Hi everybody!
Did anyone used RMAA to measure the perfomances of a SI T-amp (having separate grounds for left and right speaker)?
Thanks for your help,
Massimo
Did anyone used RMAA to measure the perfomances of a SI T-amp (having separate grounds for left and right speaker)?
Thanks for your help,
Massimo
Found???
Apparently, enough info to answer my question can be found in this RMAA forum thread:
http://forum.rightmark.org/topic.cgi?id=4:592
Ciao!!!
Massimo
Apparently, enough info to answer my question can be found in this RMAA forum thread:
http://forum.rightmark.org/topic.cgi?id=4:592
Ciao!!!
Massimo
Hi mAJORD, thanks for your answer!
Thanks a lot in the anticipation and have a nice evening (is it evening in Australia?)
Massimo
That's fine for me. Would you please confirm me that you measured one channel at a time? Any other recommendation or tip?
Thanks a lot in the anticipation and have a nice evening (is it evening in Australia?)
Massimo
no mate sorry, single ended, and measured symultaneously. I didnt realise the Si amps were diff outputs on each channel?
Hi mAJORD,
sorry for being so incredibly late in answering. We (me an my wife) had some health problems;
nevertheless, I made some homework on this subject...
First of all, Tripath confirmed me that ANY TA2024 amplifier needs two differential buffers (one per channel) to be connected to a single-ended soundcard.
The kind guys of the RMAA forum told me that (but I'm sure you read that) a professional soundcard with a balanced input would allow measuring a TA2024 amp without differential buffer.
In the meanwhile I got in love with the idea that a balanced (H-shaped) attenuator with quite high input and output impedance could allow joining the L and R "cold" terminals together... maybe not 😕
I guess many people (me included) would be happy to read about your setup. Which soundcard? Which attenuator?
Thanks for your answer and sorry for the delay.
Massimo
sorry for being so incredibly late in answering. We (me an my wife) had some health problems;
nevertheless, I made some homework on this subject...First of all, Tripath confirmed me that ANY TA2024 amplifier needs two differential buffers (one per channel) to be connected to a single-ended soundcard.
The kind guys of the RMAA forum told me that (but I'm sure you read that) a professional soundcard with a balanced input would allow measuring a TA2024 amp without differential buffer.
In the meanwhile I got in love with the idea that a balanced (H-shaped) attenuator with quite high input and output impedance could allow joining the L and R "cold" terminals together... maybe not 😕
I guess many people (me included) would be happy to read about your setup. Which soundcard? Which attenuator?
Thanks for your answer and sorry for the delay.
Massimo
HI, hope you're both well now 😛
No I didnt use a differential output.. mine is an AMP1 , using the TA2024, which has single ended outputs. hence not required.
im not sure how you'l get around that problem for your 2022. without making a low noise low distortion buffer to interface it.
-ed forgot to mention, card was at the time a crappy soundblaster Live, but now an E-MU 404.
I am using a voltage divider to attentuate the output over a range of gain. but that is all
No I didnt use a differential output.. mine is an AMP1 , using the TA2024, which has single ended outputs. hence not required.
im not sure how you'l get around that problem for your 2022. without making a low noise low distortion buffer to interface it.
-ed forgot to mention, card was at the time a crappy soundblaster Live, but now an E-MU 404.
I am using a voltage divider to attentuate the output over a range of gain. but that is all
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