I have a question about building a sub. I would like to start one in a month or so. I currently have one SVS and a Samson s1000 amp. I want to add another sub but my wife is freaking out about it. She does not want to look at another sub in the room for some reason. I figure I could build a sub in a box with a tempest driver in it. This type of sub would be low to the ground and would not be as noticeable in the room. I would use the Samson to power it. Are there some really good designs that I could copy out there somewhere and how would they compare to the SVS 20-39+ that I should have any day now. I would want something with a really good output to compliment the SVS. How would this compare to a sonotube? Thanks for your suggestions!!!