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  1. Atmasphere

    Atmas M-60 with ZU Druid VI

    We had Druids here for a number of years; IMO/IME they were not efficient enough to take advantage of what the best SETs have to offer. Any by 'best' I mean SETs that have full bandwidth, which for the most part means SETs of less than about 8 watts or so. You really do need efficiency when...
  2. Atmasphere

    Atmas M-60 with ZU Druid VI

    If the new Definitions are 16 ohms that is a very nice match for the M-60s. The ZU Audio speakers (and 16 ohms in general) have always worked really well with our amps.
  3. Atmasphere

    "Voicing" and its incidence in audio electronics

    No. We first worked with it on the bench until we were satisfied that it was working better. That change got a variety of tests- noise, gain, distortion and bandwidth; also it was tested to see how wide our margins were with different tubes. Once it was showing an obvious improvement in all...
  4. Atmasphere

    "Voicing" and its incidence in audio electronics

    That is correct. Once you understand what the rules of human hearing are and how that relates to engineering to achieve your goal, its not that hard to insure that it will work if it does what its supposed to do on the bench. To be clear though, we've auditioned parts after checking their specs...
  5. Atmasphere

    Phono cable recommendations?

    The pins of the cartridge are pins 2 and 3 of the XLR. Pin 1 is the tonearm ground and is the same in both channels. In the tonearm DIN connector, pin 3 is the middle pin and that is ground- so the shields of both channels tie there. To put this another way, the DIN connection that you see on an...
  6. Atmasphere

    I am sick of failing amplifiers

    I've bemoaned the simple fact that there is far too little engineering talent in the high end audio world many time. But that doesn't make it better- IMO/IME if I have a complaint, usually the only solution is to get out there and show them how its done.
  7. Atmasphere

    All kc otl/o’clock preamp

    Refers to an integrated circuit (probably an opamp) or a transformer.
  8. Atmasphere

    "Voicing" and its incidence in audio electronics

    We've never voiced our products but we do listen to them once we see that they are performing on the bench.
  9. Atmasphere

    A Parallel High End Adventure and its relationship to High End Audio

    I think there is a parallel in the bicycling world. I decided I wanted to ride the Divide after seeing a movie of the same name. https://vimeo.com/ondemand/14028 Not being a complete idiot (I thought) I paid a local shop for a fitting on my mountain bike. I thought it went fairly well but I...
  10. Atmasphere

    "Voicing" and its incidence in audio electronics

    No. This is the sort of thing you do to find out if you covered all the bases- things such as grounding, reliability, equipment compatability or the like.
  11. Atmasphere

    All kc otl/o’clock preamp

    Having listened to tube preamps with direct-coupled outputs for the last 30 years I can tell you that this is quite true!
  12. Atmasphere

    Does DSP belong in State of the Art Systems?

    This works great in public address where the rooms are significantly longer than the bass frequencies being reproduced- it increases intelligibility. But in a normal room like most audiophiles have, this does not address the standing wave issue. So the peaks and valleys will still be there. A...
  13. Atmasphere

    Does DSP belong in State of the Art Systems?

    I've been talking about a Distributed Bass Array; I was part of a Double Bass Array for many years playing in various orchestras. Either way though, no digital delay is required ;)
  14. Atmasphere

    I am sick of failing amplifiers

    I'm sorry to hear that about tome- he's a great guy.
  15. Atmasphere

    Does DSP belong in State of the Art Systems?

    My apologies- I read that the other 'way 'round. The peaks and valleys would be even smoother if 4 subs were used. A nice side effect due to psycho-acoustics is that when you get the bass right, the mids and highs are immediately seeming to be faster and more transparent.
  16. Atmasphere

    Does DSP belong in State of the Art Systems?

    In saying that you would be incorrect. No amount of DSP can remove a standing wave! And its standing waves that cause problems with bass, especially below 80Hz or so. Standing waves can cause cancellation at certain frequencies so a loss of certain bass notes (along with others being...
  17. Atmasphere

    Does DSP belong in State of the Art Systems?

    Actually a DBA is about 95% effective and DSP with room treatment is the remaining 5% or so, all presented in round numbers of course ;)
  18. Atmasphere

    Does DSP belong in State of the Art Systems?

    It sounds like the intended use is to blend subs and probably deal with bass problems at the same time. One comment that seemed related is this one: So it appears that the idea of fixing bass problems is part of this, at least as others on this thread seem to be talking about. The thing is...
  19. Atmasphere

    DSD to Vinyl Versus Analog Tape to Vinyl

    Yes. What's weird about this is apparently he reported that the bandwidth of the digital recordings was messing with the cutters. Since that literally can't happen, it makes me wonder what's going on.
  20. Atmasphere

    DSD to Vinyl Versus Analog Tape to Vinyl

    The thing here is that the dynamic range of the LP is rarely explored! A silent groove cut in a lacquer is so quiet that it easily rivals the noise floor of Redbook. Until the last few years, it wasn't possible to take advantage of that, since most pressing plants make noisy pressings even...
  21. Atmasphere

    DSD to Vinyl Versus Analog Tape to Vinyl

    Who are the 'very few'?? and who cares what they think? Since I have a recording studio and have made on-location recordings, I only care about how true my system is to that experience. Don't worry about what others think- its your stereo not theirs!
  22. Atmasphere

    DSD to Vinyl Versus Analog Tape to Vinyl

    It can beat tape with ease. Vinyl has the widest bandwidth of any format commonly available (typically to 40KHz on older cutters like mine). Its noise, dynamic range and distortion are both lower than that of any tape format (although to get the benefit of that the playback apparatus really does...
  23. Atmasphere

    DSD to Vinyl Versus Analog Tape to Vinyl

    This is highly unlikely! My cutter (Westerex 3D) goes up to 40KHz easily enough (and is bandwidth limited above that frequency). Microphones don't even have bandwidth that high so what could possibly be up there that is causing a problem?? Digital noise? If so, yikes! We've mastered mostly from...
  24. Atmasphere

    I am sick of failing amplifiers

    There's not going to be heat or dust problems so that's a big help!
  25. Atmasphere

    What an OTL is, and why you should care

    The first and second versions of the toroid backplate had a design bug based on a simulation, which turned out to be incorrect. Hence the toroid two, and why the first to versions were so hard to drive! There was a resistor in them that in order to survive, was rated at 200 watts. So a lot of...
  26. Atmasphere

    I am sick of failing amplifiers

    We just serviced out an Accuphase preamp made back in the 1970s. IMO it was overbuilt insofar as the signal circuitry was concerned, but had nice power supplies and everything plugged into edge connectors- very nice construction. There's no reason tube amps can't be reliable, but in this day...
  27. Atmasphere

    SET amp owners thread

    Actually its 3dB, since adding a 2nd tube in parallel only doubles power.
  28. Atmasphere

    I am sick of failing amplifiers

    That might make it atomic!
  29. Atmasphere

    I am sick of failing amplifiers

    No output transformer and the larger transformers (there are 3 per chassis on most of our amps) are toroids. Because the amps are fully differential and balanced (One of the BAT founders was a customer of ours before they got started; we've been doing balanced operation longer than anyone else...

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