Disclaimer: As always, I can't possibly thank enough Flysweep, for providing me with this opportunity. I'd like to express my sincere gratitude to you, my friend. And of course, Inks takes credit for arranging the loan.
PRO: The quality of bass is quite nice. Interestingly, the inherent suck-out at 6.5 kHz, which is caused by the crossover network design error, is somehow nullified with a time-delay.
CON: Inverted polarity, short bandwidth, and the harsh peak at 10 kHz. Unlike the predecessor, the acoustic vent on the housing is nowhere to be seen.
ON SECOND THOUGHT #1: H-200 is designed for shallow insertion: The deep-null at 6.5 kHz is tamed as the insertion depth becomes shallower. Deep insertion is not recommended at all.
ON SECOND THOUGHT #2: High source impedance shouldn't be much of a problem with H-200.
ON SECOND THOUGHT #3: The IEM is definitely benefited from additional acoustic damping applied at the output. A foam plug will greatly tame the harshness in the treble, while leaving the high frequency extension intact.
ON SECOND THOUGHT #4: Other than the translucent stock sleeves, H-200 also comes with three pairs of short black sleeves and foam sleeves, which share similar resonance characteristics. These sleeves help even out the harshness in the treble very nicely. In conjunction with other problem-solving tricks presented in this article, the tonality of the IEM will be further balanced.
ON SECOND THOUGHT #5: By combining all the solutions, the peak and the deep-null can be greatly minimized.
ON SECOND THOUGHT #6: Whether modified or not, T-PEOS H-200's frequency response is far from that of the Olive-Welti compensation target, which is a rough reference for headphonic high-fidelity.