kijanki
Responses from kijanki
| Which matters more, DAC or transport? "Unless you have a bad transport like say a playstation or a cheap DVD player"There is nothing wrong with cheap DVD player as a transport (I use $70 Sony) as long as it is bit transparent (no digital volume control or processing). DVD players have... | |
| Which matters more, DAC or transport? The only difference between good and cheap transport is amount of jitter it produces. Jitter rejecting upsampling DACs like Benchmark have so low jitter bandwidth (few Hz) that at frequency of interest (kHz) jitter rejection is in order of 100dB. ... | |
| MOSFET Bombaywalla - This is a very strange application since IGBTs are used mostly for very fast switching (motor control, switching power supplies etc.). Do you know by any chance why they were used in class A or AB audio amps? | |
| MOSFET Magfan - Isn't HexFet a vertical Mosfet designed for switching (low resistance)? I'm just saying that there is no perfect device. Mosfets have some advantages as well as BJts and tubes. I use class D Rowland amp where Mosfets are a must. | |
| MOSFET "Lower voltage swing from the same voltage supply compared to the BJT implies lower gain" - No it has nothing to do with gain but with characteristic."Lower gain (for the same amount of bias current) compared to the BJT implies lower bandwidth". -... | |
| MOSFET "no need to go onto MHz ranges I believe" In general, to keep things stable output stage should be as fast as possible (little phase shift)and input stage as slow as possible (large phase margin). Power output transistors of modern amplifiers have... | |
| Zero Feedback: Atmasphere vs. BAT Scottlanterman - I read very positive review of Atmasphere (MA-1) but what makes them hot is amount of current that tube heaters consume. Each tube is about 6.3V 2.5A and there is 28 of them total. That equals to 441W dissipated power just for the... | |
| MOSFET There is no perfect device. Mosfets output stages are:- more robust than transistors- have higher bandwidth - are more tolerant of difficult loads but are:- less efficient since have lower voltage swing from the same supply voltage - are more nonl... | |
| S/C: DH Labs Q10 vs Nordost Super Flatline Acdvd - I have shotgun version and never tried regular. Difference should be very small and is speaker dependent. My brother has biwired version of Q-10. Nice cable but not the same class as Satori. Satori is very thick. It uses 6N zero crystal co... | |
| S/C: DH Labs Q10 vs Nordost Super Flatline Acoustic Zen Satori | |
| Who has dumped the power conditioner? Tbg - People who post about their experiences with gear help me a lot to make decisions and learn, while people who say that everything is relative and I should listen to music instead don't help at all. | |
| Amp damping factor? Pauly - I agree. Specifications are very flexible and often misleading. Amplifier (and any other) design is a series of compromises and when you see an amp with exceptionally high DF and extremely low THD something else has to give - the sound. Jo... | |
| Amp damping factor? "An amp doesn't have a damping factor"Pauly - You'll often find DF in amps' specifications. "Having" DF simply means amp has that many times lower output impedance (at given frequency) than assumed 8 ohm speaker. DF is a measure of output impedanc... | |
| Amp damping factor? Deep loop feedback is equivalent to high gain before feedback. With such high gain (in order of thousands)any delay in the signal path (limited bandwidth) results in improper (late) summing of the input and the feedback signal causing TIM - tenden... | |
| Amp damping factor? Atmasphere - also speaker design can make for better quality of bass. As far as I know typical, used in 90% of cases, overhung motor speakers have a lot of distortions at lower frequencies. More expensive underhung speakers,used by some manufactur... |