Excerpt: I’ve heard most of the world’s best in-ear headphones, and frankly, those custom-molded models fitted to my ear canal from the likes of JH Audio, Ultimate Ears, and Westone regularly trump the universal-fit models.
Conclusion: The Sennheiser IE 800 is the most expensive non-custom-molded in-canal earphone pair we've reviewed, and it earns its price with excellent audio performance.
Pros: Superb audio performance through the frequency range, with rich lows and clear, vibrant mids and highs. Thoughtfully designed ear tips are easy to swap out, clean. Protective filters keep outside elements away from drivers.
Cons: Extremely expensive. Cable is not fully detachable—hardwired to ear pieces.
Conclusion: It's difficult not to admit the IE 800s are contenders for "best in-ear headphones I've yet heard", but it's equally tough not to admit they're so acutely engineered that they're priced too high, even for many of the world's most passionate music lovers.
Pros: Genuinely top-of-class sound quality, great design and comfort
Cons: Engineering to this degree ramps up the cost significantly against the competition