Box Design Needed For Three JL Audio 10W6V3 In My Polaris Ranger Please

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Id love some suggestions if you are interested. I have (3) JL 10W6V3 subs for the bed of my Polaris Ranger. I have tried running (2) in a sealed enclosure with two fosgate prime 500 amps and was not blown away. So lets try three. Seems a ported enclosure may be the ticket? We have 53 wide by 11 high and whatever we need depth wise. I would hope it would be 15" or less though deep. Amp wise.... I will either grab another 500 prime or a Kicker KXA series 1600. If for some reason I need to do 4 subs we can do that too. Let me know your thoughts.