daniboun
Major Contributor
Hi amigos,
Before starting, I suspended the measurements of the first project "Micro Bamboo." I will come back to the quick measurements at the end of May finally, I still have to speak with Sami about his Micro Audio PSU... am focusing on this thread only on the measures of the "Bamboo V2" project which highlights revision B of the 3E Audio module 260-2-29A and a brand new PSU that I found on the web)
This is my very first experience with measurements, by which I mean entrusting a project to a professional with an APx555. I would therefore like to point out that I am not an expert in this field and my knowledge is therefore still limited even if I love learning)
I won't hide from you that I had a sinking feeling in my stomach when I shipped my amps to the German lab. First I was afraid that it would go wrong and I admit that I have little confidence in the carriers (we use “Colissimo”, the French post office in France). I was also apprehensive about the results of the measurements since I had absolutely no knowledge of this German Lab before. I was also apprehensive about the results of the measurements since I discovered this German Lab by chance.
But then who is behind this lab? It is in fact in its official name Dr-Jordan-Design whose owner is Frank). He is based in Dresden (for those who know the duo band “Dresden Dolls” which I love by the way!) I entrusted this measurement project to Frank because it is the only lab I found in Europe which has an APx555 and which offers these measurements as a service. You will understand that French laws regarding exports and shipping outside Europe are so expensive and complicated; that I had to find an ASR equivalence in Europe....
About @docjordan :
"My name is Frank Jordan, located in Germany, Dresden. Most people call me ‘docjordan’, simply because I studied electrical engineering in Hamburg and I have PhD on communication systems. My professional work with audio started mid 1990s. In 2000 I finished my PhD on digital communication systems.
From a first sight this has nothing to do with audio, but the research work on signal processing was very useful for audio. Look e.g. at audio compression techniques like mp3, or the STI measurement method
In general, I cover all range of audio starting with infra-sound up to ultra-sonic, room- and building acoustics and psycho-acoustics. Special focus is on ISO/IEC/DIN compliant measurements.
Most of my work is software development using most of modern languages. Focus is DSP and audio measurements.
I own a very well-equipped lab for audio and acoustic measurement including all premium brand tools. This includes an APX555 which is the heart of my measurements. As a special, I did deep reverse engineering of the APX-Framework and offer independent plugins for special measurements. I have a good communication loop with AP (Greetings to Dan Knighten), but there is no business interaction (although I enjoy working with their products), I’m working 100% independent.
Since 2002, I own a small business called “Dr-Jordan-Design”.
www.akustik-messen.de
www.akulap.de (webshop)
My focus is audio measurements, from software, microphones to turnkey solutions.
I engineer professional audio measurement systems. In addition to my core product (Akulap), a software based real-time analyzer, I offer turn-key solutions including all hardware (calibrators, interfaces, microphones, loudspeakers, sound level meters etc.).
I cover a wide range of applications e.g. room acoustics, building acoustics, long-term sound monitoring, production tests and my special focus is psycho-acoustics and many more
I develop stand-alone software e.g. Akulap and plugins for the APX audio analyzer series from Audio Precision
In addition, I offer full custom solutions in the area of measurement and digital signal processing.
For non-commercial applications and education facilities I offer my software products at special conditions.
Due to my large experience for many years, I offer measurements as a service."
I also wanted to take advantage of this thread to thank several members :
@docjordan > Many thanks for your professionalism and patience!
@SylphAudio > you have superb knowledge thank you!
@antcollinet > I think you are an excellent theoretician, thank you for your help.
@oal > I loved your review of the SylphD100, it inspired me a lot
@3eaudio > Your modules are excellent, continue to develop them)
@MicroAudio > Thank you for your collaboration
Test protocol:
Audio Analyser 1 : APx555 + Passive filter (Aux-0025)
Default filter : AES17 20Khz.
Amplifier: Bamboo V2
3E Audio 260-2-29A Stéréo REB B (OPA1656)
PSU : Yongzhuxing 600W PFC /LLC @48V
Extra Caps module Connex LPS212A (4X 4700uf)
Before going on, I would like to point out that Frank measured the Aiyima A07 and his results agree with those of Amir. Which is a guarantee of consistency)
Please note that the measurements were carried out with the Extra caps Connex module.
Let’s start with the first usual dashboard :
Conclusion :
It is interesting to note that the PSU may have a slight impact on the Sinad.
This Rev B of the 3E Audio 260-2-29A Module remains faithful to the performances measured on the Rev A. The addition of an Extra caps module does not provide anything very convincing. Performance is excellent considering the overall value for money.
Subjective listening : It's almost impossible to hear the difference between revision A and B of the 3E Audio module... My HD playlist sounds very good with both configurations)
For those who wish to embark on such a project, do not hesitate to ask me for advice, it will always be a pleasure)
Before starting, I suspended the measurements of the first project "Micro Bamboo." I will come back to the quick measurements at the end of May finally, I still have to speak with Sami about his Micro Audio PSU... am focusing on this thread only on the measures of the "Bamboo V2" project which highlights revision B of the 3E Audio module 260-2-29A and a brand new PSU that I found on the web)
This is my very first experience with measurements, by which I mean entrusting a project to a professional with an APx555. I would therefore like to point out that I am not an expert in this field and my knowledge is therefore still limited even if I love learning)
I won't hide from you that I had a sinking feeling in my stomach when I shipped my amps to the German lab. First I was afraid that it would go wrong and I admit that I have little confidence in the carriers (we use “Colissimo”, the French post office in France). I was also apprehensive about the results of the measurements since I had absolutely no knowledge of this German Lab before. I was also apprehensive about the results of the measurements since I discovered this German Lab by chance.
But then who is behind this lab? It is in fact in its official name Dr-Jordan-Design whose owner is Frank). He is based in Dresden (for those who know the duo band “Dresden Dolls” which I love by the way!) I entrusted this measurement project to Frank because it is the only lab I found in Europe which has an APx555 and which offers these measurements as a service. You will understand that French laws regarding exports and shipping outside Europe are so expensive and complicated; that I had to find an ASR equivalence in Europe....
About @docjordan :
"My name is Frank Jordan, located in Germany, Dresden. Most people call me ‘docjordan’, simply because I studied electrical engineering in Hamburg and I have PhD on communication systems. My professional work with audio started mid 1990s. In 2000 I finished my PhD on digital communication systems.
From a first sight this has nothing to do with audio, but the research work on signal processing was very useful for audio. Look e.g. at audio compression techniques like mp3, or the STI measurement method
In general, I cover all range of audio starting with infra-sound up to ultra-sonic, room- and building acoustics and psycho-acoustics. Special focus is on ISO/IEC/DIN compliant measurements.
Most of my work is software development using most of modern languages. Focus is DSP and audio measurements.
I own a very well-equipped lab for audio and acoustic measurement including all premium brand tools. This includes an APX555 which is the heart of my measurements. As a special, I did deep reverse engineering of the APX-Framework and offer independent plugins for special measurements. I have a good communication loop with AP (Greetings to Dan Knighten), but there is no business interaction (although I enjoy working with their products), I’m working 100% independent.
Since 2002, I own a small business called “Dr-Jordan-Design”.
www.akustik-messen.de
www.akulap.de (webshop)
My focus is audio measurements, from software, microphones to turnkey solutions.
I engineer professional audio measurement systems. In addition to my core product (Akulap), a software based real-time analyzer, I offer turn-key solutions including all hardware (calibrators, interfaces, microphones, loudspeakers, sound level meters etc.).
I cover a wide range of applications e.g. room acoustics, building acoustics, long-term sound monitoring, production tests and my special focus is psycho-acoustics and many more
I develop stand-alone software e.g. Akulap and plugins for the APX audio analyzer series from Audio Precision
In addition, I offer full custom solutions in the area of measurement and digital signal processing.
For non-commercial applications and education facilities I offer my software products at special conditions.
Due to my large experience for many years, I offer measurements as a service."
I also wanted to take advantage of this thread to thank several members :
@docjordan > Many thanks for your professionalism and patience!
@SylphAudio > you have superb knowledge thank you!
@antcollinet > I think you are an excellent theoretician, thank you for your help.
@oal > I loved your review of the SylphD100, it inspired me a lot
@3eaudio > Your modules are excellent, continue to develop them)
@MicroAudio > Thank you for your collaboration
Test protocol:
Audio Analyser 1 : APx555 + Passive filter (Aux-0025)
Default filter : AES17 20Khz.
Amplifier: Bamboo V2
3E Audio 260-2-29A Stéréo REB B (OPA1656)
PSU : Yongzhuxing 600W PFC /LLC @48V
Extra Caps module Connex LPS212A (4X 4700uf)
Before going on, I would like to point out that Frank measured the Aiyima A07 and his results agree with those of Amir. Which is a guarantee of consistency)
Please note that the measurements were carried out with the Extra caps Connex module.
Let’s start with the first usual dashboard :
Conclusion :
It is interesting to note that the PSU may have a slight impact on the Sinad.
This Rev B of the 3E Audio 260-2-29A Module remains faithful to the performances measured on the Rev A. The addition of an Extra caps module does not provide anything very convincing. Performance is excellent considering the overall value for money.
Subjective listening : It's almost impossible to hear the difference between revision A and B of the 3E Audio module... My HD playlist sounds very good with both configurations)
For those who wish to embark on such a project, do not hesitate to ask me for advice, it will always be a pleasure)
