atmasphere
Responses from atmasphere
| Amplifier circuitry-4 ohm vs 8 ohm I believe tubes represent a more even profile of the harmonics, elevating the harmonics in the upper range better than solid state. @emergingsoul This is incorrect. Tube amps tend to make more the lower ordered harmonics, the 2nd and 3rd, whi... | |
| Amplifier circuitry-4 ohm vs 8 ohm I've looked at many tube amplifiers. Interested to know which solid state amplifiers achieve the same goal as tubes? @emergingsoul In my experience, not very many! But I am playing a class D amp at home that has the same distortion spectra as y... | |
| Question about how analog audio recording works I've wondered this same thing about speakers. How does a single driver replicate sounds of different freq. at the same time without stepping on itself and smearing one or the other? @dweller Full range drivers are not an example. They fall all... | |
| 300b lovers Zero NFB seems to uncover a masking effect. @charles1dad That's not quite correct. It depends on how well the feedback is executed and as I've been pointing out a lot recently, with most amps made in the last 70 years or more that's not happene... | |
| 300b lovers The difference is Class D switches at 100 kHz or higher, with pulse width translating to signal level, while Class A is non-switching and like a preamp, fully analog from start to finish. @lynn_olson most quality class D amps switch at 500KHz o... | |
| Amplifier circuitry-4 ohm vs 8 ohm Implied, but so far not stated specifically, is that the output tubes of an amplifier need to see a high load of several thousand ohms (the exact value depends on the tube and amp design.) If you run an output tube straight into a speaker, wheth... | |
| Atma-Sphere Class D… Amazing Are you still planning to build a version with somewhat higher power output? We started with 100 W into 8 Ohms, 200 into 4 simply because if you really need more power than that your speaker is impractical. The exception seems to be ESLs like t... | |
| Atma-Sphere Class D… Amazing Thanks for any further thoughts based on your extended experience with the A-S Class D amps. @sdl4 There is a review in this month's (June 2023) HiFi+ magazine. The reviewer had given us a very nice review of our M-60 triode OTLs about 2 years... | |
| Is there a 300B type amp out there with some WATTS behind it? I understand one way to tackle the issue of using SET amps is with high sensitivity speakers. Is there a 300B or something that gives you that same sound out there with power so you have more speaker options? @audiovicker You have put your fi... | |
| Amplifier circuitry-4 ohm vs 8 ohm However, I do recall that the late Roger Modjeski (RAM Labs Music Reference Audio) advocated “light loading” of amplifiers. @charles1dad Roger's amps were designed so this technique could be used. Most amps are not. Roger's amps also used feed... | |
| Amplifier circuitry-4 ohm vs 8 ohm What if the speaker has a nominal impedance of 6 ohms? Which tap (4 or 8) should be used since the load is right in the middle of the two windings? @dspringham Try it on both. If you have access to the impedance curve of the speaker, look at th... | |
| Amplifier circuitry-4 ohm vs 8 ohm The single amplifier at some point splits the signal going into either one of these Ports. What differences are there in the circuitry? Maybe this will help me better understand the difference between these two taps. I believe 4 ohms is a wider ... | |
| Amp question with size constraints I had assumed that Class Ds would be a step down though that increasingly seems to be a prejudice. It is, but started from class D amps being poorly executed 10-20 years ago. Things have improved- class D amps are now able to sound as good as t... | |
| 300b lovers There is a simple and inexpensive means of dealing with heat due to amplification. Ducts in the ceiling above the amplifier(s) can be added, along with dryer style hose the connects via a squirrel fan to the outside. This can be installed for a fe... | |
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