I'm wondering if you could run a (Tang Band W3-1878 3" fullrange) without a low cut.

Here are the response graph and specs: http://www.parts-express.com/pdf/264-902s.pdf

I am planning to do this in a single driver ported box with QB3 alignment with an Fb=105 Hz, and an F3=128.7 Hz, just to clear anything up.