The Audio-Technica SonicFuel line of earphones are designed for active, daily use -- combining comfort, style, and immersive listening.
The SonicFuel line (aka ATH-CKX) includes three models, 5, 7, and 9, available as earphones or in the communications version with in-line microphone and playback control / volume slider (iS suffix).
The line features ergonomic C-tip earpieces with a crescent flange that nestles gently in your ear folds to stay in place for active use.
The result is a nice fit that holds the earpiece in well without needing to have an over-ear attachment. The good fit also provides great sound isolation to better hear the full sound. The flat cable (in the 7 and 9 models) also avoids the cable noise you can hear in other designs.
The 5 and 7 models feature "360-degree" rotating ear tips that pivot to adjust to the angles of your ear canal.
The 5 model offer compact driver performance for under $50 -- $44.99, or $49.95 w/ mic, in black, white, red, blue, and green.
The 7 model adds an enhanced driver system, flat tangle-free cable, and carrying case for $74.99, or $79.95 w/ mic, in black, white, blue, red, and purple.
The 9 model adds large 13.5 mm drivers for deeper bass and stronger highs, for $94.99, or $99.95 w/ mic, in black or silver.
These include a generous selection of C-tips (S, M, L) and ear tips (XS, S, M, L). Plus the 7 and 9 models add Comply foam tips that form to the shape of your ear canal.
See my Holiday Gadgets & Portable Accessories 2013 coverage for more on portable audio and other fun devices.