This particular subwoofer has peaked my interest. Are there any other links or projects my
fellow forum members would recommend?
Transmission Line Subwoofer Project
Regards,
Dan
fellow forum members would recommend?
Transmission Line Subwoofer Project
Regards,
Dan
It is is a good concept and has been done often.
https://www.t-linespeakers.org/projects/steve/index.html
https://www.t-linespeakers.org/projects/nick/index.html
And of course Nelson’s El Pipo
https://www.passdiy.com/project/speakers/the-legend-of-el-pipe-o
BUT… none of these were really designed, they all use Classic Design Principles which are little more than a guess.
Do it, but the line needs to be properly modeled if you want optimum performance.
An ML-TL version would let you get away with a shorter pipe. This is a pipe for a 7” driver, the pipe 10”. They will be mass loaded.
Aside: All 3 of these woofer pairs (come with a basix active XO, 2 are projects) are free for anyone can come pick them up. The projects you have to promise to finish.
I encourage, very strongly, using pairs of woofers push-push to cancel reactive forces. Push-pull can also be push-push but it is harder to get the coupling and if you ar eusing decent woofers having the magnet hang out in free air is disadvantageous.
If you have cheap woofers, push-pull cancels 2nd order (little of that in a decent woofer) leaving the third. If the second is bad enuff you can win.
Aside: the 12” pipe and 8 12” Foster woofers are the basic ingredients of an isobaric push-push push-pull sealed woofer. 4 woofers fir into each end of the pipe
How fat a sonotube can you get?
dave
https://www.t-linespeakers.org/projects/steve/index.html
https://www.t-linespeakers.org/projects/nick/index.html
And of course Nelson’s El Pipo
https://www.passdiy.com/project/speakers/the-legend-of-el-pipe-o
BUT… none of these were really designed, they all use Classic Design Principles which are little more than a guess.
Do it, but the line needs to be properly modeled if you want optimum performance.
An ML-TL version would let you get away with a shorter pipe. This is a pipe for a 7” driver, the pipe 10”. They will be mass loaded.
Aside: All 3 of these woofer pairs (come with a basix active XO, 2 are projects) are free for anyone can come pick them up. The projects you have to promise to finish.
I encourage, very strongly, using pairs of woofers push-push to cancel reactive forces. Push-pull can also be push-push but it is harder to get the coupling and if you ar eusing decent woofers having the magnet hang out in free air is disadvantageous.
If you have cheap woofers, push-pull cancels 2nd order (little of that in a decent woofer) leaving the third. If the second is bad enuff you can win.
Aside: the 12” pipe and 8 12” Foster woofers are the basic ingredients of an isobaric push-push push-pull sealed woofer. 4 woofers fir into each end of the pipe
How fat a sonotube can you get?
dave
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My 17-foot labyrinth measures and sounds really nice. Kind of a tall fella', three sequenced shafts are within the tall enclosure so as to have the driver near the floor and the exhaust minimally interacting with it close to the ceiling.*
TL rather close to a BR in nature if not in core principle, no kidding. But with more tools for adjustment. Labyrinth more like a very large baffle.
B.
* yes, the textbook model frightens everybody about rear waves. But once there is adequate separation of driver and the port and room influences come to scramble waves, not a factor worth fretting about
TL rather close to a BR in nature if not in core principle, no kidding. But with more tools for adjustment. Labyrinth more like a very large baffle.
B.
* yes, the textbook model frightens everybody about rear waves. But once there is adequate separation of driver and the port and room influences come to scramble waves, not a factor worth fretting about