XBA-4 arrived yesterday in the morning. They´re pretty big! But very lightweight and comfortable (for me). They are considerably bigger than XBA-3 and a little bit bigger than Shure Se846. What I liked a lot about XBA-3´s is the isolation and XBA-4 are very good for that. As I expected from my experience with XBA-3, the 4´s are picky with sources. From crappy desktop PC sound card output they sound with somewhat reduced bass and offensive, shrill highs. In some test tracks I was forced to unplug them. Similar to XBA-3, the 4´s benefit a lot form cheap amps like Fiio E11 that tame the highs and add more sub-bass and the sound now has a lot of weight to it which is a welcome change. They pair very well with Dragonfly 1.2 and Black (more clarity, control and soundstage is wider). From Sony Walkman F806 they sound very very good (better than I remember XBA-3 sounded, no hiss). They are noticeably "harder" to drive than Shure SE846. Xba-4 has 8 ohms impedance and 108 dB sensitivity; SE846 has 9 ohms and 114 dB which may suggest that difference is not that big...but in general it is about 20-25% volume; Shures are MUCH louder and tend to hiss with Walkmans, smartphones etc., whereas XBA-4 has black background.
For trance music they are very good and (for that genre) I actually like them much more than Shure SE425. XBA-4 has noticeably better treble extension, wider soundstage (Shure´s are maligned for their treble roll off which results in very narrow soundstage), and much better overall bass presentation. However, compared to SE425, XBA-4 sounds very artificial, mids are not bad but unnatural and not as forward and detailed.
Compared to the famous Dunu Titan 1, I personally would take XBA-4 every time. Bass extension is much better on the XBA-4´s so there is more depth to the sound, more sub-bass, treble is less aggressive and somewhat more "tiny" on the Sonys and it seem that it extends more. Overall impression is that XBA-4 is more smooth and refined whereas Titan 1 is somewhat "dry" (yes, with proper seal achieved), bass-shy and more "raw" sounding and lacking refinement in treble. However, Titan 1 have much wider and very airy soundstage which is probably what I like about them the most.
Compared to SE535...the XBA-4 have more bass, it is deeper and extends better than SE535 (XBA-4 sounds more full-bodied), also treble is a little bit more extended but again, sounds tiny and unnatural. Se535 sound natural, very clear, better mids, better everything except treble extension (and bass). For strictly EDM and vocal trance they both are very good but I like SE535 just a little bit more because of clarity, forward mids and natural timbre.
Compared to SE846 (modded blue filters)..well..XBA-4 losses in everything. SE846 sound very clear, there is very deep bass and sub-bass, highs are thicker and well extended compared to SE535 and everything just sound right, nothing is missing. Soundstage is very deep but not very wide, with exceptionally accurate and well done imaging. Quickly changing to XBA-4 and - wall of veiled sound with tiny treble but pretty decent bass. First impression is that XBA-4 sound very tiny. Fun sounding but there´s always that feeling of "something is missing".
Compared to IE800...this is unfair...it´s like switching from stereo (IE800) to mono (XBA-4). Big difference. IE800´s clarity is just superb (XBA-4 sound very veiled and a lot of details is lost in mids), bass has noticeably better extension, textured but less "punchy" compared to XBA-4. Treble - now this is interesting - it´s nowhere as thick as that of SE846 but its like well made version of what was (probably) intended for XBA-4s: refined and extremely well extended (there is just more treble). As a consequence IE800´s sound very refined and open, the soundstage is surprisingly wide, much wider than that of XBA-4 and SE846, wider than full sized open-back Sennheiser HD558, 598, Philips Fidelio X1 and even HD700 (in my opinion, after comparing them directly).
Conclusion: for 100$, the Sony XBA-4 are very very good! ...And they need an amp and/or good DAP!
- now I´m curious how the XBA-4 compare to XBA-3 (I sold mine almost a year ago, and yesterday was feeling nostalgic and bought ones)..so I will compare them when XBA-3 arrives (2-3 days)-
Sorry for the long post