Originally Posted by FOH
I agree with one of the above posters, the value is extraordinary of any of these for HT. From a 4722, to an offering from the AE
series, to the big Screen Array stuff. I'm no JBL fanboy, but they've done so much R&D that the entire industry benefits from. These designs offer so much performance for the money, it's incredible. Low distortion, high output, pattern control.....so many people would be better served going down this road as apposed to a significant amount of other marginal struff out there for HT.
Nice trip down memory lane there with MK's stuff. I forgot about those big 3 ways of his.
I agree. If you have the space, waf and/or AT screen to make the JBL cinema speakers feasible, it is a great option. The 4722N is probably the best option as it is ready to rock out of the box. There isn't even a need for external amps. Nearly any receiver will power these just fine.
The bigger stuff is more complex and the situation has to be right to make use of them.
JBL, due to their massive R&D and production capability are able to dominate the commercial theater market. It is hard to beat their performance for the money. To think that the retail price on their highest end speaker is only ~$5000 and that is good enough for the Academy Awards, that says quite a bit.
Originally Posted by Scott Simonian
Yes. A quad, very tightly packed cube directly underneath the 2380. The C-C will be WAY closer than anything that JBL builds, themselves. This is kind of a proof of concept build so it's definitely NOT going to be perfect project/speaker system and I do not intend it to be... for the most part anyway.
Looks like I will be using the DCX for the crossover and that supports 48dB/oct filters if I indeed need that steep a slope. I've got a lot of options.
No, haven't bought the Beyma's yet. Still shopping around but all the stuff that I'm interested in is too expensive. I do know that I want the 2445/2380 combo to operate as wide as possible. That means I'll cross the sealed quad 15's at ~600hz, let the 2445 operate up to the end of the midrange/bottom treble. That is not going to change, not until I can listen to the system, myself.
I'm sure the JBL AM's are awesomely great speakers but this is what I plan to build. It may suck though so I'll definitely need some help fixing it if it sucks ass.
Be careful with the 48db filters. They can introduce some weirdness, although I haven't used them with the DCX. If the nulls are about 20deg apart like they probably would be with the Beyma on to of the 2380, a 24db/oct crossover will probably give you a 10deg window where it is pretty flat. A 48db would probably give you 13-15deg. Obviously this is the acoustic slope, not the electronic. If the Beyma is falling at 12db/oct a 24db/oct setting on the DCX will give you about 11-12deg. IMO, that is pretty tight, but you might be fine with a pretty narrow vert window.
Is there a reason why you want to use the 2445 over the widest range possible? Although the ring radiators like the 2414H is a cheaper driver, I'd bet it will sound better in a home environment over the 2khz to 6khz range than the 2445. It should also be better than the Beyma over the 5khz+ range. It is simply newer and better technology. The only disadvantage it has is lower power handling and ultimate SPL, two things that don't matter to you.
Even if you want to run the 2445 up as high as possible, the Ewave WG+2414 crossed at 4khz will give you the same vertical nulls as the Beyma at 5khz.
I just don't see any reason to run the Beyma. The Ewave+2414 will even give you a range that you can try 2khz - 4khz to see which you prefer. With the Beyma you are pretty much stuck with a steep slope at 5khz. The Beyma can't play lower than that and any higher cross will mean nulls on axis.