255 with internal PSU (switching or linear if another differentiator), which might bring a welcome and more desirable change.

 

[Guddu]

Let me phrase it slightly differently (with best of my experience and knowledge), 3e A7 and Topping PA7 are two TPA3255 winners. If I have chose between two then probably 3e A7.
Avoiding to find the best is probably the way to go, you might find a product better than another.
I will also add into the mix that manufacturers have started looking at TPA3255 with internal PSU (switching or linear if another differentiator), which might bring a welcome and more desirable change.

I think I left something behind in my above post.
It’s about comparison, and it’s not fair to compare “DAC+Amplifier” unit with an “Amplifier only” unit.
It’s seems marginally easier to deliver an amplifier with better performance (talking in terms of objective measurements included) than a unit like Aiyima A80 or O-Noorus D3/D4.
I have put together a simple set up for my TV unit using Aiyima A80 and Infinity R162 speakers. Believe me (or not) it’s the best I have got so far with all-in-one DAC+Amplifier unit. Nothing beats it for me in given price.
I am hoping to receive O-Noorus D4 soon which comes with HDMI ARC input.

 

[anonyless]

I think I left something behind in my above post.
It’s about comparison, and it’s not fair to compare “DAC+Amplifier” unit with an “Amplifier only” unit.
It’s seems marginally easier to deliver an amplifier with better performance (talking in terms of objective measurements included) than a unit like Aiyima A80 or O-Noorus D3/D4.
I have put together a simple set up for my TV unit using Aiyima A80 and Infinity R162 speakers. Believe me (or not) it’s the best I have got so far with all-in-one DAC+Amplifier unit. Nothing beats it for me in given price.
I am hoping to receive O-Noorus D4 soon which comes with HDMI ARC input.

thanks for your insights

let's say i want to order in the upcoming weeks TPA3255 amp , with the following requirements:
* 80W per channel at 6ohm
* volume control
* remote control (not a must but would be nice)
* available for sell on Aliexpress
i don't need a DAC, HDMI input, nice display
i can spend up to 250USD, and there are 3e A7's (PS included) available on stock on AE.
with AE sales (that happen every 2 weeks or so) i can probably get its price down to 250 or maybe even wait for A7se to return to stock.
would that be the best choice *for me* , to your opinion? I couldn't find any a7se reviews

 

[Guddu]

I couldn't find any a7se reviews

I wouldn’t worry too much about any 3e’s implementation seeing their reviews/measurements so far.
I have already tested 3e A7 HERE, I have one.
In fact I have used/tested several of these TPA3255 amplifiers before some of them got on Amir’s bench and I think never found any major discrepancy after seeing measurements.

 

[anonyless]

my wrong, all 3e amps are in stock on AE..decision time

 

[douede]

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.

Main chip power caps, and mostly output filter coil and caps make a difference i hear.
Thus that's what i usually tweak...

 

[douede]

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

Normally, PFFB=Post Filter FeedBack
Why is it written " pure feedforward feedback " ?

 

[somebodyelse]

Main chip power caps, and mostly output filter coil and caps make a difference i hear.
Thus that's what i usually tweak...

If it's got PFFB I hope you check the amp is still stable after altering the output filter.

 

[douede]

If it's got PFFB I hope you check the amp is still stable after altering the output filter.

+1 : Components must have similar characteristics; i take care of that...; but with a optimsed PFFB implementation, there is very little room left...