I have about 10 Lutron Casetas and have zero humming from any of my LEDs which are basically 100% of my house, and neither of my 2 amps, including 1 MA252, which has zero power conditioning and a stock cord right now, dead silent. They're not cheap, about 60 dollars a piece. Maybe these will help?
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Living Room
Audio research LS28SE preamplifier, Aurender N10 Streamer, Topping D90 DAC, McIntosh MC462 amplifier. Focal Sopra 3 speakers. Salamander Archetype rack, Symposium Acoustics Segue shelves, Silver Eclipse 7 XLRs, Shunyata Everest power conditioner, Alpha V2, Delta V2 and Venom V2 10/12 power cords, and Audioquest Oak speaker cables. GIK Acoustic's bass soffits and 244 bass trap Art panels room treatments. Sony XBR75X900e 4K TV and Sony UBP-X800 Blu-ray player
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