The B&W Model 801 Loudspeaker of 1980 – Preservation Sound
Amazon.com: PRYMEBLU SPM-801F Highway Spm-800 Series - Medium Duty Motorcycle Helmet Microphone: Motorcycle Helmet with Dual High Output Speakers. Available for Full Face Helmets, Black : Automotive
B&W Matrix 801 Series 2 loudspeaker | Stereophile.com