I have had excellent results with Richard Gray products - they won't limit dynamics and will protect against surges and spikes - a used 400 MkII should sell for under $600. I found however, that I needed several to isolate components and really get the best performance from them. For the money, you may do better with one of the other conditioners mentioned.
4 or 6 outlet conditoner for amps/sources
I am looking for a conditoner that does a conditioning job without limiting dynamics. I am looking to plug a tube CD player, a tube preamp, and a pair of monoblocks into it. Can any of you make some suggestions on a recommened product or your experiences with different products/literature? Should I be looking at one box for conditioning or separates for source and separate for amps. Ideally, price should be under 600 USD on used market and offer surge/spike protection as well. THanks for all your input. Dave