Pros:
- Outstanding 'life-like' realistic dynamic. Excellent speed and power, close to life music performance.
- Relatively easy to drive, doesn't require powerful amp to produce 'life-like' dynamic, although good quality player is certainly better.
- EQ friendly, responses really well to EQ tuning.
- CKR9 Maybe an IEM with the best bass quality. Bass level is accurate, bass quality simply among the best, realistic and life-like. CKR10 follows with similar quality, with a few dB (slightly) more bass than CKR9 for those who prefer slightly fatter bass.
Cons:
- Sound signature significantly different before and after burn-in, that makes the sonic character difficult to be observed from a new unit. All required relatively long period of burn-in to sound best. A full of 7 days burn-in is recommended.
- The stock silicon tips are not optimum for both CKR9 & CKR10. Larger bore tip is preferred for both.
- Cable jacket is rubbery, not smooth like the ATH-IM series cable.
- Straight-down wearing style, cannot be worn over the ear. Moderate microphonics (cable noise when rubbing or touching other object) is expected. For an IEM at this size, straight-down wearing style is not very comfortable for walking, jogging, or other physical exercise. CKR9 and CKR10 with their relatively big size are more suitable for music listening while sitting and relaxing.