I had the same issue with Niagara 1200. Although I didn’t measure anything per se, the degradation in SQ was noticeable. Music became flat and lifeless. Returned that sucker within 2 weeks. I’m now using Gigawatt Powerprime with good results. I’ve also heard good things about the Puritan PSM 156. Good luck.
Audioquest Niagara 1200
Hi all. This is my first post on the forum. I need some advise. I just purchased an Audioquest Niagara 1200 Power Conditioner and power cable. I also purchased a EMI power line noise analyzer. I just got the Niagara 1200 plugged in. On the high current power banks of the 1200 the line conditioner did virtually nothing to reduce emi noise. On the linear noise dissipation outlets the Niagara actually created substantially more emi noise than just the standard electrical outlet. My power is relatively clean without a power conditioner about 14.0 mVpp on the low end 40.0 on the high end. I was hoping that I could get any emi noise out of my electricity. I have watched several YouTube video reviews of people using the Niagara 5000 (currently out of my budget) and they seem to work wonders. My question is there a power conditioner that is around the same price as the Niagara 1200 that is more effective? I feel like I just bought a $1,000 surge protector. Any thoughts?