Review on 🔊 Nobsound Magic Eye Tube Preamp 6E2 EM87: Audio Level Indicator, VU Meter, Music Spectrum. Vacuum Tube + Driver Board + Case by Chakravarthi Ladner

Brightness too high for use in a dark listening room/cinema. I had to spray the tubes with automotive taillight tint spray to keep it bearable. The amplitude adjustment for lamp sensitivity is practically useless, you can twist and twist and twist and no change. Suddenly you turn in the wrong direction. Once these small tweaks are made, they're pretty nifty and a good conversation starter for those who see them in action.