I owe a FUSION ppam 1200.2 1200W Stereo/Mono Convertible.
Bought it in 2009 for 23k I guess or so
Anyhow, it can easily bang two D4's
Fortunately its not for sale
but do search in anyone else willing to sell, its really good.
And now come towards Subwoofers, I had my experience with Pioneer 307D4 in the year 09-11 but now im actually a kind of out of these ground shaking weapons
Herd a lot about JBL p1222, will cost you around 15-20k each.
BOL with the purchase.