atmasphere
Responses from atmasphere
| What is wrong with negative feedback? Acoustat6, that's true. My system can play so loud that prolonged exposure can result in damage. But playing rock as loud as it is often performed has a bugaboo: most rock recordings are anything but live! Quite often the guitar amps have only 15 ... | |
| What is wrong with negative feedback? The loudness perceived compared to actual SPL was most dumbfounding at first especially in that teh IcePower amp power spec is 4X what I had before (500w/ch into 8 ohm compared to 120w/ch prior). Its almost like the additional power is utilized to... | |
| Why not horns? Mapman, for example; singers with 10' mouths.I'm not getting that at all. I find the imaging to be very pinpoint, as good as any cone or line array. | |
| What is wrong with negative feedback? Acoustat6, yes, sometimes I do. Most music does not demand it but some does: The Verdi Requiem, on the Soria box set (RCA) is a good example of vinyl being put the limits, and stereos too. If you play the quiet spots at the correct volume, the pea... | |
| What is wrong with negative feedback? That is true. However I have found the if given the option, people prefer a system that it not bright and harsh, given otherwise that there is no lack of detail, bandwidth and with no tonal aberration.IOW, a proper stereo should lack loudness cues... | |
| What is wrong with negative feedback? That might actually be simpler- the proof in the pudding. Kirkus and I have had plenty of exchanges in the past and I have always respected his demeanor, but at the same time I do not think there is anything that I could say that would change his ... | |
| What is wrong with negative feedback? The source degeneration and drain load resistor are indeed identical mechanisms, and both occur in "real time", it must because the same current flows through both resistors! (see Kirchoff's laws) Yes, they do behave differently, but this is simpl... | |
| Class A/Triode-based preamps I'm curious. Is the volume control before or after the interstage transformer? Is the tube driving the transformer? | |
| To all tube lovers....... I dunno- maybe get rid of a speaker that is not that friendly?If you like tubes, don't buy a speaker that won't work with them. | |
| Class A/Triode-based preamps Triodes are the most linear form of amplification known. Class A operation is also the most linear. So it makes sense that a triode class A circuit will be better, but there are other considerations that affect the outcome! | |
| What is wrong with negative feedback? Kirkus, I do have a problem with this:And then there's the source degeneration resistor R4 . . . this is feedback exactly like R2, no? Why is it somehow more okay?Degeneration occurs in real time against the signal and so is not part of this argum... | |
| What is wrong with negative feedback? 'Current source' is what I call the Power Paradigm, as amps in that category try to make constant power, rather than constant voltage. Its the intention of the designer of the speaker that puts the speaker into the Power camp as opposed to the Vol... | |
| What is wrong with negative feedback? The math is fine right up the 2nd to last paragraph where an assumption is made that is incorrect. It matters a lot what the output section topology is. An excellent example is the difference between a triode gain stage and a cathode follower usin... | |
| Why not horns? Weseixas, it sure looks to me like Duke addressed the issues that you had with my last post. I just have one thing to add, and this is true of digital vs analog, tubes vs transistors, horns vs planars, pretty much you name it in audio:The better t... | |
| What is wrong with negative feedback? Rleff, that is mostly right; damping factor is the ratio of load impedance vs that of the amplifier driving it, and can be increased by adding negative feedback. Some amps achieve a high damping factor with zero feedback, the Ayre is an example of... |