Check out the reviews on the Audience Adept Response power conditioners. They come in 1, 6 or 12-socket models, all with the same electronics. This is passive conditioning, but all the reviews rave about the dynamics, so I decided to try it. I have the 1-socket model, powering my Musical Fidelity Nu-Vista M3 integrated amp (250 watts per channel into 8 ohms) via an Audience Power Chord and the music is very lively, dynamic and lifelike.
They are expensive new, but can be found used. They come with a 10-year warranty, which I understand is transferrable to new owners.
By the way, although the Power Plant Premier regenerates the sine wave, it then runs it through a passive conditioner at the final stage before output. That passive conditioner is also sold separately as the PS Audio Quintet. I have also read that the PPP, when faced with peak power demands that exceed its capacity, it sends unconditioned power through to meet the demand. This means that it will sound much better on a system that does not over-tax it.
They are expensive new, but can be found used. They come with a 10-year warranty, which I understand is transferrable to new owners.
By the way, although the Power Plant Premier regenerates the sine wave, it then runs it through a passive conditioner at the final stage before output. That passive conditioner is also sold separately as the PS Audio Quintet. I have also read that the PPP, when faced with peak power demands that exceed its capacity, it sends unconditioned power through to meet the demand. This means that it will sound much better on a system that does not over-tax it.