I bought this to filter electrical noise but it actually INCREASES the overall noise. I verified this with the TriField EMI Noise Monitor. The noise straight from the outlet was about 76 mVpk and from Furman was about 84 mVpk. Based on the reviews it seems to help some people with audiophones etc so I'm wondering if it only focuses on 60kHz harmonics while this TriField meter measures something in the 10kHz to 10MHz range. This is a high performance surge protector. with 15ft cable. In that sense, it's convenient for me since there aren't many outlets in my house and most standard surge protectors have shorter cords. But it's not very good at filtering out general electrical noise. However, it can filter certain frequencies. I've now connected the Furman to a Greenwave electrical noise filter and the overall noise level dropped to less than 20mVp-p.
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