Softears RS10 Headphones - In Ear Monitors The RS10 is a reference IEM with 10 balanced armature drivers. To my ear, they have a neutral tuning with hard-hitting (but still balanced) bass. They offer by far the most detail and resolution of any transducer I've experienced - IEM, headphone, or speaker. Here's Headfonics: The RS10 is a supremely detailed and largely neutral or reference-sounding monitor. ... Married to that impressive bass wallop is a clean and articulate midrange presentation with a slight Harman-esque upper-mids elevation. On top, a tastefully tuned treble that extends well