Guddu
Major Contributor
- Joined
- Feb 10, 2020
- Messages
- 1,863
- Likes
- 1,936
Personally speaking, I am not worried about less than 0.5dB variation (peaking in this case) for 8ohm load as shown here for above 10KHz range.
It’s simply negligible for me.
-
Welcome to ASR. There are many reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!
O-Noorus D3 PRO - A new TPA3255 PFFB amplifier with DAC
- Thread starter Audionaut
- Start date
It’s simply negligible for me.
I guess yess...)
ICIETDIYEUR
Addicted to Fun and Learning
People hi 
As Alexander uses an AP (even if it is a model 'below' that of Amirm) then we will see the same thing but in a less pronounced way since he does not use the same abscissa and ordinate scales.
That said, if I have to compare the two devices mentioned above, what I can see for sure, unlike a level difference of +0.5dB at 20KHz (inaudible) under 8 Ohms, is:
- one of them has (too) significant level differences at low listening levels.
- one of them has much fewer functions and above all no (good) incorporated DAC chip at all: I will therefore need an additional DAC while the other can also be used without its incorporated DAC or even as a DAC alone...
- one of them in France costs 124 euros more than the other.
- the 3 'negative' points mentioned above are all combined with the same device.
After this observation, we can choose what we want... or not.
If we are objective, we must be entirely
As Alexander uses an AP (even if it is a model 'below' that of Amirm) then we will see the same thing but in a less pronounced way since he does not use the same abscissa and ordinate scales.
That said, if I have to compare the two devices mentioned above, what I can see for sure, unlike a level difference of +0.5dB at 20KHz (inaudible) under 8 Ohms, is:
- one of them has (too) significant level differences at low listening levels.
- one of them has much fewer functions and above all no (good) incorporated DAC chip at all: I will therefore need an additional DAC while the other can also be used without its incorporated DAC or even as a DAC alone...
- one of them in France costs 124 euros more than the other.
- the 3 'negative' points mentioned above are all combined with the same device.
After this observation, we can choose what we want... or not.
If we are objective, we must be entirely
Guddu
Major Contributor
- Joined
- Feb 10, 2020
- Messages
- 1,863
- Likes
- 1,936
I didn’t understand what you are implying?People hi
As Alexander uses an AP (even if it is a model 'below' that of Amirm) then we will see the same thing but in a less pronounced way since he does not use the same abscissa and ordinate scales.
That said, if I have to compare the two devices mentioned above, what I can see for sure, unlike a level difference of +0.5dB at 20KHz (inaudible) under 8 Ohms, is:
- one of them has (too) significant level differences at low listening levels.
- one of them has much fewer functions and above all no (good) incorporated DAC chip at all: I will therefore need an additional DAC while the other can also be used without its incorporated DAC or even as a DAC alone...
- one of them in France costs 124 euros more than the other.
- the 3 'negative' points mentioned above are all combined with the same device.
After this observation, we can choose what we want... or not.
If we are objective, we must be entirely
Are you referring to the 8ohm frequency plot in picture I posted from O-Noorus website?
Which 2 different devices or amplifiers are you referring to?
Guddu
Major Contributor
- Joined
- Feb 10, 2020
- Messages
- 1,863
- Likes
- 1,936
@Alexander Lin
Can you pls tell the output impedance of D3 Pro?
Can you pls tell the output impedance of D3 Pro?
The output impedance at 1kHz is about 0.04 ohms
Guddu
Major Contributor
- Joined
- Feb 10, 2020
- Messages
- 1,863
- Likes
- 1,936
Extremely good.
I hope average output impedance is around the the same across full spectrum.
ICIETDIYEUR
Addicted to Fun and Learning
People hi 
I received my O-NOORUS D3 PRO since late morning ->
I tried it at home and also at some of my personal relationships who were available.
Here is a summary, entirely subjective, about this device:
- its format is surprisingly small considering all of its possibilities.
- the different functions are rather simple to use although very numerous.
- with its 'only' 48V/5A (GaN) power supply, it is capable of providing much more than sufficient power in 'normal' and domestic use whatever the 'format' of speakers (bookcase or column).
- it has a superb sound, full of details and does not saturate at all (notion of clipping) with the speakers on which it was tested.
In short, everyone would have liked to keep it at home so I told them that it was available from AUDIOPHONICS
They were pleasantly surprised by its price which seemed very affordable and less expensive than the competition although they had all noted its many features.
For my part, I had a good day and what 'came out' seems rather positive for O-NOORUS
Congratulations again Alexander and above all thank you
I received my O-NOORUS D3 PRO since late morning ->
I tried it at home and also at some of my personal relationships who were available.
Here is a summary, entirely subjective, about this device:
- its format is surprisingly small considering all of its possibilities.
- the different functions are rather simple to use although very numerous.
- with its 'only' 48V/5A (GaN) power supply, it is capable of providing much more than sufficient power in 'normal' and domestic use whatever the 'format' of speakers (bookcase or column).
- it has a superb sound, full of details and does not saturate at all (notion of clipping) with the speakers on which it was tested.
In short, everyone would have liked to keep it at home so I told them that it was available from AUDIOPHONICS
They were pleasantly surprised by its price which seemed very affordable and less expensive than the competition although they had all noted its many features.
For my part, I had a good day and what 'came out' seems rather positive for O-NOORUS
Congratulations again Alexander and above all thank you
Guddu
Major Contributor
- Joined
- Feb 10, 2020
- Messages
- 1,863
- Likes
- 1,936
People hi
I received my O-NOORUS D3 PRO since late morning ->
View attachment 475732
I tried it at home and also at some of my personal relationships who were available.
Here is a summary, entirely subjective, about this device:
- its format is surprisingly small considering all of its possibilities.
- the different functions are rather simple to use although very numerous.
- with its 'only' 48V/5A (GaN) power supply, it is capable of providing much more than sufficient power in 'normal' and domestic use whatever the 'format' of speakers (bookcase or column).
- it has a superb sound, full of details and does not saturate at all (notion of clipping) with the speakers on which it was tested.
In short, everyone would have liked to keep it at home so I told them that it was available from AUDIOPHONICS
They were pleasantly surprised by its price which seemed very affordable and less expensive than the competition although they had all noted its many features.
For my part, I had a good day and what 'came out' seems rather positive for O-NOORUS
Congratulations again Alexander and above all thank you
Quick one - How come the volume shown is 30 while volume knob is all the way to max?
ICIETDIYEUR
Addicted to Fun and Learning
Good morning Guddu
Good point
In fact I changed the volume with the remote control and the button is not motorized, it is only 'notched', has a small line on it but it is an 'incremental' volume adjustment: it is a button which can turn indefinitely to the right or to the left and which increases or decreases the volume 'step by step' at each notch.
We can say that the little line on the button is misleading because in fact it does not indicate the real 'position' of the volume, the only value to take into account is that of the display which is 'graduated' from 0 to 80: 0 being the volume at zero.
Note for information that this device does not have any imbalance between the channels given that the volume adjustment is processed digitally (by a NJW 1194) and in equal 'increments' for both channels.
We can therefore listen to it from its smallest level to its loudest without any audible defect or difference in level measured for a given signal of the same amplitude and at the same frequency for both channels
Good point
In fact I changed the volume with the remote control and the button is not motorized, it is only 'notched', has a small line on it but it is an 'incremental' volume adjustment: it is a button which can turn indefinitely to the right or to the left and which increases or decreases the volume 'step by step' at each notch.
We can say that the little line on the button is misleading because in fact it does not indicate the real 'position' of the volume, the only value to take into account is that of the display which is 'graduated' from 0 to 80: 0 being the volume at zero.
Note for information that this device does not have any imbalance between the channels given that the volume adjustment is processed digitally (by a NJW 1194) and in equal 'increments' for both channels.
We can therefore listen to it from its smallest level to its loudest without any audible defect or difference in level measured for a given signal of the same amplitude and at the same frequency for both channels
gnat_leader
Active Member
- Joined
- Oct 15, 2022
- Messages
- 146
- Likes
- 57
@ICIETDIYEUR thanks for the frank but brief subjective opinion. A few questions if you will...
these are just examples of subjective observations that I think helps readers gain knowledge about the quality of a product without the ability to hear it for them self.
Anything else you can add might help.
- What speakers did you use when listening to it?
- How would you describe the music's image it reproduced was it wide and deep (3D)... say compared to other amps you have heard?
- Did it render natural instruments accurately to your ears? ie, did a piano sound real? ... an acoustic guitar, drum, sax,etc. sound like a real instrument in the room or just like a "decent/good playback system"?
- Did it produce little nuances (micro details) in songs you are very familiar with better or worse than some other amps you own or are familiar with?
these are just examples of subjective observations that I think helps readers gain knowledge about the quality of a product without the ability to hear it for them self.
Anything else you can add might help.
Last edited:
ICIETDIYEUR
Addicted to Fun and Learning
Hello everyone
Thank you gnat leader for your interest in my post
I try to be as frank as possible, just like ALEXANDER, whom I know quite well.
You will have noticed that we each have a certain 'clumsiness' in expressing our thoughts correctly at times: both because of the 'language barrier' (English is not our native language) but especially me who can sometimes be 'disturbing' in my words because I am of a rather lively and 'sharp' character...
I take this opportunity to apologize in the form of a 'mea culpa' to the people I may have offended or who I may still offend, although I strive to avoid doing so.
But what do you expect: I am a sincere, objective and logical person and I do not go 'by any means' to express my thoughts while maintaining polite and respectful language even when I disagree.
Also, to clearly clarify the 'situation' in the preamble, I have numerous exchanges with ALEXANDER because we like each other and like to talk about technique and share our ideas but I have no interest (close or legal) with his company O-NOORUS of which of course I am not part (from memory I spoke about it with Amirm during a private message).
Let's just say that I'm a little more 'in the know' than some, that's all.
NB: when it seems that I often put O-NOORUS 'highlighted' it is simply that I am like each of us (customers): we want to obtain the best with the lowest budget (RQP) but above all I am objective and also I know in the smallest details how ALEXANDER feels towards his customers and all the energy, ingenuity and real passion that he commits to satisfy them as best as possible.
He is not a salesman but above all a technician and enthusiast, as I am and that is what drives our understanding.
Anyway, now that I've 'told you about my life' (LOL), let's get back to our subject. ->
I am a technician and not a 'presenter' like salespeople or 'elite YouTubers' so I am not going to use words that are too 'esoteric' but also not too technical either to be most understandable by everyone.
I specify that these are personal and subjective impressions which are also related to the listening conditions but also to my 'auditory memory' since I know the speakers listened to very well since they are models that I had transferred to their new owner, who subsequently became close friends with this common passion.
- JBL studio 230 (manufacturer data: bookshelf-8 Ohms-88dB/W/m-150w max. recommended-6.5' woofer)
NB: I noted it in one of my posts: their response curve is comparable to the ELAC DBR 6.2 with superior power handling for the JBL.
# Nothing in particular to highlight except that the dynamics expected by owners of this type of speaker are there: these small speakers are quite incredible considering their size when they are well supported in amplification and this was the case with the D3 PRO.
- JM LAB PROFIL 7 (manufacturer data: floorstanding-8 Ohms-92dB/W/m-95w RMS-7' woofer)
# Owners of this type of speaker often use them to reproduce classical music, jazz, and small compositions in their preferred musical genre.
I was quite surprised with the D3 PRO because the different little 'nuances' are very clearly perceptible, the notes are very 'detached', a good rendering with the voices and the treble well controlled.
I may be influenced by my preference of listening with 'monitoring' type equipment but I found that we obtained very good results, especially when you know the price at which the O-NOORUS D3 PRO is offered: it is a real bargain with a very high RQP !
- KLIPSCH RF82 II (manufacturer data: floorstanding-8 Ohms-98dB/W/m-150w RMS-dual 8' woofer)
NB: even if the output value (dB) is rather 'fanciful', it is nonetheless true that the latter are much more dynamic than many commercial models.
Owners of this type of 'special' speaker generally have a preference for their very dynamic appearance in terms of sound reproduction (lots of impact).
Their use is often linked to a popular musical style: rock, pop and especially techno/rap, which is also why they are very often encountered in home theater installations.
# Here too, the O-NOORUS D3 PRO does very well: it manages to master the 'complex load' represented by the use of 2 woofers in parallel which tend to cause the impedance of the speakers to drop rather low in the bass and thus 'manhandle' the amplifier which will be associated with them.
We managed to obtain a sound level that was almost unreasonable (impossible to do this if you have neighbors!) although I think that in this case (I did not have measuring instruments) that the use of a 48V power supply in 10A version instead of the 5A proposed 'by default' would allow us to get the full potential of these speakers.
- KLIPSCH RB81 mkII (manufacturer data: floorstanding-8 Ohms-97dB/W/m-150w RMS-8' woofer)
Same remarks for the previous model although it only has a single 8-inch woofer: the 48V/5A (GaN!) power supply supplied 'by default' must be sufficient because the 'worries' posed by the complex load linked to the 2 woofers of the previous model is not present.
- SONY SSG1 -mkII (manufacturer data: floorstanding 3ways-8 Ohms-91dB/W/m-65w RMS-10' woofer)
NB: these are speakers offered in the 80s/90s in the SONY catalog which can be purchased alone or with a complete 'Hi-Fi' set.
In my humble opinion, they are quite versatile and can satisfy their owner's requirements for any listening style.
The technique and the mastery of the latter have evolved a lot since then although SONY is quite ahead of their time if we compare them to today.
I really appreciated having these speakers and the quality of the elements that make them up technically speaking (HP SEAS, large inductors, good capacitors and resistors on a real, well-designed filter).
# nothing special to report regarding listening, the amplifier is perfectly suited to this type of speaker.
The time was spent mainly listening with their various owners, I did not notice any particular 'constraints' or difficulties in using this device and its functions: I will know a little more when they have received theirs from AUDIOPHONICS
I would simply like to point out (once again) that even if ALEXANDER used a very 'dilated' scale which 'grossly' highlights the rise in the treble under a load of 8 Ohms for the sake of transparency towards its customers, nothing of the sort could be observed when listening even with the KLIPSCH speakers with tweeter with 'horn lead' nor with the JBL and their titanium dome tweeter: its latest speakers are often described with highs that can be aggressive depending on the listening conditions and the equipment associated with them.
In summary, for my part, I find that this amplifier is rather 'transparent' and that it is a pleasure to use it with its many functions and all this on a very tight budget: it is quite 'impressive'.
At the risk of repeating myself again, but it is definitely deserved:
Bravo ALEXANDER and thank you for offering us such a complete and affordable device
The technique linked to the qualitative possibilities is well brought together in this amplifier and it is finally accessible to each of us !
Thank you gnat leader for your interest in my post
I try to be as frank as possible, just like ALEXANDER, whom I know quite well.
You will have noticed that we each have a certain 'clumsiness' in expressing our thoughts correctly at times: both because of the 'language barrier' (English is not our native language) but especially me who can sometimes be 'disturbing' in my words because I am of a rather lively and 'sharp' character...
I take this opportunity to apologize in the form of a 'mea culpa' to the people I may have offended or who I may still offend, although I strive to avoid doing so.
But what do you expect: I am a sincere, objective and logical person and I do not go 'by any means' to express my thoughts while maintaining polite and respectful language even when I disagree.
Also, to clearly clarify the 'situation' in the preamble, I have numerous exchanges with ALEXANDER because we like each other and like to talk about technique and share our ideas but I have no interest (close or legal) with his company O-NOORUS of which of course I am not part (from memory I spoke about it with Amirm during a private message).
Let's just say that I'm a little more 'in the know' than some, that's all.
NB: when it seems that I often put O-NOORUS 'highlighted' it is simply that I am like each of us (customers): we want to obtain the best with the lowest budget (RQP) but above all I am objective and also I know in the smallest details how ALEXANDER feels towards his customers and all the energy, ingenuity and real passion that he commits to satisfy them as best as possible.
He is not a salesman but above all a technician and enthusiast, as I am and that is what drives our understanding.
Anyway, now that I've 'told you about my life' (LOL), let's get back to our subject. ->
I am a technician and not a 'presenter' like salespeople or 'elite YouTubers' so I am not going to use words that are too 'esoteric' but also not too technical either to be most understandable by everyone.
I specify that these are personal and subjective impressions which are also related to the listening conditions but also to my 'auditory memory' since I know the speakers listened to very well since they are models that I had transferred to their new owner, who subsequently became close friends with this common passion.
- JBL studio 230 (manufacturer data: bookshelf-8 Ohms-88dB/W/m-150w max. recommended-6.5' woofer)
NB: I noted it in one of my posts: their response curve is comparable to the ELAC DBR 6.2 with superior power handling for the JBL.
# Nothing in particular to highlight except that the dynamics expected by owners of this type of speaker are there: these small speakers are quite incredible considering their size when they are well supported in amplification and this was the case with the D3 PRO.
- JM LAB PROFIL 7 (manufacturer data: floorstanding-8 Ohms-92dB/W/m-95w RMS-7' woofer)
# Owners of this type of speaker often use them to reproduce classical music, jazz, and small compositions in their preferred musical genre.
I was quite surprised with the D3 PRO because the different little 'nuances' are very clearly perceptible, the notes are very 'detached', a good rendering with the voices and the treble well controlled.
I may be influenced by my preference of listening with 'monitoring' type equipment but I found that we obtained very good results, especially when you know the price at which the O-NOORUS D3 PRO is offered: it is a real bargain with a very high RQP !
- KLIPSCH RF82 II (manufacturer data: floorstanding-8 Ohms-98dB/W/m-150w RMS-dual 8' woofer)
NB: even if the output value (dB) is rather 'fanciful', it is nonetheless true that the latter are much more dynamic than many commercial models.
Owners of this type of 'special' speaker generally have a preference for their very dynamic appearance in terms of sound reproduction (lots of impact).
Their use is often linked to a popular musical style: rock, pop and especially techno/rap, which is also why they are very often encountered in home theater installations.
# Here too, the O-NOORUS D3 PRO does very well: it manages to master the 'complex load' represented by the use of 2 woofers in parallel which tend to cause the impedance of the speakers to drop rather low in the bass and thus 'manhandle' the amplifier which will be associated with them.
We managed to obtain a sound level that was almost unreasonable (impossible to do this if you have neighbors!) although I think that in this case (I did not have measuring instruments) that the use of a 48V power supply in 10A version instead of the 5A proposed 'by default' would allow us to get the full potential of these speakers.
- KLIPSCH RB81 mkII (manufacturer data: floorstanding-8 Ohms-97dB/W/m-150w RMS-8' woofer)
Same remarks for the previous model although it only has a single 8-inch woofer: the 48V/5A (GaN!) power supply supplied 'by default' must be sufficient because the 'worries' posed by the complex load linked to the 2 woofers of the previous model is not present.
- SONY SSG1 -mkII (manufacturer data: floorstanding 3ways-8 Ohms-91dB/W/m-65w RMS-10' woofer)
NB: these are speakers offered in the 80s/90s in the SONY catalog which can be purchased alone or with a complete 'Hi-Fi' set.
In my humble opinion, they are quite versatile and can satisfy their owner's requirements for any listening style.
The technique and the mastery of the latter have evolved a lot since then although SONY is quite ahead of their time if we compare them to today.
I really appreciated having these speakers and the quality of the elements that make them up technically speaking (HP SEAS, large inductors, good capacitors and resistors on a real, well-designed filter).
# nothing special to report regarding listening, the amplifier is perfectly suited to this type of speaker.
The time was spent mainly listening with their various owners, I did not notice any particular 'constraints' or difficulties in using this device and its functions: I will know a little more when they have received theirs from AUDIOPHONICS
I would simply like to point out (once again) that even if ALEXANDER used a very 'dilated' scale which 'grossly' highlights the rise in the treble under a load of 8 Ohms for the sake of transparency towards its customers, nothing of the sort could be observed when listening even with the KLIPSCH speakers with tweeter with 'horn lead' nor with the JBL and their titanium dome tweeter: its latest speakers are often described with highs that can be aggressive depending on the listening conditions and the equipment associated with them.
In summary, for my part, I find that this amplifier is rather 'transparent' and that it is a pleasure to use it with its many functions and all this on a very tight budget: it is quite 'impressive'.
At the risk of repeating myself again, but it is definitely deserved:
Bravo ALEXANDER and thank you for offering us such a complete and affordable device
The technique linked to the qualitative possibilities is well brought together in this amplifier and it is finally accessible to each of us !
Last edited:
Not a good point for me !Good morning Guddu
Good point
In fact I changed the volume with the remote control and the button is not motorized, it is only 'notched', has a small line on it but it is an 'incremental' volume adjustment: it is a button which can turn indefinitely to the right or to the left and which increases or decreases the volume 'step by step' at each notch.
We can say that the little line on the button is misleading because in fact it does not indicate the real 'position' of the volume, the only value to take into account is that of the display which is 'graduated' from 0 to 80: 0 being the volume at zero.
Note for information that this device does not have any imbalance between the channels given that the volume adjustment is processed digitally (by a NJW 1194) and in equal 'increments' for both channels.
We can therefore listen to it from its smallest level to its loudest without any audible defect or difference in level measured for a given signal of the same amplitude and at the same frequency for both channels
Alexander has confirmed in a previous post the possibilty to adjust the right and left speaker sound level in the final D3 Pro version ! it seem this is missing ! You know, when we listen stereo music, in many room configuration, we are not listening at the center between left and right speakers.. so, for me is something basic and necessary to have this "balance" setup for a good sound restitution !
@ICIETDIYEUR do you confirm @Alexander Lin They don't implement it in your device ? i don't know if software update is possible or if it's just a bad news !
This feature has always existed.
ICIETDIYEUR
Addicted to Fun and Learning
@ Totemis:
I think you misinterpreted what I was explaining to Guddu.
This has nothing to do with the 'balance' function (existing on 'old Hi-Fi devices) that you are looking for and which exists with this device (D3 PRO) as ALEXANDER so rightly specified in the previous message (and this is not the first time).
Try to follow this discussion thread better and above all pay close attention: this device has many features that many others do not have (I would even say none) so it is easy to be confused by all this information that we are trying our best to convey to you.
Forgive us if this was not the case: we will do as with the devices, we will try to improve ourselves but it is much more difficult for us (LOL)
I think you misinterpreted what I was explaining to Guddu.
This has nothing to do with the 'balance' function (existing on 'old Hi-Fi devices) that you are looking for and which exists with this device (D3 PRO) as ALEXANDER so rightly specified in the previous message (and this is not the first time).
Try to follow this discussion thread better and above all pay close attention: this device has many features that many others do not have (I would even say none) so it is easy to be confused by all this information that we are trying our best to convey to you.
Forgive us if this was not the case: we will do as with the devices, we will try to improve ourselves but it is much more difficult for us (LOL)
gnat_leader
Active Member
- Joined
- Oct 15, 2022
- Messages
- 146
- Likes
- 57
Hello everyone
Thank you gnat leader for your interest in my post
I try to be as frank as possible, just like ALEXANDER, whom I know quite well.
You will have noticed that we each have a certain 'clumsiness' in expressing our thoughts correctly at times: both because of the 'language barrier' (English is not our native language) but especially me who can sometimes be 'disturbing' in my words because I am of a rather lively and 'sharp' character...
I take this opportunity to apologize in the form of a 'mea culpa' to the people I may have offended or who I may still offend, although I strive to avoid doing so.
But what do you expect: I am a sincere, objective and logical person and I do not go 'by any means' to express my thoughts while maintaining polite and respectful language even when I disagree.
Also, to clearly clarify the 'situation' in the preamble, I have numerous exchanges with ALEXANDER because we like each other and like to talk about technique and share our ideas but I have no interest (close or legal) with his company O-NOORUS of which of course I am not part (from memory I spoke about it with Amirm during a private message).
Let's just say that I'm a little more 'in the know' than some, that's all.
NB: when it seems that I often put O-NOORUS 'highlighted' it is simply that I am like each of us (customers): we want to obtain the best with the lowest budget (RQP) but above all I am objective and also I know in the smallest details how ALEXANDER feels towards his customers and all the energy, ingenuity and real passion that he commits to satisfy them as best as possible.
He is not a salesman but above all a technician and enthusiast, as I am and that is what drives our understanding.
Anyway, now that I've 'told you about my life' (LOL), let's get back to our subject. ->
I am a technician and not a 'presenter' like salespeople or 'elite YouTubers' so I am not going to use words that are too 'esoteric' but also not too technical either to be most understandable by everyone.
I specify that these are personal and subjective impressions which are also related to the listening conditions but also to my 'auditory memory' since I know the speakers listened to very well since they are models that I had transferred to their new owner, who subsequently became close friends with this common passion.
- JBL studio 230 (manufacturer data: bookshelf-8 Ohms-88dB/W/m-150w max. recommended-6.5' woofer)
NB: I noted it in one of my posts: their response curve is comparable to the ELAC DBR 6.2 with superior power handling for the JBL.
# Nothing in particular to highlight except that the dynamics expected by owners of this type of speaker are there: these small speakers are quite incredible considering their size when they are well supported in amplification and this was the case with the D3 PRO.
- JM LAB PROFIL 7 (manufacturer data: floorstanding-8 Ohms-92dB/W/m-95w RMS-7' woofer)
# Owners of this type of speaker often use them to reproduce classical music, jazz, and small compositions in their preferred musical genre.
I was quite surprised with the D3 PRO because the different little 'nuances' are very clearly perceptible, the notes are very 'detached', a good rendering with the voices and the treble well controlled.
I may be influenced by my preference of listening with 'monitoring' type equipment but I found that we obtained very good results, especially when you know the price at which the O-NOORUS D3 PRO is offered: it is a real bargain with a very high RQP !
- KLIPSCH RF82 II (manufacturer data: floorstanding-8 Ohms-98dB/W/m-150w RMS-dual 8' woofer)
NB: even if the output value (dB) is rather 'fanciful', it is nonetheless true that the latter are much more dynamic than many commercial models.
Owners of this type of 'special' speaker generally have a preference for their very dynamic appearance in terms of sound reproduction (lots of impact).
Their use is often linked to a popular musical style: rock, pop and especially techno/rap, which is also why they are very often encountered in home theater installations.
# Here too, the O-NOORUS D3 PRO does very well: it manages to master the 'complex load' represented by the use of 2 woofers in parallel which tend to cause the impedance of the speakers to drop rather low in the bass and thus 'manhandle' the amplifier which will be associated with them.
We managed to obtain a sound level that was almost unreasonable (impossible to do this if you have neighbors!) although I think that in this case (I did not have measuring instruments) that the use of a 48V power supply in 10A version instead of the 5A proposed 'by default' would allow us to get the full potential of these speakers.
- KLIPSCH RB81 mkII (manufacturer data: floorstanding-8 Ohms-97dB/W/m-150w RMS-8' woofer)
Same remarks for the previous model although it only has a single 8-inch woofer: the 48V/5A (GaN!) power supply supplied 'by default' must be sufficient because the 'worries' posed by the complex load linked to the 2 woofers of the previous model is not present.
- SONY SSG1 -mkII (manufacturer data: floorstanding 3ways-8 Ohms-91dB/W/m-65w RMS-10' woofer)
NB: these are speakers offered in the 80s/90s in the SONY catalog which can be purchased alone or with a complete 'Hi-Fi' set.
In my humble opinion, they are quite versatile and can satisfy their owner's requirements for any listening style.
The technique and the mastery of the latter have evolved a lot since then although SONY is quite ahead of their time if we compare them to today.
I really appreciated having these speakers and the quality of the elements that make them up technically speaking (HP SEAS, large inductors, good capacitors and resistors on a real, well-designed filter).
# nothing special to report regarding listening, the amplifier is perfectly suited to this type of speaker.
The time was spent mainly listening with their various owners, I did not notice any particular 'constraints' or difficulties in using this device and its functions: I will know a little more when they have received theirs from AUDIOPHONICS
I would simply like to point out (once again) that even if ALEXANDER used a very 'dilated' scale which 'grossly' highlights the rise in the treble under a load of 8 Ohms for the sake of transparency towards its customers, nothing of the sort could be observed when listening even with the KLIPSCH speakers with tweeter with 'horn lead' nor with the JBL and their titanium dome tweeter: its latest speakers are often described with highs that can be aggressive depending on the listening conditions and the equipment associated with them.
In summary, for my part, I find that this amplifier is rather 'transparent' and that it is a pleasure to use it with its many functions and all this on a very tight budget: it is quite 'impressive'.
At the risk of repeating myself again, but it is definitely deserved:
Bravo ALEXANDER and thank you for offering us such a complete and affordable device
The technique linked to the qualitative possibilities is well brought together in this amplifier and it is finally accessible to each of us !
Thanks for taking the time to write up your subjective opinions (review) about this device.
I think this will be helpful information to myself and other people who own similar speakers.
(mine also are high sensitivity with a titanium horn loaded tweeter)
with the high sensitivity 97db/98db speakers it still did not sound overly bright or aggressive? I think that's what you said, correct?
It sounds like you did not get any sense of listening "ear fatigue" or your listening sessions' duration wasn't long enough to know?
Did you hear a convincing 2D or 3D image of decent size with any or all of the speakers?
All speakers had sufficiently good reproduction of the music low-level nuances (micro-details)?
Natural instruments and voices were reproduced in a realistic and "live like" convincing way with all speakers or one was better or worse than the others?
I realize that without doing a real-time A/B comparison you are depending a lot on your memory of how things sounded during the short term listening sessions.
But even if imperfect these opinions are, I still think they could be helpful. More so, if other listeners' opinions corroborate yours.
But next time can you be more "poetic" in your written review? haha... just kidding.
Last edited:
OK, nice ! Good point . Excuse my french... and my misinterpretation from iciedyeur post
Guddu
Major Contributor
- Joined
- Feb 10, 2020
- Messages
- 1,863
- Likes
- 1,936
I can tell you that it does run hot to touch with 48v PSU, probably as hot as Fosi v3 mono or may be a little more.
I have moved it to 36v PSU and it still runs more than warm to touch.
I will have to get something to measure with in order to get some readings though.
Are you trying to decide on it for it’s running temperature?
It would be sitting in a smaller open air space, and I'd rather not have to use a fan.
That said, is the temperature load dependent? I'm planning on running pretty small drivers at reasonably low volumes.
Similar threads
