Not for analog sources or tubes:
In audio history, thumbs-down for cable lifters, green paint for CDs, clock radios (to reduce RF), 'speaker bullets', DSP bass-correction (peak flattening), bass traps and 'soundstage-expansion' devices -like Stein Music. This Stein, with multiple units, made small speakers sound 'bigger' (not better?).
Unclear about Shakti's 'hallograph'. Helped some speaker/rooms -with reflections, 'clarifying' the soundstage. Same for ASR's 'resonators', too room-dependent for this list.
A list that really worked:
1)CDRs/disc cleaners-polishers. Either one or both -these did good to improve the reflectivity of CD and help the laser do its job. No longer needed with file or RAM-buffer playback -although Essence's treatment might help w/ ripping and burning.
2)Grounding/balanced-power units. I'm throwing these together as they did the same thing -strip away the excess charge that accumulated near (or in) our systems. "Power conditioners" from the 90s to 2010 did no such thing (or helped in some ways but hurt in others).
The first grounding unit was (probably) the Bybee-Curl device starting in the mid-90s. But its effectiveness was not certain until it improved ca. 2010. Newer entries offer 'blocks' (and claim grounding). Euro-brands Entreq, Nordost, CAD and Vertex while the U.S. has Synergistics. Others, like Audioquest, Shunyata and Telos are grounding -but with full-sized units.
Balanced power is even newer -and seems to be *as effective* as grounding. Only a few reviews, though.
Ground wires form Nordost and Gutwire. These are new and VERY cost effective.
3)Bybee iQSE. Removes a large part of radiated noise inside a component -incl. RF +switching noise.
4)High Fidelity magnetic-waveguide. Speed-up the flow of electrons -Bybee claimed to do this 10-15 years ago with his 'speaker bullets'. But this co. is finally making it work.
2 more, not so big ?
-Stillpoint's wall panels seem to be effective at removing harmful room reflections.
-Footers -from Stillpoints, Black Ravioli and Magico, reduced vibrations+microphony to a high degree. Even under speakers.
In audio history, thumbs-down for cable lifters, green paint for CDs, clock radios (to reduce RF), 'speaker bullets', DSP bass-correction (peak flattening), bass traps and 'soundstage-expansion' devices -like Stein Music. This Stein, with multiple units, made small speakers sound 'bigger' (not better?).
Unclear about Shakti's 'hallograph'. Helped some speaker/rooms -with reflections, 'clarifying' the soundstage. Same for ASR's 'resonators', too room-dependent for this list.
A list that really worked:
1)CDRs/disc cleaners-polishers. Either one or both -these did good to improve the reflectivity of CD and help the laser do its job. No longer needed with file or RAM-buffer playback -although Essence's treatment might help w/ ripping and burning.
2)Grounding/balanced-power units. I'm throwing these together as they did the same thing -strip away the excess charge that accumulated near (or in) our systems. "Power conditioners" from the 90s to 2010 did no such thing (or helped in some ways but hurt in others).
The first grounding unit was (probably) the Bybee-Curl device starting in the mid-90s. But its effectiveness was not certain until it improved ca. 2010. Newer entries offer 'blocks' (and claim grounding). Euro-brands Entreq, Nordost, CAD and Vertex while the U.S. has Synergistics. Others, like Audioquest, Shunyata and Telos are grounding -but with full-sized units.
Balanced power is even newer -and seems to be *as effective* as grounding. Only a few reviews, though.
Ground wires form Nordost and Gutwire. These are new and VERY cost effective.
3)Bybee iQSE. Removes a large part of radiated noise inside a component -incl. RF +switching noise.
4)High Fidelity magnetic-waveguide. Speed-up the flow of electrons -Bybee claimed to do this 10-15 years ago with his 'speaker bullets'. But this co. is finally making it work.
2 more, not so big ?
-Stillpoint's wall panels seem to be effective at removing harmful room reflections.
-Footers -from Stillpoints, Black Ravioli and Magico, reduced vibrations+microphony to a high degree. Even under speakers.
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