Having searched for and not found anything to match my LXmini's (built from a Magic521.com kit) as a centre speaker I have come up with a couple of ideas. Of course a third LXmini would be nice, but the height would impinge on the screen, so that's a no-goer. I need a version around 38cm shorter and to retain the same tube length and volume, decided to use concentric tubes, effectively forming a folded tube.
The first design sticks closely to the original Fernco based design, basically adding a larger outer tube. The second shrinks the inner tube diameter to match the 90mm of the woofer magnet which now becomes the far end of the tube and is sealed by the magnet via a gasket. The outer is now the end acoustically closer to the driver, with the biggest difference being the elimination of the Fernco. Not sure if this is a good or bad idea, SL noted he never tested alternatives and it looks like his design used off the shelf plumbing parts for convenience. Anyway, in the spirit of experimentation encouraged by SL, my two suggestions are attached
Would appreciate feedback from anyone with actual experience with any of the concepts here, good or bad - it could save me wasted effort!
And please: do not suggest phantom centre, it doesn't work other than with a small sideways range of the sweet spot.
The first design sticks closely to the original Fernco based design, basically adding a larger outer tube. The second shrinks the inner tube diameter to match the 90mm of the woofer magnet which now becomes the far end of the tube and is sealed by the magnet via a gasket. The outer is now the end acoustically closer to the driver, with the biggest difference being the elimination of the Fernco. Not sure if this is a good or bad idea, SL noted he never tested alternatives and it looks like his design used off the shelf plumbing parts for convenience. Anyway, in the spirit of experimentation encouraged by SL, my two suggestions are attached
Would appreciate feedback from anyone with actual experience with any of the concepts here, good or bad - it could save me wasted effort!
And please: do not suggest phantom centre, it doesn't work other than with a small sideways range of the sweet spot.
