Back in the 80s or 90s you would have needed 2 car batteries in row to get a bass heavy sound like the kids are blasting today on their little blutooth speakers. What gave the technological boost, better batteries or better speaker tech?
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Batteries played a huge role. 35 years ago, I was into R/C cars. The most common battery was a 7.2 volt 1200 mAh pack with 6 sub-C cells. Now they use a comparably sized 5200 mAh LiPo battery; over four times as much power. You can now have something the size of a paperback book that can jumpstart a car.
If you want a 60 watt speaker that lasts more than a few minutes, modern batteries can provide that at a far more reasonable size than the batteries of the past.
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