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24v battery to 12vdc for stereo possible?

Discussion in 'Power Electronics' started by spahr50cal, Aug 15, 2017.

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  1. spahr50cal

    spahr50cal

    12
    0
    May 26, 2017
    i want to use a 24v Kobalt battery 2.0ah lithium-ion for a 12vdc stereo. i found a battery holder for this now im wondering how possible this is and what ill need, i assume a step down unless i can find a 24v stereo. this will be like a dewalt work radio w/o a charger. If your wondering no Kobalt 24v line does not have a stereo and i like to use the same battery's(also the price and reliability vs dewalts 20v wins) the main battery i intend to use will be a 24v lithium-ion 2.0ah but possibly also a 1.5ah. along with a car stereo(probably pioneer preference) and a pair of 100w speakers all in a med sized box. i would settle for using a cheap brand stereo if need be thanks for any help
     
  2. kellys_eye

    kellys_eye

    4,276
    1,146
    Jun 25, 2010
    Look for a buck (step down) converter module.

    Various sizes are available - chose one to suit the current consumption of your stereo.

    Note that a 100W stereo (if a TRUE 100W) would require peak currents in excess of 20A !!! and that your 2Ahr battery will last some 5 minutes at full volume.......
     
  3. spahr50cal

    spahr50cal

    12
    0
    May 26, 2017
    thank you, the one i was planning on using was 10a max but i found another that was 12v 5a max speakers will only be 30w x 2 but if i can make it work...also just looked up some specs. the battery is 24v but at peak, normal run is 21
     
    Last edited: Aug 16, 2017
  4. Audioguru

    Audioguru

    2,843
    637
    Sep 24, 2016
    A 12V car stereo advertised for 200W puts out 14 Watts per channel into four 4 ohm speakers at reasonably low distortion. At 200 Whats it is clipping like crazy and producing tonnes of distortion.
    Then why do you need 100W speakers? Because the 100 Whats rating is also a lie, it is for a very brief pulse before it is destroyed.
     
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