Hi,

I’m interesting in building, testing or evaluating audio amplifiers.
It’s not my professional job, but only one of my hobbies.

Currently, I’m the representative manager of a internet cafe, in
the portal site named “Naver”,in Korea.

A internet cafe can be seen as a group of people with the same hobbies.
The following link is to my cafe, but the Korean
Hangul characters may look broken at the other locations.
Google translate may be a helper.

https://cafe.naver.com/diyaudioamp

At first, I started by making analog amplifiers in this cafe,
but recently, I am deeply interested in digital audio as DACs,
audio interfaces, Audio HATs of Raspberry Pi.

My experience in the measurement of audio amplifiers was been started with only simple testers, oscilloscope+generator.
Several years ago I’ve studed Audio Tester, RMAA, and currently studying MI of Virtins Technology.
I use the Adi-2Pro FS R Black Edition as a soundcard of MI, but
I’m a beginner in measurement and test setup, I’m not sure to my test
results.
Finally, I’ve ordered a QA402 to study more on the measurement.
I would like to study fundamental knowledge and ask a number of questions.

Thanks.