Interesting... I just got 2 noise destroyer from the Cable company. I already have a noise harvester installed. When I inserted them into my system, I was trying to listen for more darkness because apparently that is what noise free power supply should do right? But the reverse is true. The sound became way more detailed and added a lot of air but not sure whether it has also turned my system a bit sharp. Or am I a bit overwhelmed by the level of detail. Thing is the noise harvester is still blinking even with 2 of the destroyers installed. BTW I have a PPP installed too. So not sure why the dramatic difference.