Able Planet Sound Clarity SI550A In-ear Headphone Review$79.99
Sennheiser MM80i Comparison
While both are relatively similar in design, the Sennheiser cans offer a little more versatility in their customizability than do the Able Planet Sound Clarity SI550As, but ultimately cost a lot more than the Able Planet cans. If budget is a limiting factor, your choice between the two might be made before you even give them a shot.
The Able Planet Sound Clarity SI550As have the flatter response in the low end, but if you're a big fan of bass, you might want to give the Sennheisers a shot, as they overemphasize lower frequencies to a large degree, but they don't skimp on the highs either.
Neither set of in-ears has any issue with distortion.
While it's true that neither set of headphones has perfect tracking, you're not likely to notice any audible channel preference errors unless you are a robot.
The MM80is block out a bit more sound overall than the Able Planet Sound Clarity SI550As do.
No two models of headphones are identical, and that much is true of both the MM80is and the Sound Clarity SI550As, so the only way you'll ever know which fits you better is to try them on. After all, everyone has unique auditory anatomy, and what's comfortable for one person can be unbearably painful for another.
While the MM80is offer a bassier experience than do the Able Planet Sound Clarity SI550As, they're also over double the cost. While their remote is a little more comprehensive than that of the Able Planet Sound Clarity SI550As, you can easily get away with the remote on the Able Planet cans for general smartphone use. In the end, it's up to you to weigh the pros and cons, but the Able Planet Sound Clarity SI550As give you a fair bang for the buck, though you do get a bit more for the extra money spent on the MM80is.