Thanks for the response. I did see the current offerings from Paradigm. The Cinema, while priced the same, and higher power, has slightly less LFE than the old PDR. If I were to take a guess, it sounds like the driver in my PDR has finally given up the ghost. It's almost 18 years old, so not surprising. Probably just being a little overly sentimental about it. I know I could buy a replacement driver on ebay for less than $50, or a PDR 10 for less than a buck fifty,, but I also know it's old, and sometimes you need to let old things go. I'm also realizing that 18 years ago a $350 sub is more like a $450 sub today. I think the best course of action is probably save a few more pennies to stay in the same class as the PDR. In the meantime, I'll dig out my Monitor 7s, and run without a sub.