Design and features:This Bluetooth wireless home/studio-style on-ear model provides very good sound. Although this model is a closed design, it doesn't form a tight seal with the ears so you'll be able to hear that door bell ring, train announcement, or car horn when you are wearing the headphones. The HD 250BT has a volume control plus an integrated microphone and player function controls. Additional features include Free Sennheiser Smart Control app for Apple and Android mobile devices adds additional features. Has volume, music player transport, and call connect/disconnect on the right earcup. Has power on/off, Bluetooth pairing, battery level voice announcements. Has Bluetooth pairing memory for up to 8 devices. The Sennheiser Smart Control app download for Apple and Android mobile devices shows the headphone battery level and can be used to adjust the equalizer and update the headphone's firmware. Bluetooth connected Apple mobile devices using iOS Version 5 and above will show the battery level. This model comes with Quick start guide, USB-A to USB-C charging cable.
Sound quality: We found the HD 250BT 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. With the Sennheiser Smart Control app set at Neutral Acoustical setting (as received state of the headphone) the bass (as in bass drums, bass guitars, stand-up bass, etc.) has good impact and goes deep, but is somewhat prominent and boomy. The midrange (voices, guitars, horns, etc.) is fairly even but slightly hazy and congested, somewhat grainy and a touch etched. The treble (cymbals, the upper range of violins, etc.) is extended, but somewhat prominent and sizzly. The sound also has a good sense of liveliness and is somewhat open--sound-wise it almost seems like you don't have anything plugging up your ears and it does a decent job of recovering room ambience. Mixed character - warmish bass with neutral midrange and coolish The treble. The overall sound can be summarized as somewhat bassy, a bit raspy, and somewhat sizzly. The Sennheiser Smart Control app acoustical settings had a noticeable effect on the sound.
Comfort: We found that these headphones produce a sense of light to moderate pressure on the ears. As typical of on-ear models the ear pads might feel hot and/or sticky after prolonged use. Users with larger heads might find that the headband does not have enough adjustment range resulting in the headband pressing uncomfortably on the top of the head and/or the earcups not sitting properly on the ears. Some users may find that when they lean far forward the headphones feel unstable and shift forward. When wearing this model while walking the muffled vibrations from each foot step can be heard slightly through the headphones.
