For some time now I have been considering picking up a used Sub-harmonic processor. Well have reached the deciesion that Im going to make this a reality. Can anyone shed some light on what brands and models I might like to look into. I've never used one, and from the few post here and differant reads around the net, conclusion leads me to belive they can do wonders (when properly set up and incorperated) into your LEF channel.This especially with older and less than perfect recorded bass material. And of course for the Bass head a must I would assume. Any input on where to look and what to look for would be greatly apreciated. Im looking to by used for the saveings and if not for me as one mght say, just will unload on Ebay or Audiogon hopefully at not much of a $ loss.