I know they are both older models, and not the very best but for a beginer with a very small budget... In my local Craigslist there are 2 home theater subwoofers listed. One is a Cerwin Vega LW12 and the other is a Cerwin Vega HT-12PWR. I know they don't compare to any of the new subs out there but my budget is very small. These are listed for around $100. I have a Yamaha YST-SW315 and every time I get any decent bass tracks on a movie like Jurassic Park, the sub always bottoms out, so I have to lower the volume on the sub which takes away from the impact. Any thoughts on either of these subs would be greatly appreciated.