Kind of off topic, but is there any advantage to placing a compression driver tweeter inside an enclosure vice outside/on top?
Well, baffle loading will normally allow a lower XO point and can be placed closer to the matching driver, so the preferred location for me or at least mounted to a speaker width baffle if perched on top.
GM
GM
If that is really true, it would perhaps be even better to build a tunable model pipe. IE an analog computing model, with the length of the pipe and port being tunable. I’m thinking telescoping pipes with airtight seals.
It would make tuning to your room very simple and would teach you a lot in the process without the hassle of building a cab.
yeah - fwiw it could be made "convertible" - might not sound much different. (I've not seen 5" ID pvc pipe)
Well, it would have a smoother response with much less stuffing plus tuned a little lower.
My local Lowes has up to 8" available, but at ~$204/20 ft + shipping, I'll stick to cardboard tubes.
GM
My local Lowes has up to 8" available, but at ~$204/20 ft + shipping, I'll stick to cardboard tubes.
GM
that's an extremely depressing price for 8" pvc 🙁 - - are 10" to 12" cardboard tubes reasonable in price at Lowes ?
how about adding a little vent at the end of the line ?
The current anticipated model will be 3" ID PVC. 138 cm with the driver set at 48 cm from the closed end. The open end is just that, open. I could tune the length above the driver with a telescoping tube. Make sense?
'Dirt' cheap, all things considered:
Quikrete 10 x 48" = $6.60
Sakrete 12 x 48" = $16.97
GM
Here is one of two tunable PVC TLs. I found some zebrawood veneer leftover from my Carrera build and wrapped the pipe. Doesn't look so much like plumbing now. So far the potential names are:
1. Tin Man
2. Ricola Horn
3. Plumber's Crack
1. Tin Man
2. Ricola Horn
3. Plumber's Crack
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No, ideally the driver offset is a fixed percentage of total length, normally at 1/3, which equates to 0.349 rather than 0.333 due to the vent's impact on the pipe's 1/4 WL pipe action, so ideally need to have adjustable top and bottom segments plus for max adjustability need one for the vent location [usually at 0.848 - bottom of pipe] and the vent length.
GM
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