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

[Guddu]

안녕하세요.
이 제품에는 자동 켜짐/꺼짐 기능이 있나요?
예를 들어, USB에 연결된 PC가 켜지면 D3 Pro가 켜지고, OPT에 연결된 TV가 켜지면 D3 Pro가 자동으로 켜지는 기능이 있었으면 좋겠습니다.

No, it doesn’t have auto power-ON.

 

[tarkovskyi]

hello everyone. has anybody experienced Bluetooth malfunction on d3 pro? I've received my amp few days ago and absolutely not able to connect to bluetooth via iphone or appletv. Iphone finds amp, connects to it and in 5-10 seconds automatically disconnects.

 

[nirurin]

I've been considering the Aiyima A80 recently, and then I ran into this thread about the O-Noorus D3 pro which also caught my eye as a similar spec good-looking little dac/amp... though my question becomes, how come this thread seems to be the only information on the internet about it?

I've done the usual google-fu and there seems to be no reviews, no youtube videos, no nothing. Is it known/released under a different name?

I did wonder if it was brand new, but it seems it was released 6+ months ago, which in the timeframe of youtube reviews is basically an entire life cycle of the product!

 

[Guddu]

I've been considering the Aiyima A80 recently, and then I ran into this thread about the O-Noorus D3 pro which also caught my eye as a similar spec good-looking little dac/amp... though my question becomes, how come this thread seems to be the only information on the internet about it?

I've done the usual google-fu and there seems to be no reviews, no youtube videos, no nothing. Is it known/released under a different name?

I did wonder if it was brand new, but it seems it was released 6+ months ago, which in the timeframe of youtube reviews is basically an entire life cycle of the product!

You can ask specific questions here if you want and hopefully you will get the feedback.
Check with @Alexander Lin for any production related questions.

I would say also have a look at their latest one - D4 Pro:
'O-Noorus D4 Pro - TPA3255 PFFB Balanced Amplifier with DAC, HDMI ARC/Sub-Out/LPF/HPF'
https://www.audiosciencereview.com/...fier-with-dac-hdmi-arc-sub-out-lpf-hpf.68009/

 

[nirurin]

You can ask specific questions here if you want and hopefully you will get the feedback.
Check with @Alexander Lin for any production related questions.

I would say also have a look at their latest one - D4 Pro:
'O-Noorus D4 Pro - TPA3255 PFFB Balanced Amplifier with DAC, HDMI ARC/Sub-Out/LPF/HPF'
https://www.audiosciencereview.com/...fier-with-dac-hdmi-arc-sub-out-lpf-hpf.68009/

Interesting. I'll take a look, thanks.

I think mostly at the moment I'm just trying to compare it to something like the Aiyima A80. Though both are looking overkill for my needs. I ended up here after seeing the Aiyima T9 Pro and being tempted by the world of amps and passive speakers.

Slippery slope.

 

[nirurin]

I've been going through the manual, which answered a few of my questions (and has made me lean more towards the D3pro as it has features like a low pass filter that the aiyima amps seem to not have (afaict).

I did have a couple questions though, both of which seem like they've been answered but the answers confused me haha.

1. I'm sure I saw someone ask, and answer, in this thread that you can independently control left and right volume balance on the D3pro, which might be useful to me as my potential new setup will have one speaker a lot closer than the other. I can do it in windows for my PC stuff but it's less easy for other things. None of the other dac/amps I've looked at seem to have this feature either so I guess it's just a rare thing to look for?

2. There's two USB ports on this. This excited me at first because I have more than one device that -can- output sound via usb-C. One of them can also use other things too so it's not a big deal, but being able to use USB for both would be nice. However in the manual it says....

well on one page it calls it another "subwoofer output" port. Which I assume is a typo and it's meant to be 2-5 and not another 2-1. Cos that would be surprising if true lol.

But on another page it says it's for USB sticks only. Which makes more sense, and while a shame I can understand it if its true. Though I do wonder what they did to make it so that only one port works as USB input while the other is for thumb drives... so I'm not sure that's accurate?

However... there's also only a single 'usb' symbol on the inputs list. So if you have both a PC and a USB stick plugged in, how do you switch between them?


Edit:
3. This seems to come with 3 options of power supplies: 36v5a, 48v5a, 48v10a. All of these should be more than enough watts for what I need (for the moment anyway) but I've seen people report on other amps (I think the A80 has it mentioned a few times) that, even when not actually driving speakers, using a higher input supply still causes quite a lot of heat build up. Is this also an issue with the D3pro? Or can I just run one of the 48v supplies and not worry about it? (I have no interest in adding a fan, that seems... a silly workaround).

 

[martin11]

I've been going through the manual, which answered a few of my questions (and has made me lean more towards the D3pro as it has features like a low pass filter that the aiyima amps seem to not have (afaict).

I did have a couple questions though, both of which seem like they've been answered but the answers confused me haha.

1. I'm sure I saw someone ask, and answer, in this thread that you can independently control left and right volume balance on the D3pro, which might be useful to me as my potential new setup will have one speaker a lot closer than the other. I can do it in windows for my PC stuff but it's less easy for other things. None of the other dac/amps I've looked at seem to have this feature either so I guess it's just a rare thing to look for?

2. There's two USB ports on this. This excited me at first because I have more than one device that -can- output sound via usb-C. One of them can also use other things too so it's not a big deal, but being able to use USB for both would be nice. However in the manual it says....

well on one page it calls it another "subwoofer output" port. Which I assume is a typo and it's meant to be 2-5 and not another 2-1. Cos that would be surprising if true lol.

But on another page it says it's for USB sticks only. Which makes more sense, and while a shame I can understand it if its true. Though I do wonder what they did to make it so that only one port works as USB input while the other is for thumb drives... so I'm not sure that's accurate?

However... there's also only a single 'usb' symbol on the inputs list. So if you have both a PC and a USB stick plugged in, how do you switch between them?


Edit:
3. This seems to come with 3 options of power supplies: 36v5a, 48v5a, 48v10a. All of these should be more than enough watts for what I need (for the moment anyway) but I've seen people report on other amps (I think the A80 has it mentioned a few times) that, even when not actually driving speakers, using a higher input supply still causes quite a lot of heat build up. Is this also an issue with the D3pro? Or can I just run one of the 48v supplies and not worry about it? (I have no interest in adding a fan, that seems... a silly workaround).

1. The balance of the right and left channels can be adjusted using the remote control.
2. One USB-C serves as a digital input. The second one is for connecting a USB stick (I haven't tested this), I use it as a power source for the VU meters. A very useful function for me.
3. I use a Mean Well HLG 36V 6.5A for power. The amplifier does not overheat and the power is more than sufficient in a room measuring 4.5 x 5 m.
The remote control needs a little time to understand everything.

 

[Guddu]

I have D3 Pro unit and let me see if I can provide some helpful info.

I've been going through the manual, which answered a few of my questions (and has made me lean more towards the D3pro as it has features like a low pass filter that the aiyima amps seem to not have (afaict).

Correct, Aiyima A80 doesn't have LPF while O-Noorus D3 Pro has LPF. But note that active subwoofers normally have LPF on amplifier board, so if you use it on amplifier then better to set subwoofer board LPF to its max.

I did have a couple questions though, both of which seem like they've been answered but the answers confused me haha.

1. I'm sure I saw someone ask, and answer, in this thread that you can independently control left and right volume balance on the D3pro, which might be useful to me as my potential new setup will have one speaker a lot closer than the other. I can do it in windows for my PC stuff but it's less easy for other things. None of the other dac/amps I've looked at seem to have this feature either so I guess it's just a rare thing to look for?

O-Noorus D3 Pro doesn't have "channel balance" settings. It uses NJW1194 2-channel volume controller and I think the controller itself doesn't have channel balance control if I am not mistaken.
You can control the following on D3 Pro:

2. There's two USB ports on this. This excited me at first because I have more than one device that -can- output sound via usb-C. One of them can also use other things too so it's not a big deal, but being able to use USB for both would be nice. However in the manual it says....
well on one page it calls it another "subwoofer output" port. Which I assume is a typo and it's meant to be 2-5 and not another 2-1. Cos that would be surprising if true lol.

But on another page it says it's for USB sticks only. Which makes more sense, and while a shame I can understand it if its true. Though I do wonder what they did to make it so that only one port works as USB input while the other is for thumb drives... so I'm not sure that's accurate?

However... there's also only a single 'usb' symbol on the inputs list. So if you have both a PC and a USB stick plugged in, how do you switch between them?

One of the USB port is DAC input works very well with any digital device that has USB out capabilities like a phone, PC/laptop, streamers etc.
Another USB port is for USB thumb drive for direct audio media file playback.

The unit has USB1 & USB2 marked on the ports and input selection has U1 & U2 to choose.

Edit:
3. This seems to come with 3 options of power supplies: 36v5a, 48v5a, 48v10a. All of these should be more than enough watts for what I need (for the moment anyway) but I've seen people report on other amps (I think the A80 has it mentioned a few times) that, even when not actually driving speakers, using a higher input supply still causes quite a lot of heat build up. Is this also an issue with the D3pro? Or can I just run one of the 48v supplies and not worry about it? (I have no interest in adding a fan, that seems... a silly workaround).

I would say this is rather same with all such amplifiers. Higher PSU will use slightly more idle power and likewise slightly more heat or power loss which is normal.

 

[martin11]

I apologize, Guddu is right about the balance. I was confused

by the settings in the pictures. I honestly don't know what it's for.

 

[nirurin]

I apologize, Guddu is right about the balance. I was confusedView attachment 498198View attachment 498199 by the settings in the pictures. I honestly don't know what it's for.

Huh, that certainly looks like left and right settings of some sort

 

[martin11]

The adjustment range on them is from -5 to +5. I don't hear any change when moving them throughout the range. Maybe I'm doing something wrong.