B&C Sub18 with 18TBX100?

Hi,

I want to build a PA subwoofer for my system. The power amp will probably be a Thomann E1500, with a Sub18 bass reflex cabinet with 185 liters. To really get the punch, I'd install the TBX100 in the 4-ohm version so the power amp can deliver its 1200W.

What kind of volume can I expect from the subwoofer? Or would a larger amplifier be more beneficial? It's intended for gigs with my band and parties, where decent bass is required.

Regards, Jan