QRD‘s on front back side walls? I’ve been told these are not effective on side walls - only front and back. And should not be used in unless in multiples of three (to avoid lobing).
My dedicated audio room build - QuadDiffusor's Big Dig
- Thread starter QuadDiffuser
- Start date
Wil,
I believe that audiophiles don't use QRDs on the sidewalls not because the QRDs are deleterious to optimizing room acoustics, but because the close proximity of sidewalls in typical room sizes violate the rules of minimum separation distance roughly equal to two wavelengths of the lowest frequency bandwidth limit of the 1D QRD, not to mention the expenses of large QRDs and above all, real estate.
In my listening room, I'm lucky to have enough distance from my listening position to the sidewalls to not have to worry.
This has been discussed on this thread previously:
www.whatsbestforum.com
I believe that audiophiles don't use QRDs on the sidewalls not because the QRDs are deleterious to optimizing room acoustics, but because the close proximity of sidewalls in typical room sizes violate the rules of minimum separation distance roughly equal to two wavelengths of the lowest frequency bandwidth limit of the 1D QRD, not to mention the expenses of large QRDs and above all, real estate.
In my listening room, I'm lucky to have enough distance from my listening position to the sidewalls to not have to worry.
This has been discussed on this thread previously:
My dedicated audio room build - QuadDiffusor's Big Dig
Further simplifying, with recommendations expressed in a chart. Accordingly, instead of running my Ground conductor straight through in parallel as I have planned, instead I'll try to spiral it loosely around the tightly twisted Live + Neutral pair. Final Recommendation: The best...
www.whatsbestforum.com
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My custom made in-wall AC cables arrived, in 100m bundles!
From L to R (details inside second image):
16mm2, XLPE insulated single conductor (7-stranded copper), PVC sheathed
10mm2, XLPE insulated single conductor (7-stranded copper)
10mm2 twisted pair, XLPE insulated, XLPE sheathed
6mm2 twisted pair, XLPE insulated, XLPE sheathed
From L to R (details inside second image):
16mm2, XLPE insulated single conductor (7-stranded copper), PVC sheathed
10mm2, XLPE insulated single conductor (7-stranded copper)
10mm2 twisted pair, XLPE insulated, XLPE sheathed
6mm2 twisted pair, XLPE insulated, XLPE sheathed
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This 6mm2 twisted pair AC cable will likely be the star of the show, as so many dedicated listening room builders experienced in auditioning in-wall AC cables have vouched for thinner gauges. I will nevertheless audition it against its larger/thicker 10mm2 twisted pair brother (seen in the background) which can deliver higher current and has lower DC resistance.
I'll simply use the one which exhibits superior audiophile sonics.
I'll simply use the one which exhibits superior audiophile sonics.
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I bought the "stock" version of the 16mm2 XLPE conductor with PVC sheathing because it was readily available and economical, with no need for custom manufacturing.
Using this type of tool, I'll strip off the unnecessary black PVC sheath from the 16mm2 conductor to reveal the conductor within (with its thin XLPE insulation) superb as a Ground conductor having extremely low DC resistance.
I expect to be using the same ~9 meter length of this 16mm2 conductor for all ten of my Ground conductors between the Century breaker box and the component AC power cords inside the audio room. Alternatively, if a thinner more flexible Ground conductor is necessary, I'll switch to the 10mm2 conductor which I also bought as an alternative.
Using this type of tool, I'll strip off the unnecessary black PVC sheath from the 16mm2 conductor to reveal the conductor within (with its thin XLPE insulation) superb as a Ground conductor having extremely low DC resistance.
I expect to be using the same ~9 meter length of this 16mm2 conductor for all ten of my Ground conductors between the Century breaker box and the component AC power cords inside the audio room. Alternatively, if a thinner more flexible Ground conductor is necessary, I'll switch to the 10mm2 conductor which I also bought as an alternative.
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