CAN YOU DOWNGRADE YOUR FIRMWARE!? HERE IS THE REAL ANSWER!! (JBL BOOMBOX 2) - YouTube
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Just got New firmware on my JBL Boombox 2.0.0 to 2.9.0 : r/JBL
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HELP! JBL Boombox 1 won't charge when plugged in. Flashing red light at all times then powers off. Factory reset doesn't help. I know I need to do a software update but
Jbl Boombox 3 Sound comparison between the old and the new firmware - YouTube