Hi guys, so I'm looking at what kind of power I would be able to run through my Sundown Audio SA 15 when it gets here. Setup is below, lmk if I forgot to mention anything. It would also be helpful if anyone else with this amp could let me know about where on the dial this wattage would be, obviously I can make a guess but I don't have an oscilloscope to be sure. Thanks!

99 Accord stock alt and wiring
HU: Pioneer DEH-X6500BT
4 Gauge power wire and ground
Amp: Rockford Fosgate Prime 1200.1d
Box: Ground Shaker GSP 1 15 with cotton inside (from sonic)