clear, loud

none really

I had 2 twelve inch xtr3s and I really liked them. I hit 135.5 db with my amp bridged wrong. I could have hit at least 140 db. Great subs for the money.

Spine crushing bass

none

I run two dual voice coil Orion10XTR's in a sealed Orion box
Originally I had them in a professional band-pass box; they hit incredibly hard but were not loud enough so I invested in an Orion dual 10 sealed box. I've competed against guys with twelve’s and blown them away. These include:
Phenix gold, MTX, JL, Crankenstein
With a lifetime warranty fears of driving them too hard are impossible.