I just tried out a dbx 386 tube preamp at a store the other day and I must say that I was rather impressed. It was really warm and round with a lot of output to drive a power amp. I see that there is a single channel version with a compressor and eq. Has anyone tried either of these? It really sounded like my bass only louder. They are $500 new which is kind of expensive but then again, I have been thinking about getting an avalon 737 after the new year so, what is $500?