Design and features:These earphones can be used wirelessly with Bluetooth devices or can be cord connected. In cord connected mode they have high sensitivity so they can provide satisfying volume levels when used with lower-powered portable audio devices. The h.ear MDR-EX750BT uses a collar/earphone design - all of the electronics and controls are incorporated into an open collar that sits around the neck, and the earphones are attached to wires that extend from the collar. It has an integrated microphone and built-in volume, music player function, and call connect/disconnect controls for use with paired Bluetooth devices. Additional features include optional NFC Bluetooth pairing and the ability to receive high resolution audio Bluetooth transmissions from selected Sony products. This model comes with four pairs of ear pieces in various sizes, a detachable 41-inch standard audio cable for wired use, a USB charging cable, and a carrying bag.
Sound quality: We found the h.ear MDR-EX750BT delivers sound quality that falls in the very good range - it reproduces music and voice very well although it does have some noticeable sonic quirks. The overall sound can best be summarized as bassy and slightly soft. Bass (as in bass drums, bass guitars, stand-up bass, etc.) has good impact and goes deep, but is prominent and boomy. The midrange (voices, guitars, horns, etc.) is fairly even but a bit soft, hazy, grainy, and slightly overwhelmed by the bass. The treble (cymbals, the upper range of violins, etc.) is extended, but slightly subdued. While the sound has a decent sense of liveliness it is somewhat closed-in -- sound-wise it is somewhat obvious that you have something plugging up your ears. There was no significant difference in sound between the Bluetooth and the wire connected mode.
Comfort: We found that these earphones fit and stay in place with no problems, and the collar is not generally noticeable and is very convenient unless it interferes with clothing. As typical of in-ear models these earphones do produce a sense of pressure in the ear opening might be uncomfortable for some. When earphones are not in the ears they dangle from the collar and rest on the chest where they will swing out away from the body when leaning over; this can be bothersome, lead to the earphones getting tangled, or expose them to damage.
