Yamaha, One Pair of 8 Ohm Original Replacement Diaphragms || Part Numbers: JA4201,7,8.   NB074960

JAY-4201, JAY4201, JA-4201, JAY-4207, JAY4207, JA-4207, JA4207, JAY-4208, JAY4208, JA-4208, JA4208, S-4115, S4115, S-4115H, S4115H, and others...