iKKO
OH10 Obsidian
headphones
$199
Used market: $155*
Specifications
3 of 6 values have a recorded sourceExpert Audio Engineering Commentary
Tonal Profile
A titanium-coated polymer dynamic with a Knowles 33518 armature above it, in a brass shell that makes the thing noticeably heavy for its size. iKKO names the armature model, which is rarer than it should be.
Gain Staging Advice
106 dB/mW at 18 Ω is about 123 dB/V. The hybrid crossover means source output impedance shifts tone here, not just level — the usual caveat for anything with an armature in it.
* Estimated with the depreciation fallback (~78% retained value). · checked on 8/5/2026