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audio analyzer beta test

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echu:
Is anyone in Taipei part of this beta test? Please PM me if you are.

http://www.screencast.com/t/pQPY7oDNLpT

echu:
I didn't get in the beta because I was outside of US. But I have ordered and received it.

http://www.quantasylum.com/content/Products/QA400.aspx

My first measurement was to compare noise of TL072 and NE5532 using fixed gain of 7. The brief summary is that I can indeed distinguish the noise between these two opamps using this instrument. Distortion measurements seem reasonable too so far.

grenert:
Why BNC connectors for something designed to measure audio?

echu:
It depends mostly on wheter you measure single ended or differential audio. Consumer things is all single end. The guys on diyaudio are making differential amp for QA400.

http://www.diyaudio.com/forums/equipment-tools/231401-quantasylum-qa400.html

If their results are good, then I will try it too.

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