This and That:
Four pairs of silicone tips that are really thin and therefore look and feel like those that usually come with very cheap in-ears.
Carrying case with magnetic lid (quite comparable to that of the 1More E1001). Really nice looking and sturdy but ultimately less moisture- and dustproof than a traditional case.
Cable doesn't look special but cheap, however it is rather supple. Good strain relief. No chin-slider though.
MMCX plugs look a bit different from what I'm used to seeing. Proprietary-ish?
Uninspired shell design; generic piston. Easy to insert though.
The whole visual impression leaves me definitely unimpressed for the price.
Sound:
I'm only using low impedance sources and the largest included silicone tips.
Tonality:
Balanced/mildly v-shaped.
Mild bass and fundamental range lift (ca. 4 dB more quantity compared to the Etymotic ER4SR/ER-4S), doesn't really affect the midrange except for a mild warmth boost to low voices. Flat extension towards sub-bass with only slight roll-off below 30 Hz.
Tonally mostly natural sounding midrange that's slightly on the darker side with a bit less quantity at 2 kHz.
Laid-back central treble around 5 kHz, coming back around 7 kHz with a rather narrow peak that slightly overshoots above zero but isn't sharp (will only occasionally make the cymbal attack appear slightly metallic).
Even roll-off above 12 kHz.
Resolution:
There’s not much to say about the resolution as the Fostex’ is, typically for IEMs with BA transducers, on a high level and exceeds most dynamic IEMs in the same price range.
Speech intelligibility is high.
Treble’s resolution is on a high level as well. Good note separation.
Tight and fast bass with still a bit of body.
Compared to other single-BA in-ears, the TE-07’s resolution is somewhat higher than that of my Phonak Audéo PFE 132 but below that of my Etymotic ER-4S.
Soundstage:
Coherent.Expansion to the sides is surprisingly present on the Fostex, however without fully neglecting the depth. It's definitely more oval than round though.
Instrument placement is pretty clean and precise; the same goes for the layering and instrument separation.
Solely with quite fast music, the Fostex’ soundstage appears a little strained.
Compared to that of my ER-4S, the Fostex' soundstage is somewhat larger (mainly wider) but ultimately not as precise.
Conclusion:
Pleasant tuning and good technical performance. Appearance and accessories (quality) definitely don't match the comparatively high price though.