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  1. W

    What electronic audio products you want tested most

    We do need a mic review website... since mic FR consistency is even worse than speakers, and have to deal with distance and polar response...
  2. W

    Why an AC Power Cord cannot make a difference

    I have a pack of them that I try when I encounter any noise or spike issue. So far they have done nothing. They don't even do anything to the USB3.0 2.4GHz interference because they have pretty much no impedance at said frequency. Wonder if that's why they stopped showing up.
  3. W

    How high up the frequency range do you apply room correction?

    For peaks and dips I do whatever is needed, usually up to 200Hz ~ 300Hz. Treble peaks and dips I ignore even when the combing effect from table bounce shows up in measurements. For boundary effect and target curves I do whatever my preference wants.
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    Why an AC Power Cord cannot make a difference

    If only one conductor goes thru the ferrite, then it becomes differential-mode. And we do that for DC power supply filtering. For the clamp-on types that we put on signal cables or whatever cables, those are common-mode since it goes onto both conductors. They do nothing to differential...
  5. W

    The circuit performance can change so much depending on whether you use a Professional or Amateur

    Summary: An SMPS with the same schematic is built twice using typical vs layman construction method. Measurements of results including efficiency, temperature and noise/regulation performance Audio in Japanese but English closed caption available
  6. W

    Here's An Interesting Challenge For Amir

    Someone always needs to spot check the OS. Like android 48khz shenanigans.
  7. W

    KEF Reference 3 - damaged cone

    So... ferrets do nothing to sound quality. Another snake oil myth busted.
  8. W

    Does anyone else like FM?

    My country's DAB radio died, FM is still alive.
  9. W

    Why an AC Power Cord cannot make a difference

    Yes, it causes a difference Is that difference good/bad? Does the $500 cable vs a $2 cable have that difference? Most of the time we don't even get past the second question, let alone the first.
  10. W

    Why an AC Power Cord cannot make a difference

    How do we even fix what we don't know? What undesirable behavior of the mains cable are we talking about? A highly resistive cable would form a nice RC filter, isn't that what snaker-oilers want?
  11. W

    Why an AC Power Cord cannot make a difference

    Class I and II refers to the appliance, with the chassis (and the clearance/insulation) and stuff. The power supply alone is not classified by this class. You will find that this information will clear out many pages worth of confusion in this thread
  12. W

    Why an AC Power Cord cannot make a difference

    USA already has 240V with 2 x 120V but you guys use it for the washing machine. Must be one audiophilic washer.
  13. W

    Why an AC Power Cord cannot make a difference

    BTW for those looking for an easy way to swap mains polarity, just use a USA to UK adapter like this or whatever. Notice that w.r.t. to ground pin positioning, the mains and neutral are swapped between USA and UK (and I'm sure other combinations of countries). And these universal adapters don't...
  14. W

    Why an AC Power Cord cannot make a difference

    No it isn't, and some RCA come with a spacer/washer to prevent that. In any case, secondary ground should not be directly connected to mains earth and that's a fact that is enforced in safety code. Notice this statement implies that chassis in class-I appliance should not be treated as...
  15. W

    Why an AC Power Cord cannot make a difference

    What if the people who properly engineered the IEC power receptacles with integrated EMI filtering come and tell you power cords don't matter?
  16. W

    Bluetooth speaker fault

    Nothing in the product page says it can do stereo with 2 speakers
  17. W

    Is Digital Audio Transmission Analog? [video]

    https://hifiduino.wordpress.com/2011/02/05/bulk-transfer-mode-in-musiland-monitor-devices/ I actually have this thing, never felt more reliable than normal, still gives pops when I'm doing capturing in OBS so I gave up and went back to good ol' PCH.
  18. W

    Shure SE535 Limited IEM Review

    Those were the days when people bought headphones based on the sound. There was no right or wrong.
  19. W

    HiFiMan HE-R10P Stealth Headphone Review

    Maybe the distortion actually does something. I mean it's 10% so it's resonating or something and that gives the sound some reverb or something... Does waterfall plot work for headphones?
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