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Powering 50w amplifier board with batteries for float-able speakers.

Discussion in 'Power Electronics' started by tekapeel, Apr 10, 2014.

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  1. tekapeel


    Apr 10, 2014

    I'm making a sort of waterproof boombox, if you will, with a 50w amplifier board, two 25w marine speakers and an indestructible dry box. I'm having a hard time wrapping my head around how I'm going to power it, though. The board takes an input of 14-19 volts DC at around 6A, what would you guys suggest as the best way of keeping it ticking along? I'm somewhat of a noob so I'm having a really humiliatingly hard time getting my head around how anyone powers things with batteries that don't have incredibly specific power requirements. From what I understand, around 15 Amp/Hrs will be sufficient to keep it going for a decent length of time before it dies.

    Thanks very much in advance!
    Last edited: Apr 10, 2014
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    15AH will keep it going for about 2.5 hours, but you may not want to discharge the batteries all the way down.
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