RAAL-requisite - CA-1a / Circum-Aural Ribbon Headphone - The Source AV
RAAL SR1a Ribbon Headphone with Amplifier/DAC Options
Reference Audio Systems - RAAL-Requisite World's first Earfield™ Monitor – True-Ribbon™ headphone The SR1a by RAAL-requisite is the world's first Earfield™ Monitor. Experience mixing, mastering, and home listening with unparalleled accuracy and
RAAL SR1a Ribbon Headphone with Amplifier/DAC Options