Denon AH-C400

Denon’s new $249 AH-C300 may be the biggest, bassiest in-ear monitor in headphone history. Each of the IEM’s seemingly bulky earpieces has one of Denon’s patented Double Air Compression Drivers. It’s an arrangement with dual 11mm drivers, both firing at each other into a chamber that vents directly to your ear. A miniature control wheel gives the same functionality as on the over-ear and on-ear models.