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  1. yuriv

    Reply to review by 'yuriv' on item 'Sony MH755'

    Hi @brianforever. I just saw this. I haven't posted in nearly two years, basically putting the hobby on pause since the pandemic began. The world has changed. When I wrote that report back in 2018, I saw no reason to conclude that the MH750 and MH755 had different drivers. They looked the same...
    • yuriv
    • Head Gear rating reply
  2. yuriv

    Reply to review by 'yuriv' on item 'Apple USB-C to 3.5 mm Headphone Jack Adapter'

    Yes, you can see the adapter in the photo above. It works on both Macs and Windows PCs. I haven't tried it on a Chromebook yet. I also tried an OTG micro USB adapter on my Android devices, and that worked too, but the maximum volume was around -20 dB lower than what's possible on other OSs. It's...
    • yuriv
    • Head Gear rating reply
  3. yuriv

    Relatively cheap headphone measuring kit?

    I should check out these forums more often. My last post before this one was way back in November, well before the lockdowns. The world has changed, and I've put aside all of these fun audio projects for now. I've been happily listening to music or making music with the cheap or mainstream gear...
  4. yuriv

    Etymotic ER2SE - A Reference Headphone for your Ears and Your Couplers

    First of all, thanks for sharing the files for the Harman 2018 and 2019 IE targets. I’m not exactly sure which experiment you’re referring to. My post is only about the new target curves and the SoundCheck software. Their measurement routine uses two couplers so they can measure both channels...
  5. yuriv

    Etymotic ER2SE - A Reference Headphone for your Ears and Your Couplers

    This information might be of interest to some of us: https://www.listeninc.com/prediction-of-listener-preference-of-in-ear-headphones-harman-model/ Source: https://www.listeninc.com/wp/media/seq_note_Harman_Predictive_Model_In_Ear_Headphones.pdf Yes, it does say Harman IE Target 2019 v2 in...
  6. yuriv

    Etymotic ER2SE - A Reference Headphone for your Ears and Your Couplers

    Zero arguments, because you took off the devil's advocate hat too soon. Lol. I suppose it's better than trolling, or if you prefer, playing the role of provocateur. I'm just about ready to send the package to Europe after finally giving up on figuring out how to measure impedance vs. frequency...
  7. yuriv

    Etymotic ER2SE - A Reference Headphone for your Ears and Your Couplers

    It doesn’t seem much of a chore if it’s the background task. Push the IEM a little farther in, then take another measurement while you’re being productive with something else. Little and often gets the job done too. Believe me, I’m just as lazy as anyone here. Showing the effect of the...
  8. yuriv

    Etymotic ER2SE - A Reference Headphone for your Ears and Your Couplers

    Here’s what I have so far. I measured with my portable rig with the Apple USB-C dongle instead of a “proper” interface like the Focusrite Forte I have parked at my desk. The results were close enough when I set the mic’s level in Windows to 60 or higher. It’s a bit strange; with the level any...
  9. yuriv

    Reply to review by 'yuriv' on item 'Samsung AKG OEM In Ear Headphones'

    @SilverEars Oluv offered to send me one of these a while ago. Then you put it in the ER2SE tour. I figure it's cheap enough to get my own samples for modding. I wonder where you're hearing the canal resonance. For me it's at 6.3 kHz and no higher, which is not ideal. Best is 8 kHz because the...
    • yuriv
    • Head Gear rating reply
  10. yuriv

    Reply to review by 'yuriv' on item 'Samsung AKG OEM In Ear Headphones'

    @SweetEars I just tried it with different kinds of wide-bore tips. I posted my findings inside a spoiler at the bottom of the review. I didn't notice a significant difference from stock tips. This IEM is sensitive to insertion depth. If you're getting much different sound, could it be that your...
    • yuriv
    • Head Gear rating reply
  11. yuriv

    Sony budget earphone discussion thread (MH750, MH755, MH1C, EX300, etc)

    I don’t see much online about the Sony MH410c earbud, so I suppose this is as good a place as any for this post. Tyll Hertsens wrote back in 2011 that “pretty much all earbuds suck.” As a group, they consistently have the most anemic bass and the worst distortion. Measurements of earbuds back...
  12. yuriv

    Review by 'yuriv' on item 'Samsung AKG OEM In Ear Headphones'

    This isn't really a formal review. It's just a fitting place to post my experience with the product so that I can link to it in forum discussions without having to retype the same comments over again. I suppose it kinda sorta works as a review. It used to be $99? The EO-IG955 is the earphone...
    • yuriv
    • Head Gear rating
  13. yuriv

    Sound Science Approach to Modding Headphones

    I think my other coupler is the same model as your TBC1-4. It even follows the slight roll-off in the bass. The response is really not that different from the one I usually use, which is on a plinth. Blue: difference in response (+70 dB) The biggest difference does seem to be near 1 kHz...
  14. yuriv

    Sound Science Approach to Modding Headphones

    Judging from those measurements, it looks like your samples aren't close to target at all. It's a different result from what everyone else is getting, but you have to report your data accurately. It also looks like you’re inserting the tip really deep into the coupler. Sead Smailagic, the...
  15. yuriv

    Sony budget earphone discussion thread (MH750, MH755, MH1C, EX300, etc)

    I finally managed to continue what I said I would do at the bottom of that post you’re talking about. I wrote a follow-up here: link (scroll down a little) I just started playing with the idea again, but so far the results sound promising (to me at least): I’m really more interested in the...
  16. yuriv

    Sound Science Approach to Modding Headphones

    In this update: Fixing a channel imbalance on a Beyerdynamic DT250 Tuning the bass on the Sony MH755 Quick and dirty fix for Beyerdynamic DT250 channel imbalance Having a way to measure headphones is very useful when making mods. Even an inexpensive measurement system can show the effectiveness...
  17. yuriv

    Sound Science Approach to Modding Headphones

    My experience with clearance-bin Philips IEMs: most of the time the channel matching is good, sometimes really good like the SHE8105 in post #47. I’ve seen a few duds though. The last one was another SHE8105, but I had to return it to one of Amazon’s sellers: Philips SHE8105 with defective...
  18. yuriv

    Etymotic ER2SE - A Reference Headphone for your Ears and Your Couplers

    If we’re already measuring the frequency response at 94 dB SPL at 500 Hz with a sweep in REW, then we’re also already making basic distortion measurements at that level. Look at the difference: The the distortion at 3 kHz for this model is well known. (See the measurements at InnerFidelity...
  19. yuriv

    Etymotic ER2SE - A Reference Headphone for your Ears and Your Couplers

    Nice job measuring those! Some comments: The rig doesn’t look like it’s calibrated. It’s not clear how loud those IEMs are really playing. There was a comment earlier about the frequency response measurements being different depending on playback level on one model. If I’m not mistaken, one of...
  20. yuriv

    Etymotic ER2SE - A Reference Headphone for your Ears and Your Couplers

    That sequence works for me. The international shipping cost won't be a problem. Other notes: If I understand it correctly, the ER2SE came with some measurements from Etymotic and they have an SPL for a 200 mV, 1 kHz sine with the ER2SE at the reference plane. Or is that your calibration? If I...
  21. yuriv

    Relatively cheap headphone measuring kit?

    I haven’t measured that many custom IEMs. The standard advice is to use putty like Blu Tack to ensure the seal. It worked just fine in my IEC coupler. The other issue is the insertion depth, which is practically unchanging on the person wearing the custom mold. If the IEM is tailor-made for you...
  22. yuriv

    Etymotic ER2SE - A Reference Headphone for your Ears and Your Couplers

    Hi all, I just discovered this excellent thread after being out for a few months. I’d like to participate in the tour. If the stops are already set in stone, no big deal. I’ll just wait for the next tour. Otherwise, I’d like to be one of the last two in the U.S. because I might be getting more...
  23. yuriv

    Relatively cheap headphone measuring kit?

    The Dirt Cheap In-Ear Microphone Please excuse the thread resurrection. It took me more than two years to follow up on the ideas in post #17. Lol. Among other things, it was about constructing your own in-ear microphones for making headphone measurements. The idea is not at all new, and...
  24. yuriv

    What is the sound quality of iPhone, iPad, iPod (Touch)?

    Some more thoughts on those old iPods, now that you've ruled out the clipping issue: It looks like you're testing with a 32-ohm dummy load on each channel, at 150mVrms. From what I can remember, the performance of the 3.5mm output gets a lot worse with a low-impedance load like that. The...
  25. yuriv

    What is the sound quality of iPhone, iPad, iPod (Touch)?

    There might be a simple explanation for that. The 5G and 5.5G iPod Video's volume control lets you drive the 3.5mm output so that a 0 dBFS sine goes into clipping. At maximum volume, the signal is hotter than the line out in the 30-pin connector. That one doesn't depend on the system volume and...
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