Mapleshade Records also sells a passive power strip conditioner which does not limit power (this I use), as well as a surge protection option which is said to not degrade more than 2% of the sound quality through their strip (never tried by me).
Also recommended is the Machina Dynamica Flying Saucer RFI/EMI reducer (no power limiting) to be plugged into the AC outlet immediately adjacent to the one into which you plug the power strip conditioner. I also use a number of these in other unused AC outlets throughout the listening room, and in other rooms since price is so modest, and benefit quite wonderful.
Also recommended is the Machina Dynamica Flying Saucer RFI/EMI reducer (no power limiting) to be plugged into the AC outlet immediately adjacent to the one into which you plug the power strip conditioner. I also use a number of these in other unused AC outlets throughout the listening room, and in other rooms since price is so modest, and benefit quite wonderful.