atmasphere
Responses from atmasphere
| Microphonics, Feedback and Bob Carver That is, the resistance to my fingers or external sources is causing the amplifier to respond with enough current to keep the voltage at zero, so it's not a zero sum game, I think. @erik_squires You exert far more energy with your fingers on th... | |
| A persistent hummmm... Also, the newer PS Audio are not really. Try an oiriginal model PS 300 that totally regenerates the AC, as opposed to current models which allow much of the original mains to be included in the output. @ltmandella There's nothing wrong with th... | |
| Microphonics, Feedback and Bob Carver Sounds like we're talking about the same thing but using different semantics. Since the amp makes the speaker hard to move, it inherently also reduces any audio signal picked up by the diaphragm. Since that motion would be a tiny amount compared ... | |
| Looking for 200 watt Amp to drive Dynaudio Heritage speakers @audio_is_subjective You have a cart to carry your oxen?? | |
| Microphonics, Feedback and Bob Carver I think it is worthwhile to get very specific. The more feedback the less the speaker’s impedance can affect the amplifier’s frequency response. That is, it behaves closer to an ideal voltage source. OK, that part I agree with, but this question ... | |
| Damping Factor and Overall Negative Feedback. Hi, I understand this post is from over 10 years ago, but could you please elaborate further on why, in areas where feedback could be beneficial, a good design calls for minimum or no feedback? It seems like it should be the other way around unti... | |
| JJ preamp tubes - repeated problems Funny with the amount of tube amplifiers I see at shows I hardly see this as the product being in it’s twilight. JJ tubes maybe of questionable quality, or filaments maybe getting damaged in shipping? @audio_is_subjective I used that phrase bec... | |
| Microphonics, Feedback and Bob Carver @erik_squires The more feedback you have, the less the speaker can affect the amp. Feedback allows the amplifier to reject that which is not the signal and microphonic input from the speaker is an example of that. With more feedback also comes gre... | |
| Looking for 200 watt Amp to drive Dynaudio Heritage speakers To me, those impressions are mostly consistent with the current comment, “lack of soul or engagement." @mitch2 Right- but apparently, only holds true for those examples. They don't represent all class D amps any more than saying something lik... | |
| Looking for 200 watt Amp to drive Dynaudio Heritage speakers it seems that lack of soul or engagement is a common theme more so than other critiques. @marco1 I get that- I've experienced that myself. I think that comes from the designer not understanding that just because the amp is high efficiency that ... | |
| A persistent hummmm... The sound comes out of the speakers, AND if you put your ear to toe back left of the amp (where the toroidal transformer is), you can hear it buzzing there, too. @dtorc If I can point out something, it seems as if you are using hum and buzz i... | |
| Value of a preamp? Other than impedance matching and volume control? Preamps also provide any gain needed to drive the power amp. This is handy if you have a tape machine, tuner or phono section. In addition a good preamp will minimize or eliminate colorations c... | |
| Solid State Low powered Amplifiers @moose89 There are now class D amps that don’t take a back seat to tube amps for smoothness and detail in any way. If you get the right one you may find that not only have you solved the heat issue but you may find you don’t want to go back to the... | |
| JJ preamp tubes - repeated problems I'm curious to know if manufacturers test the tubes that they use in the amplifiers before they ship them out? Maybe they test fine and then go bad within a month. I'm very suspicious they don't bother testing their tubes. @emergingsoul They de... | |
| A persistent hummmm... @dtorc An electrician won't be able to help. He'll be out of his league trying to understand why the PS Audio regenerator is able to help. Since it helped only a bit, since you swapped tubes and also sent the unit back, its my surmise that Zesto ... |