I currently use two Chang Lightspeed CLS 709 power line filters with great results, in my main system and home theater.
Work much better than a PurePower 1500 AC regenerator.
My audio is dead quiet, warm and 3D. The video is sharper with much brighter colors.
The 709 has two outputs for mono blocks, and several outputs for digital and analog low power. Also includes surge protection fo lightning strikes, giving me peace of mind.
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