You really can't upgrade a power supply that's already built into a processor (NAD / Marantz). However, you can do a linear power supply upgrade for transports and sources. These are things like Oppo/Panasonic bluray players, streamer boxes such as AmazonFireTV or Android TV streamer boxes such as SkyStream Pro 8K, etc.
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Yes, a linear power supply would definitely improve a roon nucleas as well. This question was actually asked recently and I posted a detailed answer: https://forum.audiogon.com/discussions/lps-for-roon-nucleus |