Highfigh, if you want to run it under your oscilloscope and do a waveform analysis, post some measurements, all good. Amazon has a 30 day return. If you don't want to test it it\/try just try to find a link from someone (anyone) who has actually tried the product. Start with Amazon, 16 reviews OK:\nhttps:\/\/www.amazon.com\/Audiolab-Filter-Direct-Current-Blocker\/dp\/B097WMR2T1\/ref=asc_df_B097WMR2T1?tag=bngsmtphsnus-20&linkCode=df0&hvadid=80195749379707&hvnetw=s&hvqmt=e&hvbmt=be&hvdev=c&hvlocint=&hvlocphy=&hvtargid=pla-4583795276428961&psc=1\n\nFrom an actual owner:\n\n5.0 out of 5 stars 2 Days from now, you will be mainlining the purest audiophile grade sound imaginable!\nReviewed in the United States on January 25, 2022\nVerified Purchase\nI did not perceive there to be any problems with the electricity in my system, I purchased the DC Blocker in the hopes of better sound. As I was plugging it in, I was having skeptical thoughts, figuring that it would likely go back.\nI hit the power button on the amp and was absolutely ShOcKeD! The improvement in sound quality jumped straight out at me. It was like putting a new battery in your Accord and all of sudden you have a 700hp V-12 Ferrari! All aspects of the audio are improved. The biggest difference is in the mids. Vocals are more holographic and real. Hugh increase in separation, clarity, layering, etc. Insert the whole audiophile lexicon because you name it, it was doing it. I skimmed my way through around 500 songs and counting.\n\nI have tested this DC Blocker with 2 different amps, one 240 volt and one running 120v and both were vastly improved (audiolab 6000a and Rotel A11 Tribute). I like both amps, but the 6000a is definitely superior in terms of straight up sound quality -mainly in bass articulation. This DC blocker will do the most good on amps. I've tried it on partnering equipment and performance seemed a bit enhanced but I don't know if I could tell in a blind A\/B test. Results will be most dramatic on amps. I would guess that it will produce the best results on mid and high level equipment because crappy power is the only thing left holding them back. It's output plug is IEC (most amps use this input) so you can't use it with any old plug without an adapter. It is limited in it's output to 300 watts although the fuse is for 4 amps so it would likely handle a bit more. Powering a receiver would likely work out great as long as you don't crank it on 8 channels. This will not feed a whole 12 outlet power strip but there is an small IEC power strip available here on Amazon and you could likely power an amp, dac and a disc player at the same time.\nIt is a little disheartening to realize how badly our gear is being served by the terrible quality of our electrical grid. Your gear is way better than you think it is! Even if you don't think you have a problem with your power, you must try this audiolab DC Blocker. This little device was a bigger upgrade than buying new speakers and cost a pittance in audiophile terms.\nTo the naysayers and snake oil proclaimers, there is much to be skeptical about in audio, but I challenge you to send this little guy back.\nI own two of these. Some day, one of them will go to my heirs. The other will be placed under my head and buried with me for holographic sound in the afterlife. Let's face it, hell likely has dc on the mains.\n\n\n"under an oscilloscope"? I have worked with audio for more than 50 years and never heard or read anyone use that phrase. "Put it on a scope", "check it with a 'scope", "scope it", etc but never "under a scope".\n\nWhy should I waste my time and tie up my money, testing something I don't care about?\n\nYou seem to think that the grid is killing equipment all over, but it's not.\n\nWould you be interested in opening yours and showing what's inside?