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2001 ski nautique sport

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  • 2001 ski nautique sport



    Has anyone ever ran a couple of amps on there boat? I would like to install a sub and amp. Also a six channel amp to run some 6.5 inch speakers.my only concern is that I think I should add another battery. Which is fine by me, but not positive the stock alternator will be able to charge these batteries.


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  • #2
    Most owners have several amps on their boat running a mix of in-boat speakers, tower speakers and subwoofers. Running multiple batteries oftentimes depends on how much use the amps will get with the engine is off. Most install a separate battery for the sound system so as not to drain their starting battery.

    Having said that - I only run a single battery with my two JL Audio amps. I run an XD400/4v to power my 4 in-boat JL MX650's and an XD700/5v2 that powers a pair of Wet Sound REV8's on the tower and a JL subwoofer under the helm. The JL amps are class D amps and are very efficient. I regularly run them with the engine off for several hours at a time while anchored and have never had a problem starting the engine afterwards. I do carry a small jump box (JNC660) just in case. It was a less expensive solution to wiring in a separate battery and I keep it in the garage in the winter in case one of my cars needs a jump.

    Depending on how many speakers you want to run - the JL Audio XD700/5v2 is a great option. You can run 4 speakers @ 75 watts RMS (@ 4 ohms) and a subwoofer @ 300 watts RMS (@ 2 ohms).

    Assuming your stock alternator is in good condition, it will be adequate to charge two batteries if you decide to go that route.

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    • #3
      ^^^^This
      Stick with efficient class D amps and your alternator will be fine. One good battery is fine for up to 1000 watts
      Ken
      2001 DD Air GT40

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      • #4
        So do you guys have battery switches . Have you ever heard of blue sea add a battery? I was thinking about doing that. Do you guys think the stock alternator will be able to charge these two batteries. Any input is greatly appreciated!


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        • #5
          Originally posted by maszmax View Post
          Do you guys think the stock alternator will be able to charge these two batteries.
          Did you read the second post? Yes - THE STOCK ALTERNATOR WILL BE ABLE TO CHARGE TWO BATTERIES. However you seem bent on justifying your need for a new alternator so there is an upgrade available through www.nautiqueparts.com. Assuming you have a GT-40 motor see this link: https://www.nautiqueparts.com/produc...pcm-rf097009a/ $350. This kit comes with a new wiring harness which you will need. It is important to remember to use a marine rated alternator. Marine units are ignition protected to shield sparks from possibly igniting gas fumes. Don't go out and get a unit from Autozone or similar auto parts stores or from a auto wrecking yard.

          You will need a switch and a battery isolator to properly add a second battery. The Blue Seas product is one of many that will do the job.
          Last edited by a0128; 6 days ago.

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          • #6
            Thank you for the help


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            • #7
              A0128 what kind and what size battery are you running


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              • #8
                Interstate Group 24 Marine (24M-XHD). Been running it for three years now. Typically I disconnect the battery cables during lay-up and reconnect and charge the battery in the Spring. Been very reliable.

                Maybe you know this, but I'll review anyway. You will want a battery classified as a starting battery for your engine. You can use a deep cycle battery for the stereo if you elect to go the second battery route. Never use a deep cycle battery as your starting battery. Think of it this way: Deep Cycle = Small loads over long times. Starting Battery = BIG load for a short time. You'll want a Marine battery as they have a extra set of threaded terminals typically used to secure the boat's positive and negative cables. Automotive batteries don't have these extra terminals.

                Combine these two types of batteries with the Blue Seas product and you should be good to go for many years.
                Last edited by a0128; 6 days ago.

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                • #9
                  Thanks everyone for all of your help I really appreciate it!


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