I have two SVS 25-31CS subs They are approximately 4 and 6 months old respectively. They both have the new improved standard drivers, 1.5" thick laminated birch end caps, and 50% thicker, improved stronger tubing with the black polymer coating .They are overkill in my small home theater/living room. I wish to sell one of them . They were both purchased B stock although you could never tell by looking . One was manufactured on 1/16/ 2001 and the othe one on 5/15/2002. I paid 340.88 delivered for the first one and 309.22 delivered for the second one they both have the remainder of the 3 year warranty left. I will sell the 2002 model sub with the longer remainding warranty for $275.00 local sale cash and carry. If you don't have an amp to power it I have a Marantz MA500 180 Watt into 4 ohms THX certified monoblock in perfect working condition I will sell with the sub for $125.00. If you think you might be adding a second SVS sub later , I also have a nice Fidek 2 channel amp that puts out 200 watts per channel into 4 ohms. I have performed the "fan fix" on this amp and you can barely hear it running now . These sold for $300.00 originally and I'll sell with a sub for $175.00. The only "catch" is I'm looking to sell local and do not wish to ship.