I know nothing about how to create sound; just know what sounds good. Going through some hardware changes to upgrade. Soundspace: living room, adjoining dining and kitchen: approximately 5,000 cubic feet, little carpet. Listening Style: 3 types: movies with surround, actual quality I couldn't care or less about, heavy rock at high-enough volume that most people whine about, and classical music at a full-sounding but medium volume. My focus is on clarity. I hate muddled noise. I insist on using my EQ and bypassing digital intrusion on my control of the output. My 12-band EQ gets a workout, because I'll adjust it according to the music type or song I'm listening to. I need to build a sub or two that will provide great sensitivity and clarity when I listen to classical music, and punch with clarity when I listen to rock. CLARITY is the keyword. I can build anything, and plan on building either a single large cab for both subs, or separate cabs. I need the complete list of materials: Drivers, crossovers, amplifier, cabinet specs, the best wood to use, etc. I had thought to build in such a way I could plug the ports when desired. I love having all options that give me control. Ahead of time, I appreciate all the advice. I've already learned much from this excellent forum. Thanks.