Recent content by Blumlein 88

  1. Blumlein 88

    Pre-amp for active digital / analogue speakers

    I don't have the files up anymore, but have made available the original digital files and an 8th gen copy that has been through 8 AD and DA stages. I believe even Amir couldn't hear them as different except for a tale in one file that hadn't been edited correctly. I understand people having...
  2. Blumlein 88

    When does a loudspeaker get too big for a room?

    With cone and dome box speakers that are large you may need some distance for good integration of all the drivers or so the common wisdom is. Small monitors are made for near field listening like 1-2 meters. Some others are termed mid-field monitors. My rule of thumb, totally my own, so maybe...
  3. Blumlein 88

    Genelec on audio science

    Your analogy would only be accurate for headphone listeners. Stereo doesn't have the separated presentation to each ear that 3d glasses have when listening over speakers.
  4. Blumlein 88

    Genelec on audio science

    I tried this a few times. Once with Acoustat Two's up front and a pair of Maggie MG2's in the rear. I quickly gave it up too. I later retried it with an early digital delay unit that delayed only the rear channels for the purpose of Hafler setup. Didn't like it either. It was better than no...
  5. Blumlein 88

    Two vintage Technics amps measured: SU-V900 and SU-V90D

    Gave my brother the big brothers to this for Christmas way back when. The C2 Control amp and M80 power amp from the natural sound series. Those still work and sound good. Maybe I can borrow it and measure it some time. I remember the C2 had a fantastically quiet and clean phono stage.
  6. Blumlein 88

    Which DAC measurements do you like to see next?

    Well this might sort of give you a little faith in mics though not answering your questions. Here are two different $150 each Avantone CK-1 microphones. I measured a speaker sitting in a room so the response variation is from the speaker. I put each microphone as close to the same exact...
  7. Blumlein 88

    Which DAC measurements do you like to see next?

    To elaborate on Amir's reply. Imagine that noise is random at any given frequency (which of course it is). So to pick a frequency let us say 1000 hz. Noise at one thousand hertz in one device might be out of phase or a slightly different level than in another device. So noise at 1000 hz will...
  8. Blumlein 88

    Comparing aliasing in three ADCs.

    @soundArgument post convinced me to check out 96 khz aliasing since it was fairly easy to do. First white noise high pass filtered at 27 khz. Again the presence of noise above the band covered by the ADC raised the noise floor some. The two Focusrite ADCs were up about 3 db just like when...
  9. Blumlein 88

    Genelec on audio science

    I'm a fan of M-S too. I have a Lewitt TS640 which allows me to choose the pattern after the recording is done. Combined with a bi-directional microphone it will let me choose patterns, direction and number of channels after the fact. So I could have double MS and coincident 5 cardioids or...
  10. Blumlein 88

    Genelec on audio science

    We have a zone of confusion of about 45 degrees directly right and left of our head. Sound in these areas is very difficult for us to place with any precision. In real life if something of interest happens in those zones we of course rotate our head to find out where it is. One can record 4...
  11. Blumlein 88

    Best movie of the decade

    Just say NO!
  12. Blumlein 88

    Best movie of the decade

    Just say NO!
  13. Blumlein 88

    Comparing aliasing in three ADCs.

    Thought it would be interesting to see how much aliasing there is in some ADCs. The three ADCs compared were a Focusrite 18i20 recording interface, Focusrite Forte recording interface, and Antelope Audio Zen Tour recording interface. The source of the signals used is a TC IMpact Twin running at...
  14. Blumlein 88

    Genelec on audio science

    Ahhhh!................so you summarily dismiss the mono(phile)theists among us. :) No comb filtering, no preferred listening position. So many issues never even have the chance to occur. Stereo is the sin that gave birth to the abomination of multi-channel audio in a conspiracy to sell more...
  15. Blumlein 88

    Genelec on audio science

    Yes, this was very satisfying doing recordings with just a couple well chosen and placed microphones. You open the end of the room up to sound like somewhere else. And to my dismay, most, nearly all non-audiophiles do not like that kind of sound quality. They hear the hall, the sense of...
Top Bottom