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The Monolith™ M650 has been engineered from the ground up to provide the kind of quality that is the hallmark of the Monolith series of audio products. Featuring a newly engineered 50mm beryllium dynamic driver in an open back design, the M650 excels at spacious imaging, smooth midrange, and detailed highs. The M650 features a larger earcup than the M600, offering more bass and a larger soundstage than its smaller cousin. Comfort was not an afterthought, as the lightweight headphones feature a padded headband and come with both velour and leather ear pads for sustained comfort during long listening sessions.