I fancy the idea of a little DIY project constructing a sub. Although I am handy at construction I have no idea where to start with regard to the design. If there is anyone on here who can share some expertise I'd appreciate it! I don't really even need a sub although I think it could be fun making one and learning a thing or two along the way. The sub will be used in a spare room (only a 14x10') rather than the lounge initially. Application is for two channel music, with the odd film via a plasma. The only priority is sound quality. It must be as accurate as possible, so as not to drag down my hifi into blurred sub bass. Would be good to limit max size to 8 cubic foot. (Kit is benchmark dac1 into pmc aml1 active near field monitors). Considerations: 1. Should I use a large driver that only has to move a tiny amount (say a Precision Devices 24") or a smaller driver (JBL pro?) that would need to move a lot more to shift the same amount of air. Discussion most welcome! Remember accuracy, not spl is important. 2. Transmission line designs are the most accurate I've ever experienced so far. I'm open to other solutions though - sealed, ported, infinite baffle (although not really practicle in this room, but still interesting). Any thoughts? 3. Power could be the usual suspects of Bryston or Crown mono's. I'd like to hear some other ideas though. Perhaps digital or DIY options? 4. Cross over could be a Behringer, or...? I was thinking leave the floor standers running a full signal (which they do very well) with the sub only joining in from 15-40hz ish? Methods appreciated! 5. Location - would be good to have it placed bang in the centre of the room, as a single sub solution. Acting as a coffee table too. I understand 2 or 4 subs in the corners (or moved out a little) is another ideal solution. However I'd like to just make one sub. I was looking for free downloadable sub enclosure design software. So far I have these links below. Any reccommendations? A link to designing would be a good start for me too! Thanks in anticipation... [URL]http://www.ajdesigner.com/speaker/index.php[/URL] [URL]http://www.caraudiohelp.com/subwoofe...e_software.htm[/URL] [URL]http://www.diysubwoofers.org/sld/sealed1.htm[/URL]