Check out this post from stereophile.com by John Atkinson for today’s daily audiophile roundup about Scaena Spiritus 3.4 speakers which have tubular subwoofer modules that reinforce its midrange units and ribbon tweeters. This is an improvement over earlier models. It is pictured with amplifiers described elsewhere on the page, a Kronos turntable fitted with an SME V-12 tone arm, and AMR preamp and a Scarlatti digital front end.
Nice Work Audio Dr:
Audio Doctor presents Scaena speakers
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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?