I bought this new Velodyne DLS - 4000R. Great sub! But it brings up an interesting problem. With my old JBL I just fired up the Sound & Vision Disc to calibrate it, then left it alone. With the new sub there are four presets, and sub up and down volume. Now when I switch between sources (eg. a movie or a CD) I have to retweak the sub volume. Thankfully I transfered the remote onto my Harmony remote, but it is an extra tweak. An now I have to rely on my ear, or I would be pulling out my meter every time I changed a source.