A worthy and aggressive upgrade.
I have EPH-100 for 3 years and also Fischer DBA-02 MKII (1 year)
On H-300 you will find the best of both EPH-100(BASS) and DBA (High mids, awesome Treble) combined
making honor to the 3 way 'Hybrid' IEM.
Both have a wide Bass spectrum response but being more feel-able on H-300 on freq <80Hz ..
but EPH plays little 'Happier' around 160Hz..
Mids presentation its about on par with both Phones, Percussion hit cleaner and louder on H-300 but you have the distraction of Bass and Treble where on the Yamaha, the 3 are more balanced in volume. Treble is superior on T-PEOS. Transparency and detail are there to take and give away. Guitar lovers can even say not just the brand but also the color of that instrument. Cymbals on H-300 are aggressive, can drive you crazy unless you decrease volume.
Yamaha EPH 100 handles it very clear and softer though but the rest sounds little foggy in comparison but still crisp.
Both phones pick up background sound well but audibly cleaner on H-300.
My player is a Nexus 5 which is not famous on sound quality, but Neutron app does justice on that matter.
On my Yamaha RX-V474 receiver the story is even more interesting but haven't listened for more than 10 minutes with T-PEOS.
H-300 sounds more powerful at the same volume ( I have to decrease volume by 7 db to match EPH 100's)
Also, where EPH-100 starts to distort, is where H-300 sounds even better. I guess the 6-mm little guy showed its limits this time
EPH 100 is however more comfortable and isolates better even using the same tips. Though Cant detach cable a don't have mic, now at $117 they're worth every ¢ for their comfort, build quality/durability and sound. Every owner should be happy with them. But is not where sound ends.
T-Peos H-300 did not fit/isolate well on me even with it's big tips collection, the foam were too big for me and silicone ones too Dry?. I put the EPH 100 M tip on it and worked. But ordered some bi-flange from MEElectronics as they are shorter and usually stick well in my ears.
Edited by XGUGU - 5/10/14 at 6:32pm