Able Planet Sound Clarity SI550A In-ear Headphone Review$79.99
While the frequency response does trail off in the high end, the Able Planet Sound Clarity SI550A maintains a relatively even frequency response with few if any erratic shifts that will be audible to the user. Despite its somewhat less than ideal highs, the bass emphasis is notable, which will provide your inner ear with slightly increased ability to hear high frequencies, but not much. Not bad, Able Planet.
While there is a very minimal amount of distortion, overall it's not something you're likely to hear, as i never strays into the range where it would be audible.
Despite a few minor blemishes, the tracking response of the Able Planet Sound Clarity SI550As is even. You will not notice any channel preference shifts that are audible.