Me, too. I went to Onkens with dual 15" each, to get some wallop out of a 300B set.
Far nicer bass than a sub woofer.
They have 511B horns in again, but I'll be trying either 12P or 12PW open baffles augmented by these soon.
I recently replaced a Eminence Kappa 15LFA with a Faital 15PR400. On paper they look very similair. But it was a really good sound improving upgrade, the Faital goes about 5Hz deeper and augments the mid/low with more of a throaty presents. I like it a lot.
It's filtered low pass/second order with 12mH and 100Uf. I estimate overall system efficiency around 97dB
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Tweeters are GOTO SG-06, (1st order filter with a 1.5uF) and Wideband midrange are EMS LB12EX are unfiltered.. Nice and simple, no padding or notching anywhere.
What voltage do you run the EMS?
They are very smooth speakers, I remember I had them (and their counterpart with fixed magnet) in my shortlist.
I played around with various voltages, my PSU is variable so makes this easy, and settled on 10,5V. Two friends of mine prefer there abouts as well. I do love them, but they take months to break in and a lot of patience to dial in. My openbaffle is in it's 4th iteration and I doubt will ever be finished.
If you decide on buying them I can give you some more suggestions.
Bass loses directivity under 50hz (I'm not sure of the precise frequency), so I can place the subs in room with more flexibility (and need only 2). I'll just have a little headroom over it to pair them with any future speakers.
This article contains good info and the link to the 2 Geddes papers about multisub
Serious Audio: Two Great Articles on Multiple Subwoofers by Dr. Earl Geddes
In my old OB I had XO point at 250-260hz and integration was seamless (with to SS amps of different nature), but they went down to like 60hz @-3db.
I also have appreciated projects similar to stijn001 (google Bastanis for some) with the caveat that the sealed sub was crossed too high. Idk how the EMS driver compares to the modified eminence, but I'm pretty sure the sound quality is better.
I also have appreciated projects similar to stijn001 (google Bastanis for some) with the caveat that the sealed sub was crossed too high. Idk how the EMS driver compares to the modified eminence, but I'm pretty sure the sound quality is better.
One of the benefits of the the LB12EX is that they already play very low. With the right enclosure or OBB size/placement they can be made to provide impressive bass into the 40Hz -3dB region. In my listening space with an modest OBB this wasn't happening. By using a narrowed baffle and without filtering (idd similair to Bastanis), the LB12EX rolls-off earlier, so I could cross-over at around 150Hz (maybe a little higher) to the woofers below. I like a nice low cross-over point. The cross-over point was derived by ear, over months of tweaking.
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