Thanks. sorry for the stupid question. My An 10's are .23 so the Jordans are actually a better choice for OB.
Qts of a full range driver is not so relevant in an OB design if you are going to support it with a woofer for bass duty.
Well, I'm sorry, but no amount of Qts will let a 4" driver play down to 80Hz in OB. Even 160 is pushing it.
I'm a big advocate that if you have a nice big woofer to help, why not really let it help the often smaller full range driver so it doesn't have to struggle playing down low, and frees it to cleanly play the higher frequencies.
I will often XO in the 250 to 400 range depending on the curves used.
I'm a big advocate that if you have a nice big woofer to help, why not really let it help the often smaller full range driver so it doesn't have to struggle playing down low, and frees it to cleanly play the higher frequencies.
I will often XO in the 250 to 400 range depending on the curves used.
Baffle size and shape not driver size is the main deciding factor. Also bare in mind that the dipole cancellation doesn't happen in the real world quite so simply, you need to take into account distance from front wall and reflections. Crossing over at 160 Hz is perfectly doable
Well, I'm sorry, but no amount of Qts will let a 4" driver play down to 80Hz in OB.
Actually, assuming the driver has a sufficiently low Fs & reasonable Qt, there's no reason why it can't play down to 80Hz on an open baffle. It just won't do it very loudly.
Actually, assuming the driver has a sufficiently low Fs & reasonable Qt, there's no reason why it can't play down to 80Hz on an open baffle. It just won't do it very loudly.
Well, that was kinda my point...
But you phrased it much better than me, and more succinctly. Thanks!
Scott Joplin is doing just that.
dave
scott - did you ever post any photos of that?
Well, I'm sorry, but no amount of Qts will let a 4" driver play down to 80Hz in OB. Even 160 is pushing it.
I'm a big advocate that if you have a nice big woofer to help.......
I will often XO in the 250 to 400 range depending on the curves used.
Not technically true, but the baffle will be quite wide and power handling would be limited to as little as a fraction of a watt, so realistically not an option.
Me too; a good 'rule-of-thumb' is to XO at the driver's effective [Qts'] mass corner [fhm], which for this driver would be in the ~123-225 Hz range depending on amount of series resistance based on published specs with of course the highest power handling, smallest baffle being with minimal series resistance [~0.5 ohm speaker wiring only].
fhm = 2*Fs/Qts'
Qts' = Qts + any added series resistance: mh-audio.nl - Home
GM
Arranged a bit differently now, this is an old photo, the Jordan's are just in the VTL cabinet with the back removedscott - did you ever post any photos of that?
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