I try to avoid negative posts but this is just insane.
BlackBody by LessLoss Audio Devices
The Blackbody is a high-tech audio accessory which greatly enhances your audio playback experience by addressing the interaction of your audio gear's circuitry with ambient electromagnetic phenomena and modifying this interplay. The Blackbody takes advantage of the quantum nature of particle interaction, and is therefore able to permeate metal, plastic, wood, and other barriers to affect the circuitry inside your components. This altered electromagnetic influence results in profoundly improved sound quality.
The LessLoss Blackbody is not a power filtering device. Rather, it complements your power filtering device by addressing the audible imperfections incurred by your gear's direct interaction with ambient electromagnetic phenomena. Where a power filtering device leaves off, the Blackbody, as a field filtering device, takes over.
In depth tech answer here http://www.lessloss.com/page.html?id=73
ＥＣＣ８１／１２ＡＴ７ - こんばんは。 ＥＬ３４ＰＰアンプを修理しています。 電圧増幅管のＥＣＣ８１／１２ＡＴ７は交換の時期が来ていました。
5 hours ago