I watched the Amp Dyno for what I am assuming is the Power Acoustik RZR1-2500D?
It seems to do fine on a restive load (the amp dyno) but that is different than being hooked up to the speaker on music. I also looked up the sub... JL says 1.75 cubic feet ported. If they recommend that size enclosure then do that, they made the sub, they know what it is designed for. I would take the Pioneer all day over the Power Acoustik. ALL DAY. You have a good start, you have a good sub... now fill in the rest. Box, Amp, Amp Power and Ground wires... Set gains correctly. Enjoy some bass.