Professional Tuning-Hybrid 1DD and 1BA Driver
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When you read IEM reviews that when the reviewer gives his/her opinion regarding the sound that there are many factors that shape the final sound an IEM delivers to ones ear. Those factors include:
1 - Shape and size of the reviewers ear canals. (shallow or deep, wide or narrow)
2 - Shape and size of the ear tips [round or cone, single, double or triple flange] & proper fit
3 - Materials of the ear tips (silicone/foam)
4 - The shape of the IEM (and/or angle of the nozzle) can cause fitment issues for some.
5 - Source (quality of smartphone, laptop, digital audio player) is amplified/unamplified.
6 - The IEM itself (driver flex possible due to trapping air in canal causing muffled sound.
7 - The Reviewers ability to hear all frequency ranges (age plays a factor).
Gentle reminder:
1. Burn the earbuds at low volume for 24 hours, the sound will be better.
2. It is recommended to rest your ear after every two hours.