Here are two compatible diaphragm replacements. ① The construction uses a voice coil with a "wise winding" (likely referring to a specific winding pattern). It seems to have a good density, but compared to the original, the high frequencies are somewhat reduced. Diaphragm material: Titanium 8 ohms Compatible with: DH1, DH1A, DH1012, DH1202, DH2012 Pure aluminum flat wire