Hello, looking for recommendations on a replacement sub. Currently running a JL 10W1V3 single 4. Box is .55 and depth is 5-1/4 power is from a Fosgate P600X4 bridged at 300 watts. Looking for something a little louder-more output. Keep everything else the same box and amp wise. Was thinking of the Sundown SD but not sure it would be any better than the JL. Let me know what you think. Thanks!!