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Multi-Way Conventional loudspeakers with crossovers

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Old 10th September 2012, 01:25 PM   #71
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Originally Posted by studiotech View Post
Yeah, not many 15" I'd like to use up to 500 if I could help it, unless you want to spring for an AE Lambda TD15! Those are amazing drivers. Maybe a nice 12" would do the job. I really like the B&C because it measures well and has a small neo magnet and a nice, open aerodynamic frame. See some good measurements of larger woofer here:

https://sites.google.com/site/driver...r-measurements

I would certainly use a proper sub under 50-60hz unless you want to follow Stig's lead and have massive OB subs.
The AE aren't that dear, and the do seem to be designed for OB. Unfortunately I can't find a frequency response for them. Anyone used them that can put a good word in for them?
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Old 10th September 2012, 05:30 PM   #72
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See my nearfield measurements in this thread:

HTGuide Forum - Dipole 15 here now too

flat to 20Hz with no EQ. Of course this is up close before dipole rolloff takes effect, but even measured at my listening distance, I only needed minimal EQ to stay flat.
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Old 11th September 2012, 05:44 AM   #73
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Can't look at those things without thinking there is a silver vibrator stuck to the front of it

They certainly are open on the back and ideal for dipole. Was thinking about the height of them if I was to get two for each side they would be 30-36" high just for woofer.

Would a separate tweeter / mids / mid woofers along side work?
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Old 11th September 2012, 10:24 PM   #74
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What about going wide with the woofers. Side by side both low. You could make an H-frame and then place the mid/tweet baffle on top as a separate piece. Or just use one, live with it for a while and if you need more bass, make some nice subs.

Greg
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Old 11th September 2012, 10:47 PM   #75
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Originally Posted by Silent Screamer View Post
OK I'm probably pushing a visit from the men with the white suit that does up at the back
Be nice with them


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Old 12th September 2012, 04:28 AM   #76
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Greg I did consider side by side but that would make each speaker 36+” wide… Plus even with them low I’m not sure I would still get all of the drivers above them.
After my tuning session last night with the RAAL crossover roughly 2.5k and the 2 x 10” crossed over at 1k, I felt the midrange was still a little thin vocally and really needs a pair of proper mid woofers to bridge the gap between the 15” or 18” woofers.
So just doing a speaker count that would be 2 x 120mm (12MUs), 1 x RAAL tweeter, 2 x 8” Drivers (unknown as yet) and the woofers. That is going to make for a high and wide speaker.
Figuring if I could stack both woofers into one H frame standing up, and run a separate frame holding the other 5 drivers, it would make it not so wide and not so tall.
Hoping I can get away without subs but would add as required. Just an idea open to suggestions…

Picowall I will try not to bite them as they strap me up

Last edited by Silent Screamer; 12th September 2012 at 04:41 AM.
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Old 12th September 2012, 04:41 AM   #77
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Might need those guys with the white coats on standby… Call me crazy but I could have sworn that I can hear more coloration of the 12MU paper driver than I can with the Revelators in the Cremonas (which should be far worse).
Is it possible because of the cleanness of the active x-over and RAAL tweter that my ears are now picking up what they didn’t hear before? Kind of cant see the forest for the tress…
Listening to them I feel like I now need a poly or ceramic mid to match the RAALs, something that is equally crisp.
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Old 12th September 2012, 04:45 AM   #78
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Hmmm, like Accutons... Kidding.
In all seriousness you dont really need twin mids if you are going with twin 8 inch woofers.
The Nao note is a good example of this.
If you restrict its passband from say 600hz up it will cope just fine.
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Old 12th September 2012, 05:32 AM   #79
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Probably don't but the twins are for distortion reasons. I keep thinking about the Accutons but then keep talking myself out of it.
Basically if I use the Accuton mids, I would also need to purchase something similar for the 8” and then I need to replicate that all around the room.. Lots and lots of money…
Whereas if I used something like the Audio Technology drivers that are poly, they might be more inclined to blend better with the 10 paper 12MUs I already have, and I could use them up in the rears.
Also thinking about buying the RAAL dipoles to replace the 140-15D I have, and use the current RAALs in a centre or rear speakers.
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Old 12th September 2012, 06:52 AM   #80
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With all of this experimentation(which is great btw), you really need to treat yourself to at least the Dayton Omnimic setup. It really helps take the guess work out of all this and helps confirm that you are hearing things correctly. Best way to train your ears is to listen to various songs for a while, see what you think stands out of is a little weak, take a sweep and see if you can find anything that matches what you think you are hearing.

Of course those 12mu running completely naked are going to sound more colored than the Revelators in a good box. Without proper dipole EQ, they don't stand a chance. Slow down on the crazy driver purchases, really sort out what you've got there on hand and then move forward. Only way to do that is to SEE what you're getting. Then adjust xover, phase and EQ to get a reasonably flat response and now audition the result. Tweak to taste from there. Just having the best drivers in the world does not ensure success. Patience young Padawan you must have.
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