Shure SE215 vs Sennheiser IE 100 Pro

Both are wired single-driver in-ears built for monitoring, and they trade blows. The Shure SE215 isolates far more noise (up to 37 dB) and has a proven, replaceable MMCX cable with a secure over-ear fit, which is why owners keep them for years. The Sennheiser IE 100 Pro has a cleaner, more neutral 10 mm driver and a lighter feel, but its 4.1 rating and fewer isolation claims make it the pick for studio reference rather than noisy commutes. Buy the Shure for blocking sound on stage, on a plane or in a loud office; buy the Sennheiser for flat, honest monitoring in a quiet room.

• Choose the Shure SE215 if you need maximum passive noise isolation, a secure over-ear cable and a replaceable MMCX connection for long-term use.
• Choose the Sennheiser IE 100 Pro if you want a more neutral, studio-reference sound in a lighter shell and don't need heavy isolation.