Guddu
Addicted to Fun and Learning
- Joined
- Feb 10, 2020
- Messages
- 924
- Likes
- 829
Dear FMs,
I am intending to post User Impressions & Observations here in this User Impressions | Owner's Thread.
pls note that Amir's measurements & review of this amplifier is in queue and awaited.
I created a thread on O-Noorus D1 which captures details like features, internal pics, quick discussions on several aspects, etc. when I came to know about this amplifier first time:
o-noorus-d1-tpa3255-pffb-stereo-amplifier-front-display-tone-control-with-bypass-and-remote
Here, I mean to summarize:
> what I get as a buyer or user of O-Noorus D1 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
*** I hope other O-Noorus D1 users/owners can also sum up their feedback and some work arounds here to help other potential future O-Noorus D1 owners ***
Here is quick snapshot of this amplifier:
> TPA3255 based PFFB implemented topology
> Front panel large display and volume pot with volume control/on/off/mode operation
> 2 Operational Modes
> BP => ByPass mode
> T&B => Tone mode
> Pre-Out with 3.5mm aux, volume controlled by amplifier's volume
> sub-out, with 80 Hz fixed low pass, volume controlled by amplifier's volume
> RCA input
> Remote
> Case Color: RED for now, manufacturer confirmed that BLUE will be available later
Note: RCA inputs only, no xlr/TRS balanced inputs
Price & Availability
> Price seems to be very reasonable, to me, for this amplifier
> seems like manufacturer is not asking for PFFB premium yet!
*** Amplifier is available on AliExpress at the moment, not on Amazon yet.
*** It's available with or with-out power supply
Note: I did not get this amplifier with power supply, and used a 48v 5a power supply all the time without any issues.
Look & Feel:
> Its quite compact profile, more or less similar to size of Topping E50 DAC
> They only have RED color available at the moment, and may make other colors available in future
> Feels 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
Note: RCA input color coding is different than standard, however manufacturer confirmed that next batches would have this corrected.
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
Amplifier Mode: BP: ByPass
> It bypasses tone controls
> Remote becomes almost useless, it can only change mode when amplifier is on BP
> Note: Remote Volume Control on Remote does work in BP mode
Amplifier Mode: T&B: Treble&Bass, Tone Control
> Remote becomes fully functional, volume control on remote works
> Bass & Treble adjustments: -10 to +10 db
> Display LED Color: 1 to 8, 8 different colors
> Brightness: 1 to 3 and A4 => low, med, high and A4: Auto Off after about 10 sec
> Note: If you set A4 and then go back to BP mode, Auto Off still works
Volume Control Knob Operation:
> I found it very good, super smooth and responsive with digital control
> Press long for ON/OFF
> Press quick double to change modes: BP vs T&B
> Note: I could not figure out a way to change tones etc. using volume knob, and could only use remote for that.
Amplifier Internal or PCB Pictures: HERE
> Note: It uses Chemi-con Nippon KY 63v 2200uF capacitors, and dual power supply +-12v for opamps
Size comparison (size is same as O-Noorus D3): HERE
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 just 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 D1 >>>> Speaker Selector >>>> ELAC DBR62 Speakers
PC & nVidia Shield Pro (source) >>>> Topping E50 >>>>balanced out>>>> Fosi v3 Mono Amplifiers >>>> Speaker Selector >>>> 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 (and pre-out as well)
Illusional and Delusional Stuff - How I feel about O-Noorus D1 after listening for few hours
Note: you might want to ignore this part as its purely based on my setup, in-room response and my likings.
There was no huss or noise on full volume on my Elac DBR62 speakers, amplifier was dead silent and clean.
Sound wise, there isn't much to say really, it worked as good as any other amplifier in my setup. it felt detailed and quite balanced to my likings.
Take a look at the following quick freq. sweep captured with mic placed near to speaker, and tell me what can you make out of it:
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 works, but I would personally try to see if a can find a universal remote that works with it
> Sub-Out RCA plug is of RED color coded in my unit, so I mistakenly connected normal RCA input a few times. Not really an issue, but just requires careful connection once
> A faint pop noise is there when switching/changing mode: BP & T&B, and when powering off the amplifier. Its nor sharp noise like many others but it is there.
> 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 D1. 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 many features which aren't there with other PFFB based amplifiers yet.
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 post User Impressions & Observations here in this User Impressions | Owner's Thread.
pls note that Amir's measurements & review of this amplifier is in queue and awaited.
I created a thread on O-Noorus D1 which captures details like features, internal pics, quick discussions on several aspects, etc. when I came to know about this amplifier first time:
o-noorus-d1-tpa3255-pffb-stereo-amplifier-front-display-tone-control-with-bypass-and-remote
Here, I mean to summarize:
> what I get as a buyer or user of O-Noorus D1 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
*** I hope other O-Noorus D1 users/owners can also sum up their feedback and some work arounds here to help other potential future O-Noorus D1 owners ***
Here is quick snapshot of this amplifier:
> TPA3255 based PFFB implemented topology
> Front panel large display and volume pot with volume control/on/off/mode operation
> 2 Operational Modes
> BP => ByPass mode
> T&B => Tone mode
> Pre-Out with 3.5mm aux, volume controlled by amplifier's volume
> sub-out, with 80 Hz fixed low pass, volume controlled by amplifier's volume
> RCA input
> Remote
> Case Color: RED for now, manufacturer confirmed that BLUE will be available later
Note: RCA inputs only, no xlr/TRS balanced inputs
Price & Availability
> Price seems to be very reasonable, to me, for this amplifier
> seems like manufacturer is not asking for PFFB premium yet!
*** Amplifier is available on AliExpress at the moment, not on Amazon yet.
*** It's available with or with-out power supply
Note: I did not get this amplifier with power supply, and used a 48v 5a power supply all the time without any issues.
Look & Feel:
> Its quite compact profile, more or less similar to size of Topping E50 DAC
> They only have RED color available at the moment, and may make other colors available in future
> Feels 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
Note: RCA input color coding is different than standard, however manufacturer confirmed that next batches would have this corrected.
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
Amplifier Mode: BP: ByPass
> It bypasses tone controls
> Remote becomes almost useless, it can only change mode when amplifier is on BP
> Note: Remote Volume Control on Remote does work in BP mode
Amplifier Mode: T&B: Treble&Bass, Tone Control
> Remote becomes fully functional, volume control on remote works
> Bass & Treble adjustments: -10 to +10 db
> Display LED Color: 1 to 8, 8 different colors
> Brightness: 1 to 3 and A4 => low, med, high and A4: Auto Off after about 10 sec
> Note: If you set A4 and then go back to BP mode, Auto Off still works
Volume Control Knob Operation:
> I found it very good, super smooth and responsive with digital control
> Press long for ON/OFF
> Press quick double to change modes: BP vs T&B
> Note: I could not figure out a way to change tones etc. using volume knob, and could only use remote for that.
Amplifier Internal or PCB Pictures: HERE
> Note: It uses Chemi-con Nippon KY 63v 2200uF capacitors, and dual power supply +-12v for opamps
Size comparison (size is same as O-Noorus D3): HERE
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 just 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 D1 >>>> Speaker Selector >>>> ELAC DBR62 Speakers
PC & nVidia Shield Pro (source) >>>> Topping E50 >>>>balanced out>>>> Fosi v3 Mono Amplifiers >>>> Speaker Selector >>>> 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 (and pre-out as well)
Illusional and Delusional Stuff - How I feel about O-Noorus D1 after listening for few hours
Note: you might want to ignore this part as its purely based on my setup, in-room response and my likings.
There was no huss or noise on full volume on my Elac DBR62 speakers, amplifier was dead silent and clean.
Sound wise, there isn't much to say really, it worked as good as any other amplifier in my setup. it felt detailed and quite balanced to my likings.
Take a look at the following quick freq. sweep captured with mic placed near to speaker, and tell me what can you make out of it:
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 works, but I would personally try to see if a can find a universal remote that works with it
> Sub-Out RCA plug is of RED color coded in my unit, so I mistakenly connected normal RCA input a few times. Not really an issue, but just requires careful connection once
> A faint pop noise is there when switching/changing mode: BP & T&B, and when powering off the amplifier. Its nor sharp noise like many others but it is there.
> 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 D1. 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 many features which aren't there with other PFFB based amplifiers yet.
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.
