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kijanki

Responses from kijanki

Electronics 101: Use of Negative Feedback; a Q
Marakanetz, I think that negative feedback can make amplifier unstable since feedback can easily become positive at higher frequencies, while "no feedback" should be always stable.I agree with Kirkus that there is always some form of feedback. It ... 
Dolby HX PRO Dicrete Circuit.
In short it is servo on the bias as they explained. Tape bias is non audible high frequency recorded with music that reduces distortions of the tape. Bias also reduces upper bandwidth so usually some compromise is taken. Because high frequencies i... 
Amazing sound quality inexpensive earbuds
Mtruong34, I found widest rubbers to expand and clean midrange while smallest rubbers remove most of the bass. Have you tried it? 
Bass leaves after amp warms up?
Csontos, I did read it but never experienced such big effects from wrong bias. There might be some temperature effect on Mosfets' rds(on) but I cannot imagine why amp would suddenly play fine again after changing source or moving speaker wire. I w... 
Bass leaves after amp warms up?
Fishing716, what about amp's power cord? Is it possible that you used the same cord with both amps? Defective cord would be better news than defective house. 
Bass leaves after amp warms up?
Foster_9, that's true, some amps are better than others but his amp plays fine for couple of hours and then looses bass. Switching source or adjusting speaker cable can bring back the bass performance instantly. 
Bass leaves after amp warms up?
I said "to my another house" - it should say "to friend's house".I hope it is the house, as hard as it is to change, because the only alternative is Fishing716 himself (common factor) - musician, 60's, LSD. If that's the case he has to be brought ... 
Bass leaves after amp warms up?
Fishing716 mentioned also on another thread that switching sources can bring back the bass. Same happens when he "adjusts" speaker cables. It would imply bad connection somewhere. It is not amp because he tried two, not source since he switched th... 
At What Age Does An Audiophile Buy His Last Amp?
Mitch4t, Life starts at 60. My mother started driving car at the age of 72. On the other hand I think I'm changing things around but in reality I drive the same car for 17 years, work at the same place for 25 years, live at the same address for 21... 
Amazing sound quality inexpensive earbuds
I'm happy guys that you like them. I would hesitate to recommend anything more expensive because of my limited experience and issues of fitting etc. Thanks to everybody for your response and opinion/evaluation. 
What's your view on blind testing?
Gfcf424892, Difference between two components is often very complex. Judging it in one session, comparing few recordings is not optimal IMHO. I like to keep new gear at least a week to get general feel. I might like it more for one type of music/r... 
Amazing sound quality inexpensive earbuds
Mapman, That's true but pieces here are extremely soft (thin rubber hollow inside) and don't put a lot of pressure. 
Amazing sound quality inexpensive earbuds
Csontos, I'm also leaning toward largest piece that I tried again after Chadnliz post. I'm happy you like it. 
Amazing sound quality inexpensive earbuds
Mapman, Yamaha EPH-100 might be the answer since it seals better by being pushed deeper into ear canal (rubber has to splits). Yamaha claims that smaller driver closer to eardrum produces sound without side reflections making it cleaner. It has go... 
Amazing sound quality inexpensive earbuds
Jp1208, It amazes me that piece of rubber changes sound that much. Smallest rubber kills the bass, split one expands mid-bass making midrange a little congested while largest rubber extends the bass and opens midrange. I agree with Chandliz that h...