Conclusion: The sound quality offered by the MDR-AS20J earphones is nothing to write home about — it's roughly what you get from a slightly above-average pair of stock 'buds. On the one hand, bass response is admirable for such an inexpensive set. It's not thumping, but it is nicely noticeable.
Pros: Ear loops are not adjustable and some users will not be able to achieve a secure fit, Package doesn't include a case or any extras, Some music sounds muffled
Cons: Uniquely designed, Offer an understated style, Detachable clip keeps the cable out of the way during activity