OK Im looking to upgrade my sub set up. I currently have 3 JL w6 dvc the old ones about 4 years old they still sound great. But time to update. I’m running them w/ PG tantrum 1200.1 birthsheet is 1500 w @ 4 ohms. They are in a sealed box behind the 2nd row seating in my 2000 Tahoe loaded at an...