Summary: While the Etymotic ER-4PT MicroPro earphones offer excellent audio quality, we found the custom molds difficult to insert. Still, if you don't want to spend more than $300, we prefer the sound from the ER-4 more than the Sonomax eers PCS-250. We recommend skipping the custom molds, though. With the plethora of tips that come with the earphones, you'll most likely find a set that fits just fine without having to spend an extra $100 for the molds.
Summary: While the Etymotic ER-4PTs have less low-end oomph than some competing earphones in this price class, they deliver excellent sound with very accurate tonal balance.
Pros: The Etymotic MicroPro ER-4PTs are accurate, well-balanced in-ear headphones. Their treble clarity and precision let you hear details in the recording, and they exhibit a richer and more satisfying balance in bass and midrange than the Etymotic HF5s. The ER-4PTs are solidly built, and a protective case and airplane adapters are included.
Cons: The thick plastic around the ER-4PTs' plug may restrict access to some smartphones or audio devices housed in cases. If you like a lot of bass, the ER-4PTs will come up a little short. Complete sonic isolation and some cord-related vibrations can also interfere with on-the-go listening.
Etymotic Research ER•4PT MicroPro Earphones w/CUSTOM•FIT Eartips Review
20 May 2011
Excerpt: Several years ago, I reviewed Etymotic Research hf5 High-Fidelity earphones . Although being a writer at The Gadgeteer enables me to try/review many earphones per year, I continue to enjoy and regularly use the hf5’s to this day. Their size and performance are ideal for me. So, I was excited when Etymotic Research agreed to not only send me a pair of their latest ER•4PT MicroPro Earphones to review but have a set of their CUSTOM•FIT Eartips created for me as well.
Pros: - Excellent sound experience, - Great size and form-factor, - Quality construction and materials, - Little cable noise, - CUSTOM•FIT Eartips are perfectly fitted and extremely comfortable, - 2 year warranty
Excerpt: Grundsätzlich sollte man den Hörer in einem relativ bewegungsarmen Umfeld betreiben, denn nur dann bekommt man einen Klang, der kaum zu übertreffen ist. Wie es Etymotic schon ankündigt, werden auch Audiopuristen beim ER-4PT voll auf ihre Kosten kommen. Für den moblien Einsatz eignet sich der Kopfhörer hingegen nicht. Wir vergeben 4.5 von 5 Sternen.