• The Gohawk system got good reviews – GoHawk TN4-R Amplifier 4″ Full Range Waterproof Bluetooth Motorcycle Stereo Speakers 1 to 1.5 in. Handlebar Mount Audio Amp System (TN4-R Black) https://a.co/d/6YeHqt8 ,(TJ4-R is chrome version)
• BOSS Audio MC470B gets good reviews and has four speakers. Make sure you supply an on-off switch for the 12v power.
• LEXIN LX-Q3 Motorcycle Speakers Bluetooth Waterproof with Stereo/Bass Sound, Motorcycle Radio with Atmosphere Light, Loud Black Handlebar Motorcycle Audio Systems, Built-in FM Radio/Bluetooth Music https://a.co/d/d3iZi5N
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• Bose mini soundlink – $119 each on Amazon – “I put on my bars, good sound to 60mph, battery lasts all day”
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• Boss mcbk420b from Amazon 2-speaker system (below) $60 USD
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•….https://www.rockvilleaudio.com/rocknride-gl500/#
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• BAD REVIEWS on JBL Cruise PWSSPKCRUISEAM Handlebar Mounted Bluetooth Audio System
• You can add speakers to your helmet:
• You can get a helmet already wired for sound and communication, such as Sena
Rebel500 