Thanks for the reply. I absolutely stand by what I said (can't really use enough superlatives to describe the difference between the WF-1000XM4 and AirPods Pro
in terms of sub-bass, specifically <100Hz bass.) What Sony calls "Clear Bass" in their app.
I put together a playlist of songs containing at least some beats in that frequency range, and then I did a spectral analysis of the songs to confirm my suspicions. lol ... Sure enough, the beats I was focusing on were all around 50Hz, which is a frequency that a lot of headphones simply can't reproduce well (in spite of the tech specs pretty much universally saying 20Hz-20,000Hz) ... there's just too much rolloff below 100Hz, or the bass that low isn't tight, or whatever. Those beats are present on the AirPods Pro, which is more than can be said for a lot of cheap headphones, but those same beats have an almost visceral quality on the WF-1000XM4. The Sonys are indeed
vastly superior.
If you have a chance to test the Sonys again, I recommend tweaking the EQ using their Headphones Connect app; foam eartips tend to cause some roll-off with the higher frequencies, so at the very least you'll probably want to boost 16k and a little less of a boost on 6.3k ... I also increase "Clear Bass" to level 5, because I like that LF bass to really kick. Once that's all done, fire up some bass-heavy songs. But specifically, songs that have a nice presence in that 20-100Hz range. I've made a playlist on Apple Music which you're welcome to check out:
For an example of a specific song, you can take
"This Could be Anywhere in the World" by Alexisonfire. I like this one because this is a genre you normally wouldn't associate with LF bass - I mean, it's post-hardcore/screamo. But as you can see in this frequency analysis, there is very pronounced LF beat occasionally throughout the song, at about 33Hz. On the AirPods Pro you can hear it, but with the Sonys, it kicks you upside the head. It
sounds the way that kind of beat should
feel, IRL. Does that make sense?
View attachment 1802558
Also, I'd use something other than Spotify to do your testing, if possible. In my experience, Spotify rolled off the 20-60Hz range quite noticeably, compared to Apple Music. It's been almost two years since I tested it last, so maybe it was just a bug which they've fixed in the meantime, but yeah - when I tested it, I was not impressed.