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

[Alexander Lin]

Hi @Alexander Lin

Please also measure D4 so that we may know how much difference is there between the two amplfiers.

O-NOORUS D4 budget stereo amp review

This is a review and detailed measurements of the O-NOORUS D4 stereo integrated amplifier. It was sent to me by the company and costs US$139 from them direct with the 48V/5A power brick. It is fundamentally a small box TPA3255 design with PFFB to give a flat response into any load, but it has...

www.audiosciencereview.com

 

[Alexander Lin]

D3 PRO introduction

1、Hardware configurationDecoding core: AKM AK4493S DAC chip, supports PCM 768kHz / DSD512 native hardware decoding Amplifier module: TI TPA3255 PFFB (pure feedforward feedback architecture) Digital interface: XMOS XU316 USB audio solution, supports ultra-low latency asynchronous transmission...

www.o-noorus.com

Several parameters have been tested.

 

[Audionaut]

Several parameters have been tested.

I think this is the more important information, Alexander.
Can be ordered for 210 USD without power supply.
240 USD for D3 Pro with 48V 5A power supply.

O-NOORUS D3 PRO TPA3255 PFFB Stereo Amplifier and Decoder with HDMI AR

1、Hardware configurationDecoding core: AKM AK4493S flagship DAC chip, supports PCM 768kHz / DSD512 native hardware decoding Amplifier module: TI TPA3255 PFFB, output power 2×300W@4Ω (high efficiency and low distortion) Digital interface: XMOS XU316 USB audio solution, supports ultra-low latency...

www.o-noorus.com

 

[Guddu]

D3 PRO introduction

1、Hardware configurationDecoding core: AKM AK4493S DAC chip, supports PCM 768kHz / DSD512 native hardware decoding Amplifier module: TI TPA3255 PFFB (pure feedforward feedback architecture) Digital interface: XMOS XU316 USB audio solution, supports ultra-low latency asynchronous transmission...

www.o-noorus.com

Several parameters have been tested.

Looking good.

 

[sabih]

That's even more expensive than aiyima a80.

 

[Audionaut]

That's even more expensive than aiyima a80.

So what?

 

[Guddu]

That's even more expensive than aiyima a80.

With better measurements and features, it should not be an issue for many.

 

[ICIETDIYEUR]

I hope ALEXANDER will send one to amirm so he can personally review it

 

[anonyless]

dear O-Noorus, you were over 2 months late to the market, from your original product announcement.
personally I waited until March before buying a D class amp, and only then you disclosed there's a hold up.
honestly I'm glad I didn't wait any longer and got another amp. I hope you're going to offer some major discount to the forum users on this product

 

[Alexander Lin]

dear O-Noorus, you were over 2 months late to the market, from your original product announcement.
personally I waited until March before buying a D class amp, and only then you disclosed there's a hold up.
honestly I'm glad I didn't wait any longer and got another amp. I hope you're going to offer some major discount to the forum users on this product

That's not a problem. ASR_RVYFCV9DM is the discount code, 10% off, valid until May 20th.

 

[Alexander Lin]

I hope ALEXANDER will send one to amirm so he can personally review it

I will send it.

 

[sabih]

Can we get discounts on existing D1 and D4 after launch of this new amplifier?

 

[Alexander Lin]

Can we get discounts on existing D1 and D4 after launch of this new amplifier?

Yes, applicable to D1, D4

 

[sabih]

@Alexander Lin AliExpress is also offering discount tomorrow should I buy or wait?

 

[Totemis]

@Alexander Lin D3 pro has 4 working mode :
D-F mode (decoding mode, The sound source is output from the DAC, bypassing NJW1194, and the volume is not adjustable)
D-B mode (decoding mode, the sound source is output from the DAC, passing through NJW1194, and the volume is adjustable)
A-F mode (amplifier mode, the sound source is output from the DAC, bypassing NJW1194, and the volume is not adjustable)
A-B mode (amplifier mode, the sound source is output from the DAC, passing through NJW1194, and the volume is adjustable)

Please could you confirm A-B mode is for using D3 pro as an only Amplifier (no decoding) using TI TPA3255 PFFB 2x150W with an external Dac ?
Thanks

 

[Alexander Lin]

@Alexander Lin D3 pro has 4 working mode :
D-F mode (decoding mode, The sound source is output from the DAC, bypassing NJW1194, and the volume is not adjustable)
D-B mode (decoding mode, the sound source is output from the DAC, passing through NJW1194, and the volume is adjustable)
A-F mode (amplifier mode, the sound source is output from the DAC, bypassing NJW1194, and the volume is not adjustable)
A-B mode (amplifier mode, the sound source is output from the DAC, passing through NJW1194, and the volume is adjustable)

Please could you confirm A-B mode is for using D3 pro as an only Amplifier (no decoding) using TI TPA3255 PFFB 2x150W with an external Dac ?
Thanks

If you choose RCA input, yes.

 

[Churro]

Has anyone who ordered one of these from the above O-Noorus link received notice that it has shipped? I placed my order 15 days ago and so far mine has not.

 

[jarda-wien]

Has anyone who ordered one of these from the above O-Noorus link received notice that it has shipped? I placed my order 15 days ago and so far mine has not.

I have placed my order 7 days ago and nothing apart from an order confirmation. Maybe there are some manufacturing delays?

 

[Roy_D]

Will there be another discount code for the D3 Pro for use on the o-noorus website again for users of ASR @Alexander Lin ?

 

[Alexander Lin]

Will there be another discount code for the D3 Pro for use on the o-noorus website again for users of ASR @Alexander Lin ?

ASR_RVYFCV9DM ，The discount code is valid again and shipments start this week.