Brainwavz · Aftermarket replacement
MDR-7506 Replacement Premium Earpads (PU)
Verified as compatible with 2 headphone models.
Verified compatible headphones
Evidence
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brainwavzaudio.com
Brainwavz names the CD900ST as a compatible headphone model for its PU replacement pads and lists the stated dimensions: 20 mm thick, 100 mm high, 75 mm wide, inner hole 60 × 32 mm.
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brainwavzaudio.com
Brainwavz’s own product page explicitly says the pads are for Sony MDR-7506, V6, and CD900ST models. It lists 20 mm thickness, 100 × 75 mm height and width, and a 60 × 32 mm inner hole.