O-Noorus D1 - TPA3255 PFFB Stereo Amplifier - Front Display, Tone Control (with bypass) and Remote

[Audionaut]

Thanks for the explanation @ICIETDIYEUR

 

[ICIETDIYEUR]

No problem for me, it's with great pleasure

Feel free to ask any more questions

Have a nice day

 

[Totemis]

@daniboun @ICIETDIYEUR​

I was dreaming about a D1 Pro, balanced input, with a better quality knob and output specs near the 3e Audio A7... wake up to me !

 

[ICIETDIYEUR]

-> maybe on a future D5 or D6 model (or D2...) ?

But first we have to wait for the upcoming release of D3 PRO

 

[Audionaut]

was dreaming about a D1 Pro, balanced input, with a better quality knob and output specs near the 3e Audio A7... wake up to me !

Will come soon

we are developing 3 models, D2, D4, D5.
D2 is an upgraded version of D3, with dual PTA3255, better DAC AK449S, USB xmos XU316, ....
D4: It is a three-band (100HZ, 1KHZ, 10KHZ) adjustable and optional bypass mode, multi-input amplifier,
D5 is an upgraded version of D1: balanced input, RCA input, dual tpa3255. It has a larger shell for heat dissipation.

 

[ICIETDIYEUR]

You seem sure you Audionaut...

Ha ! Ha ! Ha !

I don't put the video in a functional test because Alexander will yell at me !!!

(Hello Alexander: the holidays are almost over -> you will have to put the D3 PRO PCBs in their cases )

 

[meta1984]

You seem sure you Audionaut...

View attachment 425909

Ha ! Ha ! Ha !

I don't put the video in a functional test because Alexander will yell at me !!!

(Hello Alexander: the holidays are almost over -> you will have to put the D3 PRO PCBs in their cases )

Give me one !

 

[Totemis]

Why on most recent stereo integrated class D amps using the TPA3255 in symmetrical mode (Fosi, SMSL, Topping, 3eAudio, Aiyima...) we often find a volume adjustment, sometimes bass and treble and never balance adjustments ?. Whereas in real life, we rarely listen in the perfect center of our speakers! Is there a technical difficulty to implement it ?

 

[ICIETDIYEUR]

You're right: I'm going to pull Alexander's ears (the BOSS of O-NOORUS)

 

[Audionaut]

I ordered the D1 before the Chinese New Year (29th January from Dragon to Snake) and it was sended to Germany on 6.2.25, which is OK for me.

But I wonder about its journey through China, when it only has to go to the nearest airport.

 

[Audionaut]

Fly D1 Fly

I will use it together with a WiiM mini and a FiiO BTA30 on Elac loudspeakers in the study.
I am curious.
It's expected to arrive in Liège today and then I expect it to arrive during the week.
It always depends on customs.

 

[Audionaut]

How do I get to the circuit board to change the opamps? How and where is the display connected? Can I simply pull off the control knob?

 

[Audionaut]

Does nobody know that?
I think I've read that some people here have already changed the opamps on the D1 and O-Noorus also writes in the description that they can be changed.
But how? Or better > How do I get to the opamps?

 

[Alexander Lin]

Does nobody know that?
I think I've read that some people here have already changed the opamps on the D1 and O-Noorus also writes in the description that they can be changed.
But how? Or better > How do I get to the opamps?

View attachment 429737

View attachment 429739

There are two screws on the left and right sides of the back and two screws on the bottom. Remove the knob cap at the front and then remove the screw ring. Then slowly pull out the back.

 

[Audionaut]

Then slowly pull out the back.

Thank you very much, Alexander

 

[dr_mick51]

Thank you very much, Alexander

On my experience removing knobs, it's always easier if you use latex or rubber gloves to pull them with your hand instead of using any other "tool".
It works for me and my sweaty hands. And the knobs come out easily because you had a much better grip.

 

[Krampi]

There are two screws on the left and right sides of the back and two screws on the bottom. Remove the knob cap at the front and then remove the screw ring. Then slowly pull out the back.

My cap mods

 

[Krampi]

On my experience removing knobs, it's always easier if you use latex or rubber gloves to pull them with your hand instead of using any other "tool".
It works for me and my sweaty hands. And the knobs come out easily because you had a much better grip.

I could take it off with pliers, I scratched the button. Now I'll buy another one ‍

 

[Krampi]

@Alexander Lin
Please help me, where can I download the user manual? I cannot find on o-noorus.com.
I cannot reach the display Colour & Brightness menu items.
Thank you! K'

 

[Audionaut]

I cannot reach the display Colour & Brightness menu items.
Thank you! K'

In T&B mode
Click OK on the remote control several times until Color and then Brightness appear

Sequence>>>
Mode
Volume
Treble
Bass
Color
Brightness

Use the arrow keys to select the desired