I saw this at parts express: Part Number 290-434 Sells for around $350 each. (Already has a heatsink in the front of the cone, I think). It's an 18 incher with 97 db eff that can do 1250 watts rms. Xmax: 9.8 mm. Wonder what would happen with 2 of these and a suitably modified 12 pi cabinet. Should get 135 db SPL continuous you think? -akhilesh