csontos
Responses from csontos
| Influence of DC offset on bias I don't know, maybe but the 105's keep you on the edge of your seat waiting for it to happen and it never does, no sub-audible bottom end at all. I adjust bias on all my amps. I have no auto bias amps. Some don't have adjustable offset. The LSR&am... | |
| Influence of DC offset on bias I have no schematics but the LSR&D amp was designed by Marshall Leach at Georgia Tech University and is the well known Leach Low TIM amp. Few were commercially produced and subsequently became a DIY project for which Dr. Leach provided parts a... | |
| Influence of DC offset on bias Okay, Kirkus, you've clearly discerned that my issue is about what ends up reaching your ears. So is this why I hear an audible imbalance when using my multimeter I achieve identical specs and afterward complete the procedure while listening to mu... | |
| Influence of DC offset on bias OOps. Sorry, Marakanetz. | |
| Influence of DC offset on bias Karakanetz, I appreciate your knowledge on this subject and I don't mean to pester you about this but does offset influence speaker sensitivity? | |
| Influence of DC offset on bias Thank you. That explains why I was disappointed with the 559. 10% is huge. I can easily detect anything that's not identical. Maybe I should be "Golden ears". Pinpoint imaging and transient response and therefore detail absolutely depend on a perf... | |
| Influence of DC offset on bias The amps in question are a pair of LSR&D Superamp monos with no offset pots, AmpzillaII which is a dcservo amp., Son of Ampzilla with both offset and bias pots, and some Bedinis also with no offset pots, a pair of early Boothroyd Stuart Meridi... | |
| Influence of DC offset on bias The pots are there for that very purpose. Channel balance depends on quiescent current being equal in both channels. But my question addresses exactly that issue. Must it be equal or adjusted relative to offset for each channel in order to achieve... | |
| Influence of DC offset on bias I'm referring strictly to SS. Amp has both offset and bias pots. I understand anything up to 50mv offset on each channel is acceptable, 0 being ideal. However, the best I can get is 16mv on the left, 26mv on the right. Bias set at 150ma on each ch... | |
| Likely culprit for harshness at higher volumes? Volume at minimum. Yes, very acceptable. Without bench equipment you cannot get specs for speed, linearity or frequency response but the best way to check those aspects is with your ears. It's really those characteristics we're dealing with when w... | |
| Likely culprit for harshness at higher volumes? Check temp at idle, not while playing music since program material varies from one side to the other. Let it sit for an hour. DC offset is easy. You need a multi-meter. Preamp set on anything other than phono, volume at o, speakers disconnected fr... | |
| Likely culprit for harshness at higher volumes? That's just it. It's not the good one that reveals the amp's true potential nearly as much as the poor one. The amp is the heart of the system. Once you've gotten used to the attributes of your other gear, you then begin listening to, guess what?.... | |
| Likely culprit for harshness at higher volumes? Your Adcom is having difficulty with transients. The poorer the recording, the more apparent this becomes. Try a really good one like say, Lyle lovett's "Natural Forces" or Jimmy Roger's "Allstars", or Ray Charles' "Genius Loves Company". A really... | |
| Amplifiers:A Keeper for Life. Do you know of one ? Hey Gaslover! I haven't heard a Grandson yet, but I've acquired four Sons, an AmpzillaII, and a Gas 500. I've had them all recapped and gone over, with two of the Sons bridged. They are all fabulous, but the amp that knocks my socks off is, believ... | |
| Your First Concert was..... I went to the C.S.N.&Y. concert at Varsity Stadium in Toronto in '74. I was at the top and watched as huge clouds of "smoke" broke away and drifted off. David Crosby knocked Neil Young on his ass on stage when he started ranting about being al... |