Yamaha: NB074960, JAY-4201, JAY4201, JA-4201, JA4201, JA4204, JAY-4207, JAY4207, JA-4207, JA4207, JAY-4208, JAY4208, JA-4208, JA4208, S-4115, S4115, S-4115H, S4115H, and many more. YAMAHA Models 8 Ω.
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