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April 5, 2015 - 8:10am
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DANGER: when playing 96/24bit recordings of Records
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You are on the right track with what is going on. Although it's not audible, as these frequencies are well below the level of human hearing, it certainly disrupts the speaker's ability to properly handle the frequencies within their range of reproduction. Inserting a subsonic filter should take care of it. We used to call it "woofer pumping" because that's what it looks like.
Sealed-box speakers are immune from this problem, but with a reflex (ported) loudspeaker, the woofer cone is unloaded below the port-tuning frequency and responds to infrasonic signals with large excursions.
High-pass filtering will solve the problem, though with a small hit in absolute sound quality.
John Atkinson
Editor, Stereophile
I thank you both for validating my observation and your intelligent responses. I am thoroughly enjoyng my new hobby ... Which is becoming a passion of mine.
Could anyone recommend a specific solution to resolve this with my considerable library of FLAC files from vinyl source?
My setup can be seen in the gallery... But I'll repeat it here:
MacBook air -> 1/8" to rca generic cable->PS Audio NuWave DAC->AudioQuest King Cobra XLR -> Creek Evolution 50A -> AudioQuest Rocket 33 -> Epos Epic 2 speakers on Epic stands...
I listed my equipment to give overall system synergy as well as my budget.,..
I welcome any and all feedback, pun intended!
John: you mentioned a high pass filter ... Is that a software solution or a hardware box?
Catch22: you also seem to be familiar with this and mention a subsonic filter.. I actually do have that in my vinyl audio chain.. It's part of the Phono Stage.. But can you recommend a solution for my digital chain?
Kind Regards,
Ron