Beyerdynamic has taken a clever and unusual approach with its new in-ear monitors: the DT 70 IE, DT 71 IE, DT 72 IE, and DT 73 IE. They’re small enough that from across the room, you’d never know a DT 70 is a DT 70, which makes it rather easy to end up with a left 70 and a right 72 if you’ve got more than one pair lying around. Technology, Drivers, and TuningThe Beyerdynamic DT 70-73 IE IEMs use German-made 11mm Tesla dynamic drivers, the same tech found in the T1 and T5 headphones. DT 73 IE (Classical Instruments & Keys)I enjoyed the DT 73 nearly as much as the DT 70. If you want a neutral, all-arounder for critical listening, the DT 70 IE is your best bet.