I do, but both together would be too much power for them right? I suppose I could Multimeter the AC voltage output and convert it to watts output and put each amp around 2000 watts or so..... Although..... I could probably sell one of the 2500s i have and a get a new SAZ-3500 for it.... or even a SAZ-4500...... That also sounds great! lol Use one? Using the sundown would gain you what 3db? if that? Not to mention any power after they reach xmax is just heat. You don't need to give a sub 239482349 watts for it to perform well. No, 99% of the power put into the woofer is heat, why are you talking about xmax? Any more power that's given to the sub after it's already reached it's limit is just extra heat, no? Any more power after xmax and parts start failing, tinsels snap, spiders rip, depending on xmech, coils smash. None of those are caused by heat. Yeah, that's mechanical limit I confused that with thermal. My bad