- Aerospace alloy sound cavity: it is made of advanced lightweight alloy with only 6 grams on one side, which ensures the hardness of the cavity and provides unique comfort.
- Double titanium drive 1BA + 1DD hybrid power: Knowles 33518 balance armature and 10mm polymer composite titanium film dynamic drive, low frequency plump and dynamic, high frequency transparent natural, delicate and elegant sound
- High-purity OFC silver-plated cable: 2-pin 0.78mm detachable design. 4 strands of 8-purity high-purity oxygen-free copper plated high-purity OFC silver-plated cable with high frequency extension and low frequency strength
- Specifications: sensitivity 106 decibels, frequency range 20-40kHZ, impedance 18 ohms, cable length 1.2 m,5.7mm nozzle
Check the review of OH1 from these brand sites
When the OH1 is queued for review I paired it with the M11 to let the drivers run in so it has at least 100+ hours play time with different music. The OH1 is quite sensitive to power and it is recommended to use stronger outputs for more balanced and controlled bass performance.
This design is very common for IEMs that utilized dynamic drivers. Thanks to the two vents, I did not experience any driver flex when wearing these IEMs.
Midrange performance was the only part of this headphone that changed drastically with a bit of burn-in. At first it sounded too thin with dry voices and weak textures. In 4 hours, midrange was already much better, with much more weight to it, voices gone deeper and sounded more natural.