Question about MA Audio HK4000D Car Audio Amplifier

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Trying to power a amp with 16 volts. possible?

I am trying to install a amp and sub in a 48 volt golf cart. which has 6/ 8 volt batteries. will my amp run if i put two batteries in a series and create 16 volts?

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  • johnjmunger Jan 23, 2009

    do you know if they make a smaller amp 400-600 watts that will handle 16 volts . we are working with a very limited space and cannot fit another battery.thanks for the help

  • johnjmunger Jan 24, 2009


    wow that is awesome info. this will definately work then we are looking at using a sony sub to start just in case of destruction we wont be out alot of money. but rockford fossgate has always been my sub of choice. i still have a set of 10" in my truck that have out lasted 4 trucks. so i am a fan of their products

  • krishna May 06, 2013

    can all amps work at 16 volt or it wil blow

  • krishna May 06, 2013

    i made a power supply and it delivers 16 volts and 25 many watts amplifier can i connec5t to this powersupply


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Pick any two batteries that have one wire connecting them together, connect your ground to the neg on one battery and your positive on positive post on the other battery, that should give you 16 volts. Also fuse your wiring on both sides just in case.

Posted on Nov 08, 2009

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Golf carts do not have a charging system. If you are going to use battery power only, why not just add (1) 12V car battery instead of (2) 8V??

MA Audio runs (ran) their bench tests @ 17V. All the power ratings advertized are at 17V.

The power supply for the hk4000D is unregulated. So the more voltage = more power.. 8V-16VDC.

  • RMS Power @ 14.4V
    • 1800W x 1 @ 4 Ohm
    • 3600W x 1 @ 2 Ohm
  • RMS Power @ 17.0V
    • 2000W @ 4 Ohm
    • 4000W @ 2 Ohm
    More input voltage means the amplifier will have to work less hard to make power.
    Don't expect the amplifier to work for very long however. the current drain on a class D amplifier is huge. There are no on-board fuses protecting the power supplies, so be sure to have at lease a 150A power line fuse.
    With 150A current draw - even with the amplifier at 1/2 gain - expect to get 10.6 minutes of listening time from your 16 volts before recharging - also note, the amplifier MUST see 8V to turn on, there is a built-in voltage sensor that will shut down the amplifier if voltage is too low.
  • Posted on Jan 23, 2009

    • blueextc3221
      blueextc3221 Jan 24, 2009

      Ma audio makes many small amplifiers. In the HK series, the HK1998 is 12"x2"x12" (just a tad smaller)

      But the HK is their HARD Kore line - meant for pure power!

      Are you stuck on MA Audio? or are there other brands you would put in?

      What is the subwoofer you are using?

      You need an amplifier that has an UNRegulated power supply. So the 18V it can handle. US Amps older USA series with anodized aluminum chassis are popular in golfcarts. Something else you may want to consider is a MARINE amplifier to keep it safe from the rain if it is going to be outside. Thay are made with stainless steel fittings/terminals, and are sealed to resist water!

      Let me know!!

      Here is a pic of an older USAmps USA-200 (smallest). I remember they are available in blue, red, green, tiedye, and purple.


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