HT240ZO Proj Ready to Start
I bought 4 and have been working with them pretty intensely since I got back...
1.) Bass Reflex doesn't cut it; Fb is too high and they run out of excursion above and below it.
2.) Paul K. graciously designed a very cool "non-standard" ; ) enclosure for them that will work very well (down to 30Hz!) and partially corrects this problem, but it is quite large and can only accept a single driver. I am assuming the ML-TQWT backwave partially suspends the driver along with the port resonance, and hope I correctly figured how it works!
At present I am looking at 2 options: Paul K's ML-TQWT with a single driver, or a sealed design with a pair of drivers and F3 of 59Hz or so.
It doesn't seem "right" to use a 9.5" driver in an alignment that F3's at 59Hz, but it does have benefits in power handling at F3, an 8 ohm load, and a smaller cabinet. It also means a tower can hit 104dB anechoic and near 110dB in-room at 120 watts / 60Hz. I hate the idea of a big 3-way with a sub, but want to make these work.
With sealed option: when reverse-mounting a woofer to cancel even-order harmonics, how high can you cross over?
This is part of a tentative plan for the sealed 3-way tower. Given driver frame and magnet are "small" relative to wavelength at the tentative crossover frequency (250 - 350Hz), what do y'all think???
Cheers All / Robert
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