The Sony UX‑Pro 90 is the crown jewel of the brand’s Type II chrome lineup, offering 90 minutes of recording time (45 per side) on a high‑bias “Super Chrome Plus” formulation that delivers exceptional output, sparkling highs and robust low‑end detail. Housed in a five‑screw, heat‑resistant shell, the cassette features Sony’s signature ceramic‑composite guide block for rock‑solid tape alignment, minimizing dropouts, flutter and modulation noise even during high‑speed dubbing or rugged car‑deck playback. Its smoky‑black casing, gold‑and‑silver lettering and distinctive red “Guide Block” marker evoke pure mid‑’80s hi‑fi pedigree. Originally marketed as the cassette capable of capturing CD‑quality fidelity, the UX‑Pro 90 remains a sought‑after blank for audiophiles, lo‑fi producers and mixtape curators who demand studio‑grade clarity wrapped in a shell built to last decades of rewinds.