GM said:Greets!
You're welcome! It comes at a 'price' though, you've got to give us a mini-revue on its performance, how much/type stuffing used and any other things you did for our records in case someone else asks for a W17 design.
GM
Hi
I will do as you suggest, 1.0 lb square feet of polyfil stuffing.
Thank
Gaetan
Greets!
The 1 lb of polyfil used in the sim is per ft^3 of pipe volume (Vb), so this would be ~22.22 oz total ~evenly distributed along the entire path-length, but Dave's diagonal divider makes it hard to experiment with different amounts since only half the line is easily accessible with one side removed, so I recommend experimenting with higher density R-19 fiberglass insulation (without paper backing) or wool batting from the top down and across the bottom and leave the other side empty and only stuff some down the vent if you feel the need.
GM
The 1 lb of polyfil used in the sim is per ft^3 of pipe volume (Vb), so this would be ~22.22 oz total ~evenly distributed along the entire path-length, but Dave's diagonal divider makes it hard to experiment with different amounts since only half the line is easily accessible with one side removed, so I recommend experimenting with higher density R-19 fiberglass insulation (without paper backing) or wool batting from the top down and across the bottom and leave the other side empty and only stuff some down the vent if you feel the need.
GM
gaetan8888 said:
Google's free version of SketchUp aided by an import of shapes from the CAD drawings (VectorWorks). Screen snaps are taken and processed for web posting in Photoshop (all on a Mac of course -- you could do the same thing on a windoz box but it wouldn't be as seemless a process)
dave
GM said:
If you didn't want to attempt the triangular line (with it's inherent non-parallel sides and influence from GM's triangular JX92 ML-TL) you could simply run a partition parallel to the front & back. It would be dead centre down the middle which isn't the best place for a brace, and you'd have to recalculate the space at the bottom.
dave
Hi
I did read somes about transmission line, I did find a short definition;
"A transmission line enclosure is a waveguide in which the structure shifts the phase of the driver's rear output by at least 90°, thereby reinforcing the frequencies near the driver's" (Wikipedia).
But I did not found a web page with a simple explanation of why a high Qts a woofer are difficult or not suitable for a transmission line box.
Anybody can give a simple explanation ?
I even see web pages where it say that you can not made a transmission line with woofer who have a Qts higher than .5
Thank
Gaetan
I did read somes about transmission line, I did find a short definition;
"A transmission line enclosure is a waveguide in which the structure shifts the phase of the driver's rear output by at least 90°, thereby reinforcing the frequencies near the driver's" (Wikipedia).
But I did not found a web page with a simple explanation of why a high Qts a woofer are difficult or not suitable for a transmission line box.
Anybody can give a simple explanation ?
I even see web pages where it say that you can not made a transmission line with woofer who have a Qts higher than .5
Thank
Gaetan
No easy answers tomato.
There's no 3dB loss of sealed WRT ported. That's a fallacy, the ported alignments add output around the tuning, but that's not 3dB added to the reference efficiency which is how it's often described.
How it influences the box size depends upon the driver/box combo, there's no simplification that can be applied.
There's no 3dB loss of sealed WRT ported. That's a fallacy, the ported alignments add output around the tuning, but that's not 3dB added to the reference efficiency which is how it's often described.
How it influences the box size depends upon the driver/box combo, there's no simplification that can be applied.
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