Home-made corner bass traps. Cost all of $40 for materials for two of them plus about 20mins to put them together. They do an excellent job cleaning up the bass frequencies. This "product" has given me by far the best improvement per dollar spent I have ever had.
In terms of buying something that someone else made, I would say that my Denon DL103R cart is pretty much the cat's pajamas.
In terms of buying something that someone else made, I would say that my Denon DL103R cart is pretty much the cat's pajamas.