I'm using the Powervar ABC 700 11 for home theater stuff. And a Oneac CP 1107 for my preamp and dac. My amp I plug into the wall. Paid 45.00 including shipping for each of these. The Powervar is a 7amp output and the Oneac is 6.3 amp output. Plenty of headroom for what they're used for. An added benefit also is they will quiet the picture on your tv. I live near an industrial area and originally wanted them for power problems I've been having. The sound is better now with the power conditioners in line (like listening late at night all the time). Ebay is your best bet for these. I'm afraid I seriously doubt the audiophile conditioners are any better. These things were designed for labs and hospitals and are therefore not as cosmetically pleasing as the specialty models by Monster and the like.