Linus and the crew dive into underwater audio by testing custom hydroacoustic speakers built by Synchrosound’s Renzo, SHOKZ OpenSwim Pro bone-conduction headphones, and a budget-friendly Monster S620 waterproof Bluetooth speaker. Along the way they break down the physics of sound underwater—why high frequencies die off, how bone conduction bypasses water’s damping effect—and get real about what actually sounds good in a pool.
After poolside trials, they rank which solution rules for lap swimmers and underwater workouts, and drop bonus tech tips for anyone looking to blast tunes while doing cannonballs.
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