How important are these?
(1) baffle tilt-back (vs elevating off the floor to ear-height, for example)
(2) internal non-ortho parallelogram shape (vs right-angle; externally can be made to look "classic")
(3) exact internal width/depth (if cross-sectional area is same)
I've wanted to do a one-fold horn/TL "Team/Transformer" for some time. Just scrounged some (lesser) furniture-grade/finish 15mm fingered-oak-board box-frame, internally 16Wx85Hx14D "fractionally close" to FH3...
I'd like to compare FH3 to its "antithesis" TL (seal up exit, open up apex). How must the speaker driver then be moved? And what if both ends are kept open, half-wave??
(1) baffle tilt-back (vs elevating off the floor to ear-height, for example)
(2) internal non-ortho parallelogram shape (vs right-angle; externally can be made to look "classic")
(3) exact internal width/depth (if cross-sectional area is same)
I've wanted to do a one-fold horn/TL "Team/Transformer" for some time. Just scrounged some (lesser) furniture-grade/finish 15mm fingered-oak-board box-frame, internally 16Wx85Hx14D "fractionally close" to FH3...
I'd like to compare FH3 to its "antithesis" TL (seal up exit, open up apex). How must the speaker driver then be moved? And what if both ends are kept open, half-wave??
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There is a version that has 90° baffle (still needs to sit on floor or really close). Both sections are tapered so only 1 panel can be vertical. Rear mouth is better shaped will the tilt-back.
dave
dave
DIY has no shipping (out) boxes, accounting, wages, profit, layers of profit for each distributor/dealer.
There is a ton of overhead to be paid out if one goes into the high street/retail shop and buys something.
dave
There is a ton of overhead to be paid out if one goes into the high street/retail shop and buys something.
dave
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Cost differences between commercial and DIY are obvious. My question was about how they compare in performance.
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I have estimated that a good FH3 will be competitive with $5-10k boxes from retail.
dave
dave
Castle acoustics, Rega development and others were among the first to offer shop products based on commercial tqwt designs decades ago. So nothing new with Pearl Acoustics interpretations. I discovered how good published diy qwl designs were decades ago via the now defunct single driver website and forum created by James Melhuish.
Easily outperforming their commercial counterparts. So Good luck to companies like Pearl Acoustics I say. because lets be honest not everybody wants to diy there Fi.
Easily outperforming their commercial counterparts. So Good luck to companies like Pearl Acoustics I say. because lets be honest not everybody wants to diy there Fi.
I take that as, under $5k commercial speakers don't have good cabs (as well made as Dave's).
Commercial small FR "labyrinths" are actually ubiquitous on China taobao/idlefish. I even came up with a name for the class, "Closer To You" (CTY obviously), both listening near-field and imaging/imagining singer-in-front-of-you. The footprint of the FH3 tailwing might present a problem though, I'll have to experiment with folds.
Well, my FH3's are up and running, and what a joy they are. I'm currently using Audio Labs/Aiyima 4" FR drivers with them. The result is very satisfying indeed. After trying all the stuffing permutations, just a small amount of teased polyfil in the choke section was the best compromise. I'm using 18mm birch ply, and so far no major cabinet resonance in the lower registers. An area I am particularly sensitive too.
Here you go. as you can see they are still in the completed build finish. I have some ideas of finish and when done will provide futher pictures. They weren't any more difficult to build than the tqwts I have built. Let me know your thoughts Material is AB grade 18mm Birch Plywood.
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