Design and features:The Monolith M650 has medium sensitivity so it can provide satisfying volume levels when used with home audio equipment and all but the lowest-powered portable audio devices. This model has earcups fold and swivel to flat for ease of carrying and storage, and comes with a detachable 77-inch long standard audio cable, two pairs of earpads of different types, and a carrying case.
Sound quality: We found the Monolith M650 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 somewhat bassy and soft. Bass (as in bass drums, bass guitars, stand-up bass, etc.) has good impact and goes fairly deep, but is somewhat prominent and slightly boomy. The midrange (voices, guitars, horns, etc.) is fairly even, but is somewhat hazy, soft, congested (think sonic traffic jam), and dark (there is an opaqueness that covers up fine detail). The treble (cymbals, the upper range of violins, etc.) is extended but somewhat 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 covering your ears).
Comfort: We found that these headphones produce a sense of moderate pressure around the ears. As typical of over-ear models the ear pads might feel hot and/or sticky after prolonged use. Users with smaller heads may find that the headphones feel big overall and that they can't get a good earpad seal (earpads gap at the top), which causes the bass to becomes a bit subdued. Some users, especially those with smaller heads, might find that the headphones feel unstable and shift forward a bit when they lean far forward even to the point of falling off. When wearing this model while walking the vibrations from each foot step can be heard.
