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  1. Polygonhell
    Post

    Massdrop x Eddie Current ZDT Jr. (Official Thread)

    I fixed one myself, again it’s not hard, though some the screws were a pain to get to. What headphone are you using with it, it’s probably never...
    Post by: Polygonhell, Dec 24, 2023 in forum: Headphone Amplifiers and Combo (DAC/Amp) Units
  2. Polygonhell
    Post

    EC Studio

    11-12 o’clock is fine, remember it’s not a linear pot, so 1/2 volume is closer to 10% power than it is to 50%. But I would tend to agree, the...
    Post by: Polygonhell, Oct 13, 2023 in forum: Headphone Amplifiers and Combo (DAC/Amp) Units
  3. Polygonhell
    Post

    EC Studio

    FWIW I actually have both an Egoista 845 and Studio T here. FWIW outside the cost of tubes, there wasn’t a huge price difference used between...
    Post by: Polygonhell, Oct 13, 2023 in forum: Headphone Amplifiers and Combo (DAC/Amp) Units
  4. Polygonhell
    Post

    Donald North Audio — Owners Thread

    FWIW I broke mine trying to get it out, but it really is just squeeze the tabs at the top and bottom, and pull it out. Donald sent me a mouser...
    Post by: Polygonhell, Sep 22, 2023 in forum: Headphone Amplifiers and Combo (DAC/Amp) Units
  5. Polygonhell
    Post

    The All Purpose Advice Thread - Part 2

    Rectifiers there are 2 of them are discrete diodes to the left of the caps below the transformers.
    Post by: Polygonhell, Sep 21, 2023 in forum: Advice Threads
  6. Polygonhell
    Post

    Distortion Surface: old measurement, new approach

    Would be interesting to test a SE tube amp, I suspect it would be the the exact opposite of the IFI, with distortion increasing with volume rather...
    Post by: Polygonhell, Sep 8, 2023 in forum: Audio Science
  7. Polygonhell
    Post

    EC Studio Junior (not AF)

    It just means it has the expected 2nd Harmonic rich midrange that most people with limited tube amp experience tend to associate with tube amps....
    Post by: Polygonhell, Sep 8, 2023 in forum: Headphone Amplifiers and Combo (DAC/Amp) Units
  8. Polygonhell
    Post

    EC Studio Junior (not AF)

    You’re pretty limited in how far you can push an amp that’s designed to be linear sounding in that direction. It’s largely a function of the load...
    Post by: Polygonhell, Aug 31, 2023 in forum: Headphone Amplifiers and Combo (DAC/Amp) Units
  9. Polygonhell
    Post

    EC Studio Junior (not AF)

    Missed this when I responded yesterday, but this is probably normal. In most tube amps power is not regulated the voltage into B+ is controlled by...
    Post by: Polygonhell, Aug 28, 2023 in forum: Headphone Amplifiers and Combo (DAC/Amp) Units
  10. Polygonhell
    Post

    EC Studio Junior (not AF)

    283V would be about right for an a,p with 300V B+, you get some loss across the transformer primary, just from the static resistance of the coil....
    Post by: Polygonhell, Aug 27, 2023 in forum: Headphone Amplifiers and Combo (DAC/Amp) Units
  11. Polygonhell
    Post

    Real audio science - exploring beyond the obvious and bringing back true science and exploration

    Oh I agree, but it's somewhat orthogonal to my point. I understand the common vocab used to describe things, and yes I agree it's critical, I'm...
    Post by: Polygonhell, Jul 13, 2023 in forum: Audio Science
  12. Polygonhell
    Post

    Real audio science - exploring beyond the obvious and bringing back true science and exploration

    I think it's always interesting to go back to the language we use to try and describe the differences to see of there is anything there that might...
    Post by: Polygonhell, Jul 13, 2023 in forum: Audio Science
  13. Polygonhell
    Post

    Zahl HM1 Reference Headphones Mixing Amplifier Speculation

    Yes this, Synergy becomes MORE important as equipment improves not less. It's unfortunate that you really do have to make a decision in the...
    Post by: Polygonhell, Dec 15, 2022 in forum: Power Amps
  14. Polygonhell
    Post

    Zahl HM1 Reference Headphones Mixing Amplifier Speculation

    I'm not personally a head-fi fan, but while you certainly don't NEED a $7000 amplifier to make a headphone sound good, isn't the comparison more...
    Post by: Polygonhell, Dec 15, 2022 in forum: Power Amps
  15. Polygonhell
    Post

    Donald North Audio Stellaris - The Experience

    It’s not that it can’t get the Susvara loud, or even that it sounds bad, it’s just not a great pairing with it. I have a Susvara, and a V3...
    Post by: Polygonhell, Sep 24, 2022 in forum: Headphone Amplifiers and Combo (DAC/Amp) Units
  16. Polygonhell
    Post

    "Shortest Way" SW51 Amp Impressions (Simple SET Amp)

    Yes I see my error, there is a Russian Pentode 6Z4Pi where the Z is Cyrillic. In addition to the 6Z4 (Chinese designation) which is an EZ90...
    Post by: Polygonhell, Feb 4, 2022 in forum: Headphone Amplifiers and Combo (DAC/Amp) Units
  17. Polygonhell
    Post

    "Shortest Way" SW51 Amp Impressions (Simple SET Amp)

    Is this a typo, isn't a 6Z4 a rectifier, or is there a pentode with that designation I'm missing? Looks interesting though, do you have any idea...
    Post by: Polygonhell, Feb 4, 2022 in forum: Headphone Amplifiers and Combo (DAC/Amp) Units
  18. Polygonhell
    Post

    Donald North Audio — Owners Thread

    If you want cheaper NOS RCA 5U4G rectifiers are a significant step up over stock and about $70. I’ll second the KR 5U4G RK special edition...
    Post by: Polygonhell, Jan 2, 2022 in forum: Headphone Amplifiers and Combo (DAC/Amp) Units
  19. Polygonhell
    Post

    Lampizator Horizon DAC Announced

    I'm not trying to defend the claim, it's marketing. Sure there has to be a Digital component, to latch the bits to something, it's a D to A...
    Post by: Polygonhell, Dec 8, 2021 in forum: Digital: DACs, USB converters, decrapifiers
  20. Polygonhell
    Post

    Lampizator Horizon DAC Announced

    You could certainly argue that in a traditional R/2R ladder the switches aren't in the audio path, something has to latch the input signal. The...
    Post by: Polygonhell, Dec 8, 2021 in forum: Digital: DACs, USB converters, decrapifiers
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