I wanted to raise the Preludes up a little (just to line up the tweeter with my ears, which likely isn't necessary but hey, I couldn't help it and didn't want to move my ears) and I found some butcher blocks at a Home Goods store that were cheap and exactly the footprint of the Preludes. Painted them flat black and stuck small rubber feet on them so they don't move (a stack of 2 per side), and they look like they belong there. The Vibrapods are under the Prelude bases on top of the blocks in an Oriental rug based environment, although the Preludes are on the floor just missing the rug. I informally tested the Preludes low frequency limits with a test CD and although they are surprisingly full range, they don't have much going on below 50hz...the REL just sweetens everything and charges the room somehow to make it sound simply better, and it really makes the Prelude system sing (the REL is unobtrusive...you barely see it behind the left speaker). I had been using a Forte' 55 amp but changed to the Jolida out of curiosity and because they're so inexpensive it's hard to lose (plus they accept the nice XLR cables I had).