AKG N5005 | Reference Class 5-driver configuration in-ear headphones with customizable sound
AKG K52 CLOSED HEADPHONES-DRIVER PROFESSIONALS
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Archimago's Musings: REVIEW / MEASUREMENTS: AKG K371 (closed-back, over-ear, dynamic driver) - An affordable, modern, standard studio headphone. (And on using the miniDSP [H]EARS rig.)
AKG N5005 Reference Class 5-Driver Configuration in-Ear Headphones - Black 28292281013 | eBay