I built a THT-LP for my home theater last year after hearing all the rave reviews of the output of this design. Yes, it delivers some thunderous bass, but I find it to be to soft for my liking. I want to feel the bass yes, but I also want it to be tight, clean sounding, and reach deeper. I used a P.E. 15" RSS390HF-4 and was wondering what others have built with this speaker. I am powering it with a QSC RMX-850. I have looked at many options from buying a flat pack from DIY Sound Group to build my own box, ported and sealed. I sure would like to hear what people have done with this speaker and the results.