Bruce Heran has introduce a new audio device familiar and known to the general public as tube headphones. These tube headphone amp share the well crafted design by Oddwatt which is responsible for the amplifier which delivers a sound that goes far beyond the average tube headphone amp. The 6DJ8 tube headphone amp article is a good read.
Read the full article here:
DIY Audio Projects – Hi-Fi Blog for DIY Audiophiles: 6DJ8 Tube Headphone Amp
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I’m seeking info for sanctuary reverberation absorbsion material ( panels) and best placement.
There may be apps that do that. You can definitely find spectrum analyzers that will measure ultra low.
Is there an APP that can measure the ultra low frequency levels?