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Multi-Way Conventional loudspeakers with crossovers

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Old 5th October 2012, 09:03 PM   #311
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Quote:
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But let's back up a little. What are your real goals? Are you looking for super clean bass that can be run off an SET amp, or do you just want big bass fun?
I want super fast ,clean & accurate bass with no overhang. I'm not into bloated booming playing with your guts bass. To me thats just for the hell of it and not 'music'. Certainly not the music I listen to.

I'm a fan of large headroom. All seems fine and then when you turn it up just a bit too much it grabs you by the throat, shakes you around and spits you out.

The overall sound I want is that sumptuous effortless you get when operating comfortably within spec and with an iron grip by the amp. Like the acceleration in a big car that gently pushes you back into the soft leather seat as it approaches warp speed compared to a small car that is all whizzy and you have to wring the nuts off it.

I think high efficiency is one part of 'my sound'. I'd prefer speed and attack over ultimate depth if I have to choose.
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Last edited by JRKO; 5th October 2012 at 09:17 PM.
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Old 5th October 2012, 09:16 PM   #312
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In my experience you can get that with lot's of surface area using cone drivers. Mostly I've done that with Open Baffle, but you don't have the floor space for that, right?

Certainly there are folks here who have done massive cone surface in a box and can advise you. Stig Eric comes quickly to mind. One you get to the surface area of a pair of 18s, or better yet a quad of 18s, bass firms right up and gets massive and clean. Even cheap 18s will do it.
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Old 5th October 2012, 09:39 PM   #313
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Yeah I dont have the floorspace for the OBs I'm afraid.

Will an 18 get high enough to cross with a horn?
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Old 5th October 2012, 10:16 PM   #314
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I guess it could depending on the compression driver.
BMS 4590 comes to mind at 310 ea.
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Old 5th October 2012, 10:22 PM   #315
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Quote:
Originally Posted by JRKO View Post
I think high efficiency is one part of 'my sound'.
one part out of many

what you descibe certainly wont come easy
and from my personal experience, the sound you dream of, and descibe, mostly depends on the crossover design being fully integrated into the complete speaker design
thats what its all about, the rest is secondary
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Old 6th October 2012, 12:28 AM   #316
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Will an 18 get high enough to cross with a horn?
Most will not - unless it's a huge horn - some will. That's what I liked about the P.Audio Blue Monster (BM) woofers. Now that they have changed all bets are off. There should be a good stock of the old ones on the shelves, yet.

Someone here is likely to know a good 18 that can cross high. If not, an 8 or 10 inch midrange can work well.
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Old 6th October 2012, 06:54 AM   #317
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maybe FaitalPro 18FH500
in any case, its got the desired high effciency, and goes really deep in large BR, and the price is right(Lean)
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Old 6th October 2012, 08:15 AM   #318
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and interestingly, it might work with Onken ports

optimal BR is somewhere around 275 liter, and port length is almost zero
means you can raise port area quite a lot, and still keep the length reasonable

I tried to increase box to 350 liter
and calculate a 500cm2 port area
gives perfect port length of 25cm
fine tune a bit for more smooth rolloff
and voila, a new Onken is born (-3db/30hz)

man, now Im tempted myself
one problem though
this big Onken box size is only suited for 2way
simply too high for a 3way
nah, I dont think it will work
but wide and low BR with big slot ports would still work
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Old 6th October 2012, 09:20 AM   #319
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and now we are at it
the new 18FH510 will do a smaller +150liter big ported Onken style box
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Old 6th October 2012, 09:55 AM   #320
Elias is offline Elias  Finland
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Yeah I dont have the floorspace for the OBs I'm afraid.
But you do.

This kind of dipole bass can be placed against the front wall, too.

Click the image to open in full size.
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