Recent content by Blumlein 88

  1. Blumlein 88

    Theoretical soures of amplifier distortion

    It all starts with these curves for the basic device. Then you have ways of connecting them and feedback etc. Do any of them have absolutely linear transfer functions which would create zero distortion? Not yet, and probably never, but who knows what might be discovered by clever people in...
  2. Blumlein 88

    Merit in measuring @ 1 watt (first watt performance)?

    If you listen at reference levels averaging mid 80 db spl, you may be averaging around a watt or two, but 20 db headroom means some momentary amounts of 100 watts or so.
  3. Blumlein 88

    Are Electronic Amplifiers a Solved Problem ??

    On this question I've responded elsewhere, that THD of -70 db or better, IMD of -80 db or better and noise of -100 db or better should do the trick. Frequency response should be +/- .1 db from 20 hz to 20 khz.
  4. Blumlein 88

    Are Electronic Amplifiers a Solved Problem ??

    This points out why I don't like Sinad. -60 db Sinad all noise is clearly audible. -60 db all distortion almost surely inaudible. You need to look at distortion and noise separately. You also need to examine frequency response on it's own. Flat enough response, low enough distortion and low...
  5. Blumlein 88

    Audio Science Innovators

    But they actually didn't make sota gear it wasn't even very good. Meaning they sold that story, but their products weren't high quality at all. Their customers didn't get what their story promised. They only got the psychological comfort.
  6. Blumlein 88

    Audio Science Innovators

    I disagree. Another pair whose main achievement is telling a good story.
  7. Blumlein 88

    Audio Science Innovators

    Those go on a list of marketing innovators. Or perhaps a list of top cons.
  8. Blumlein 88

    Suggestions for outdoor (rain) fan, power strip, and extension cord

    Get a heavy duty outdoor electrical cord. Where you plug the box fan lead into this you want to make sure the plug has a good solid grip. Then coat the junction with liquid electrical tape. A good coating is safe enough. You will not get to unplug it after that. But it will be safe...
  9. Blumlein 88

    Cognitive bias regarding names/marketing of dac chips

    In speakers I've always wondered about the Leak Sandwich line.
  10. Blumlein 88

    Suggestions for outdoor (rain) fan, power strip, and extension cord

    They make rain resistant outdoor suitable ceiling fans. They run more like $100-$150. You'll wire them in rather than using an extension cord. Plenty of extension cords are okay left out, but that doesn't mean leaving the ends with plugs where they get rained on. If you enclose that part...
  11. Blumlein 88

    World’s largest nuclear fusion project

    You've heard the term no doubt, "no need to re-invent the wheel". Well I've sort of had the opinion fusion reactors are an attempt to "re-invent the sun". We can use solar cells to collect energy from our nearby working fusion reactor which is the sun. I also think the attraction to create a...
  12. Blumlein 88

    Interview with Bruno Putzey

    That is the one I had in mind.
  13. Blumlein 88

    Interview with Bruno Putzey

    Oh, none were inexpensive. https://www.stereophile.com/content/mbl-reference-9011-monoblock-amplifier-measurements This is one I had in mind. I seem to recall another from Accuphase just can't remember which model. Another which was so low in distortion it was not clear the measurement gear...
  14. Blumlein 88

    Interview with Bruno Putzey

    Not sure what in my comment elicited this response from tuga. I certainly have had the opinion he puts forth for a long time. I could go find several examples just here at ASR of me saying people may like euphony, but it is a mistake to conflate it with superior fidelity. I've even described...
  15. Blumlein 88

    Microphone preamp measurements: How to get the signal level right

    Sure, analog designs have max input levels with certain gain settings specified. The extra step of adding an ADC and seeing what input creates 0 dbFS isn't hard to compare at all. Most specs use A-wtd. Most of the time the spec is to 20 khz only. Depends of course on the particulars...
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