atmasphere
Responses from atmasphere
| Pigskin or jico leather mat I have pondered just making one The job of the mat is to control vinyl resonance while the cartridge is tracking the groove, thus preventing the vinyl from talking back to the cartridge. This results in measurably and audibly superior performa... | |
| Cartridge Loading.....Part II I didn’t mention a dead short and was only referring to the two terminal impedance the coil of a cartridge sees. Any reference to ground be it real or virtual does not factor into the load seen by the coils. Surely there has to be an actual input... | |
| Balanced v high-pass You need a set of Jensen ISOMAX boxes set up for XLR in and RCA out. They work great for exactly this sort of thing. https://www.jensen-transformers.com/product/sub-1rr/ Don't be fooled by the one in the photo- they can be ordered with the connec... | |
| Cartridge Loading.....Part II When you consider the proliferation of "current mode" phono inputs in vogue the 5Ω value isn't so strange. Transimpedance phono sections have the cartridge driving the 'virtual ground' of an opamp circuit. That's quite a bit different from driv... | |
| What's a good amount of time to have my preamp unplugged before I swap out tubes? It should be mentioned that this thread's advice is for changing tubes in PREAMPS ONLY, YOU MUST WAIT A FAR LONGER TIME WHEN CHANGING TUBES IN AMPLIFIERS OR RISK ELECTROCUTION. This statement is incorrect, unless the amp has to be opened up a... | |
| Cartridge Loading.....Part II I would say no since the two loadings PM shows for his IMD are 5Ω and 100Ω both of which will surely damp any possible LC resonance which would then eliminate the whole RFI aspect. @intactaudio FWIW 5 Ohms as a load is so low that most cartri... | |
| Competitive class D amp suggestions This is a very strong and challenging statement, especially from a tube amplified producer (i appreciate it very much). I did believe in this a few years ago. Nevertheless, so far, as mentioned earlier in this thread, i did not find a class D amp... | |
| Cartridge Loading.....Part II Isn't that essentially suggesting that compliance has no effect on the sound of a I cartridge? I need to clarify: It has no effect on the output of the coil. It certainly has an effect on the cantilever, and if you look at my prior posts you'll... | |
| GaN amps: Peachtree or LSA Voyager? Tweak1's point is also a good one. As a consumer with little to no background in electronics, most of the displayed specs for any piece of gear are simply beyond my understanding. While I admire all you've done in this industry, I never needed... | |
| I don't want to beat a dead horse but I'm bugged. You posit they'll all sound the same, apparently, you trust the measurements over human sensory perception. We need to be clear about something. You specified that the measurements would be the same, and I have to assume that includes all meas... | |
| Cartridge Loading.....Part II The lower value 200 ohm vs. 47k ohms means more loading which tends to attenuate higher frequencies (because we hear things in terms of overall balance, attenuating highs can also be perceived as more bass). If light loading is entirely added... | |
| 5AR4 rectifier tube question The rectifier tube shouldn’t make any difference in sound. ’Shouldn’t’ is why this statement is true; in practice the rectifier will affect the sound. This is because the rectifier has a voltage drop across it, which varies according to current... | |
| GaN amps: Peachtree or LSA Voyager? My audio experience is quiet extensive, going back some 30 years before I was a partner in Audio Tweakers in the early 2000s. @tweak1 I don’t have a dog in this fight but if I can offer some advice? I’ve found personally that testifying to howe... | |
| I don't want to beat a dead horse but I'm bugged. Ralph what you are referring to in terms of measurements is far removed from what we are presently being provided from these sites and their advocates. I would sincerely welcome legitimate and predictive measurements. @charles1dad ASR is actual... | |
| Competitive class D amp suggestions Atmasphere class d amps can also be interesting. I did not find them on the site and have no idea on preferences made in their design. Neither i know if there are already completed models. Can Ralph provide more detail? I can. Its been the mo... |