Guddu
Addicted to Fun and Learning
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- Feb 10, 2020
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Dear FMs,
I am intending to capture User Impressions & Observations for O-Noorus D3 here in this thread, also hope that others can do the same here.
Here, I mean to summarize:
> what I get as a buyer or user of O-Noorus D3 amplifier
> aspects other than measurements that you might be interested in
> testing features & functions to see if there are any issues and how could get around those, if any
> I also hope that this thread could provide some information as to "what to expect" while you are buying this amplifier
There is another thread which I started on discussing this product before getting it, it has more detailed information on product specifications and more:
www.audiosciencereview.com
Here is quick snapshot of this amplifier:
> It's a stereo amplifier with built-in DAC
> TPA3255 based topology
> Front panel large display and volume pot with volume control/on/off operation
> Input: USB C, SPDIF, Coaxial, Aux In, Bluetooth (5.2)
> Sub-out - Volume Control also controls sub-out volume, and it seems to be full bandwidth but I manufacturer confirmed me that they are going to implement 80Hz fixed low pass in future batches
> Accessories: Remote, USB C to A cable, Bluetooth antenna and user manual
> PSU: It is available with a bundled 36v 5a PSU, but I have used a 48v 5a PSU during my testing without any issues
*** It's available with or with-out power supply
> OPAamps gets dual power supply utilization (+- 12v)
> Case Color: RED & BLUE are available - I have D1 in RED and D3 in Blue, and both look very nice, shinier than others with Hi RES sticker on top
Note: no xlr/trs balanced inputs
> Some Internal pics: https://audiosciencereview.com/foru...94-vol-control-with-remote.48247/post-1747761
Price & Availability
> Price seems to be very reasonable, to me, for this amplifier
AliExpress US: https://www.aliexpress.us/item/3256806083735005.html?gatewayAdapt=glo2usa4itemAdapt
O-Noorus portal: https://www.o-noorus.com/products/tpa3255-power-amplifier-300wx2
Look & Feel:
> Its quite compact profile, more or less similar to size of Topping E50 DAC
> I got BLUE but RED color is also available
> Feels a decent case, looks very nice with shiny finish
> Looks cute under my TV. Low profile makes things really easy for placement however speaker cable termination requires some considerations
> Metallic heatsink is pasted onto TPA3255 chip which then also couples it to the chassis bottom, then the whole chassis operates as cooling solution
> Chassis also has ventilation on sides and bottom
Back Panel:
Power Supply & Remote
> It comes with 36v 5a power supply
> 48 - 50v power supply can be used as well, as filter capacitors used are 63v
> Remote provided is rather simple, plastic made
> It does work fine, however personally I feel that they should upgrade and find a better remote
> I have already provided feedback to manufacturer, hope they act
O-Noorus D3 in operation, navigation check
> AliExpress and O-Noorus website has loads of pics and details, but I have found some discrepancies. This might be because of updated firmware or something which I will try to confirm.
> Volume control number range goes from 1 - 80, as oppose to 1 - 60 shown on AliExpress
> Input is only displayed by the input icon at the top, it does not show input as text as shown on AliExpress
> Treble & Bass range shown is correct
> Color options goes up to 20 in my unit, as oppose to 7 as shown on AliExpress.
Idle Power Consumption: Powered ON but no audio playing
> Around 10watts
> Even, It keeps around 10watts if played arrox. up to 70-72 db SPL
Amplifier Case Temperature
> I played it a bit loud for my likings, around 80-85 db and the case remained warm and I didn't think it could be an issue
Note: I used 48v 5a power supply all the time
My Setup, Connectivity and Pairing devices:
PC & nVidia Shield Pro (source) >>>> Topping E50 >>>>RCA out>>>> O-Noorus D3 >>>> ELAC DBR62 Speakers
PC >>>> USB >>>> O-Noorus D3 >>>> ELAC DBR62 Speakers
Sub-Out
> I tested with my ELAC powered sub, it worked fine without any issues
> Amplifier volume control also controls the sub-out
O-Noorus D3 USB Connectivity
PC >>>> USB >>>> O-Noorus D3 >>>> ELAC DBR62 Speakers
> I used generic USB C to USB A cable for connectivity, worked fine
> Windows 11 detected USB connection instantly, no drivers needed
> 32bit 384Kbps max supported, worked very well without any issues
> Windows recognized it has "Headphones"
Hiss Sound on idle or no music
> Very very faint hiss on putting ears on tweeter with USB input, won't notice it if you are just 15 cm away and so I would call it not an issue
> No hiss on SPDIF and Aux Inputs, I did not test Coax or Bluetooth inputs
O-Noorus D3 Power ON/OFF Pop Sound
> Yes, there is very faint pop sound most of the times when it is powered ON. However, it is very faint (other amps like Fosi v3 mono had stronger Pop sound)
> I personally don't think this low faint pop may cause any harm to speakers
Illusional and Delusional Stuff - How I feel about O-Noorus D3 after listening for about a week
Note: you might want to ignore this part as its purely based on my setup, in-room response and my likings.
There was no hiss or noise on full volume on my Elac DBR62 speakers, amplifier was silent and clean except super mild and faint hiss on USB input as I mentioned above.
Sound wise, I found it like SMSL SBC type signature which makes it very likable on low volume, specially with casual TV watching and background music while working.
I found it quite similar to Fosi ZA3's performance in my setup.
Take a look at the following quick freq. sweep captured with mic placed near (less than a feet) to left speaker, and tell me what can you make out of it.
Pls note that this is in-room response in my setup, it has EQ based that I created for room correction for my Topping PA7 amplifier applied and then used in-place for all amplifiers testing.
Purpose is to see the difference only, just for some indicators.
O-Noorus D3 is Blue
Your assessment of the above graph is welcome!
Some considerations and notes:
> Speaker binding post is small, just like other similar amplifiers, and so its more suitable & safe for banana plugs than bare wire or spades
> Remote provided with the package works, but I would personally try to see if a can find a universal remote that works with it
> A faint pop noise is there when amplifier is powered ON, however its very faint to cause any issues to speaker IMO
> I had Topping E50 next to it, and when I used E50's remote to change anything it also showed option moving on O-Noorus D3. It did not change any settings or anything, did not cause any issues but I observed this. To verify, I tried using E50's remote directly on the amplifier and it did not do anything other than browsing menu.
Overall, it is compact good looking amplifier with DAC, and it has more to like if you like other TPA3255 amplifiers in general.
It is RCA input only, no balanced inputs but I personally didn't find it an issue specially on this price.
It performed really good in my setup, can not say anything for long term reliability to be honest but it feels well built except the remote which works but I wish if they could do better.
I am intending to capture User Impressions & Observations for O-Noorus D3 here in this thread, also hope that others can do the same here.
Here, I mean to summarize:
> what I get as a buyer or user of O-Noorus D3 amplifier
> aspects other than measurements that you might be interested in
> testing features & functions to see if there are any issues and how could get around those, if any
> I also hope that this thread could provide some information as to "what to expect" while you are buying this amplifier
There is another thread which I started on discussing this product before getting it, it has more detailed information on product specifications and more:
O-NOORUS D3 - TPA3255 Amp with ES9023P DAC, NJW1194 Vol Control with remote
Another TPA3255 amplifier with decent looking DAC, subwoofer out, digital display and remote control for 150$ to US! This might just be landed on Audiophonics, or may be old, Anyone using this one?
www.audiosciencereview.com
Here is quick snapshot of this amplifier:
> It's a stereo amplifier with built-in DAC
> TPA3255 based topology
> Front panel large display and volume pot with volume control/on/off operation
> Input: USB C, SPDIF, Coaxial, Aux In, Bluetooth (5.2)
> Sub-out - Volume Control also controls sub-out volume, and it seems to be full bandwidth but I manufacturer confirmed me that they are going to implement 80Hz fixed low pass in future batches
> Accessories: Remote, USB C to A cable, Bluetooth antenna and user manual
> PSU: It is available with a bundled 36v 5a PSU, but I have used a 48v 5a PSU during my testing without any issues
*** It's available with or with-out power supply
> OPAamps gets dual power supply utilization (+- 12v)
> Case Color: RED & BLUE are available - I have D1 in RED and D3 in Blue, and both look very nice, shinier than others with Hi RES sticker on top
Note: no xlr/trs balanced inputs
> Some Internal pics: https://audiosciencereview.com/foru...94-vol-control-with-remote.48247/post-1747761
Price & Availability
> Price seems to be very reasonable, to me, for this amplifier
AliExpress US: https://www.aliexpress.us/item/3256806083735005.html?gatewayAdapt=glo2usa4itemAdapt
O-Noorus portal: https://www.o-noorus.com/products/tpa3255-power-amplifier-300wx2
Look & Feel:
> Its quite compact profile, more or less similar to size of Topping E50 DAC
> I got BLUE but RED color is also available
> Feels a decent case, looks very nice with shiny finish
> Looks cute under my TV. Low profile makes things really easy for placement however speaker cable termination requires some considerations
> Metallic heatsink is pasted onto TPA3255 chip which then also couples it to the chassis bottom, then the whole chassis operates as cooling solution
> Chassis also has ventilation on sides and bottom
Back Panel:
Power Supply & Remote
> It comes with 36v 5a power supply
> 48 - 50v power supply can be used as well, as filter capacitors used are 63v
> Remote provided is rather simple, plastic made
> It does work fine, however personally I feel that they should upgrade and find a better remote
> I have already provided feedback to manufacturer, hope they act
O-Noorus D3 in operation, navigation check
> AliExpress and O-Noorus website has loads of pics and details, but I have found some discrepancies. This might be because of updated firmware or something which I will try to confirm.
> Volume control number range goes from 1 - 80, as oppose to 1 - 60 shown on AliExpress
> Input is only displayed by the input icon at the top, it does not show input as text as shown on AliExpress
> Treble & Bass range shown is correct
> Color options goes up to 20 in my unit, as oppose to 7 as shown on AliExpress.
Idle Power Consumption: Powered ON but no audio playing
> Around 10watts
> Even, It keeps around 10watts if played arrox. up to 70-72 db SPL
Amplifier Case Temperature
> I played it a bit loud for my likings, around 80-85 db and the case remained warm and I didn't think it could be an issue
Note: I used 48v 5a power supply all the time
My Setup, Connectivity and Pairing devices:
PC & nVidia Shield Pro (source) >>>> Topping E50 >>>>RCA out>>>> O-Noorus D3 >>>> ELAC DBR62 Speakers
PC >>>> USB >>>> O-Noorus D3 >>>> ELAC DBR62 Speakers
Sub-Out
> I tested with my ELAC powered sub, it worked fine without any issues
> Amplifier volume control also controls the sub-out
O-Noorus D3 USB Connectivity
PC >>>> USB >>>> O-Noorus D3 >>>> ELAC DBR62 Speakers
> I used generic USB C to USB A cable for connectivity, worked fine
> Windows 11 detected USB connection instantly, no drivers needed
> 32bit 384Kbps max supported, worked very well without any issues
> Windows recognized it has "Headphones"
Hiss Sound on idle or no music
> Very very faint hiss on putting ears on tweeter with USB input, won't notice it if you are just 15 cm away and so I would call it not an issue
> No hiss on SPDIF and Aux Inputs, I did not test Coax or Bluetooth inputs
O-Noorus D3 Power ON/OFF Pop Sound
> Yes, there is very faint pop sound most of the times when it is powered ON. However, it is very faint (other amps like Fosi v3 mono had stronger Pop sound)
> I personally don't think this low faint pop may cause any harm to speakers
Illusional and Delusional Stuff - How I feel about O-Noorus D3 after listening for about a week
Note: you might want to ignore this part as its purely based on my setup, in-room response and my likings.
There was no hiss or noise on full volume on my Elac DBR62 speakers, amplifier was silent and clean except super mild and faint hiss on USB input as I mentioned above.
Sound wise, I found it like SMSL SBC type signature which makes it very likable on low volume, specially with casual TV watching and background music while working.
I found it quite similar to Fosi ZA3's performance in my setup.
Take a look at the following quick freq. sweep captured with mic placed near (less than a feet) to left speaker, and tell me what can you make out of it.
Pls note that this is in-room response in my setup, it has EQ based that I created for room correction for my Topping PA7 amplifier applied and then used in-place for all amplifiers testing.
Purpose is to see the difference only, just for some indicators.
O-Noorus D3 is Blue
Your assessment of the above graph is welcome!
Some considerations and notes:
> Speaker binding post is small, just like other similar amplifiers, and so its more suitable & safe for banana plugs than bare wire or spades
> Remote provided with the package works, but I would personally try to see if a can find a universal remote that works with it
> A faint pop noise is there when amplifier is powered ON, however its very faint to cause any issues to speaker IMO
> I had Topping E50 next to it, and when I used E50's remote to change anything it also showed option moving on O-Noorus D3. It did not change any settings or anything, did not cause any issues but I observed this. To verify, I tried using E50's remote directly on the amplifier and it did not do anything other than browsing menu.
Overall, it is compact good looking amplifier with DAC, and it has more to like if you like other TPA3255 amplifiers in general.
It is RCA input only, no balanced inputs but I personally didn't find it an issue specially on this price.
It performed really good in my setup, can not say anything for long term reliability to be honest but it feels well built except the remote which works but I wish if they could do better.
Last edited:
