Good question. 😉
The fact that it is active is irrelevant, it's what you do with it that counts.
Coaxial means you'll have less work crossing it, no guarantees what that will mean without some progress or details.
Will the woofer handle having no back on the enclosure?
Will the OB be beneficial or not? What is the goal for it? What is the plan to get there?
The fact that it is active is irrelevant, it's what you do with it that counts.
Coaxial means you'll have less work crossing it, no guarantees what that will mean without some progress or details.
Will the woofer handle having no back on the enclosure?
Will the OB be beneficial or not? What is the goal for it? What is the plan to get there?
I am planning it as an active because I believe an active will outperform
a passive. Do you agree?
I will need to be sure I choose a coax driver suitable for OB. If there is nothing
available I would switch to a box.
The OB is said to be generally preferable to box sound. Do you agree?
a passive. Do you agree?
I will need to be sure I choose a coax driver suitable for OB. If there is nothing
available I would switch to a box.
The OB is said to be generally preferable to box sound. Do you agree?
I have been able to bring both types up to the same level of performance.
Yes, this sounds like a plan. Another option would be to cross to another range.
Box sound shouldn't be a thing. An OB may or may not necessarily be more forgiving in cases where the user has not discovered how to manage this box sound.
How much bass to you want is my question, and here is why I ask.
Morel makes a coaxial driver designed for the (I am not making this up) luxury yacht and private jet aftermarket sound markets. Its "Unique Selling Propositions" start with, because its cone (not the tweeter dome, the woofer cone) is inverted, the mounting depth is less than an inch. And when you visualize the task of upgrading the sound in a private jet, that makes sense. Also, the woofer is designed to operate semi-open baffle--again, mounting in yachts, jets, or cars.
(BTW, a little birdie told me that Morel is the OEM supplier for the drivers in the 9-channel autosound system in the Italian supercar by Pagani that costs $3.4 million.)
https://www.parts-express.com/Morel-PowerSlim-6-Integra-Slim-6-Coaxial-Driver-4-Ohm-287-042
The "real estate" dedicated to the tweeter takes away from the pushing area of the woofer, so for a 6-inch nominal woofer, the FS is a rather high 75Hz. I built a design with a .25 cuft sealed box with a 6-inch rear-mounted passive radiator. The design aesthetic is something like, an “Ethan Allen” Colonial- or Federal-era Mantel Clock. However, a Mantel Clock updated to Scandinavian or US Mid-Century-Modern style (as exemplified by Charles and Alexandra Eames). The cabinet was my design, executed by Corwin Butterworth.
Here's a YouTube of it playing:
One nice thing is that you can buy a car kit of two drivers plus two assembled crossovers with adjustable tweeter level from Crutchfield. Perhaps not what you want, but others might be interested.
https://www.crutchfield.com/S-9AKKekuF4yh/p_210VNCIN62/Morel-Virtus-Nano-Carbon-Integra-62.html?
My crossover was LP: 2nd order Linkwitz-Riley crossing over at 2500Hz to HP: 3rd order Butterworth.
Best of luck
john
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If I felt the the need to add wings to my listening room I would
certainly consider this direction.
certainly consider this direction.
I assure you that it is a wonderful-sounding coaxial driver!
I have experience with Morel's 424 and 524, and I think there is just something so musical about the carbon-fiber cone.
Seriously--what are your other options? Danny @ GR Research told me that the famous SEAS transparent-cone coaxial (H1353) measured terribly.
Morel's 624 gives you more oomph, but it's a trade-off.
SB's coaxial drivers are "affordable,"...
The SEAS Graphene coax is nearly $600 each (for a 5-inch driver!)... and look at its graph!!!
So, what's the plan, Dude?
jm
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I have a Radial Plan...
https://radianaudio.com/collections/coaxials-neo/products/5215neo-15-neo-coaxial-speaker
https://radianaudio.com/collections/coaxials-neo/products/5215neo-15-neo-coaxial-speaker
Emphatically no!!!
By any means.
You are throwing 80 years or more of speaker cabinet development out the window.
OBs ,well made (hint: LARGE) have a different and some times "interesting" sound, more of a novelty item than anything else, nothing beyond.
But lately OB has become a buzzword or Mantra and magically appears to be the solution to all Evil in the World, or so it seems; leading to acoustical nonsense such as 15" woofers with a 4" wood ring around, or palm sized OB computer monitors as shown in recent threads here.
Small world.
In the 80´s I commercially made a batch of inverted cone 6" speakers , with the 82mm ferrite magnet inside the cone, the whole thing was very pancake looking.
Intended for mounting in shallow car doors, took forever to sell, so I didn´t repeat the deed.
But could make more if so asked.
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Hmmm... The crossover mentioned on that driver's data sheet does not appear on their web site. However, other "322" crossovers they offer cross over at 1,500Hz or 1,800Hz. I am an old fuddy-duddy, and my knowledge base goes back to about 1968... so, I might be completely out of date here. But, as Nina Hartley would say, "Let's do a little Thought Experiment."
1500Hz has a wavelength of... 9 inches. 1800Hz has a wavelength of... 7.5 inches. 1500Hz waves are smaller than the diameter of the 15-inch woofer. 1800Hz waves are... HALF that diameter.
I may be all wet, but I'd be worried about Doppler Distortion. The 15-inch wide source for a 7.5 inch wave is moving in and out over a span of 11mm, it appears. I'd be afraid that would make for distortion.
If I were putting a 15-inch driver in a 3-way design, say for the sake of discussion, a larger versions of:
https://www.madisoundspeakerstore.c...o-sb12.3-sb-acoustics-12-dual-midrange-3-way/
I'd want to cross over the 15-inch woofer to a 7.5-inch woofer mid at 262Hz--or, 300Hz if you insist. Then, cross the 7.5-inch woofer-mid to a tweeter, depending on the tweeter, at 1,500Hz or 2,500Hz.
So, just my two cents, that coaxial is built for commercial theaters or very large home theaters. When I am choosing drivers, I look at the piano keyboard. Middle C is 262Hz--that's where an awful lot of important action is taking place.
I'd want a no-cost no-obligation listen before plonking down $3600 for a pair of coaxials.
Best of luck,
john
1500Hz has a wavelength of... 9 inches. 1800Hz has a wavelength of... 7.5 inches. 1500Hz waves are smaller than the diameter of the 15-inch woofer. 1800Hz waves are... HALF that diameter.
I may be all wet, but I'd be worried about Doppler Distortion. The 15-inch wide source for a 7.5 inch wave is moving in and out over a span of 11mm, it appears. I'd be afraid that would make for distortion.
If I were putting a 15-inch driver in a 3-way design, say for the sake of discussion, a larger versions of:
https://www.madisoundspeakerstore.c...o-sb12.3-sb-acoustics-12-dual-midrange-3-way/
I'd want to cross over the 15-inch woofer to a 7.5-inch woofer mid at 262Hz--or, 300Hz if you insist. Then, cross the 7.5-inch woofer-mid to a tweeter, depending on the tweeter, at 1,500Hz or 2,500Hz.
So, just my two cents, that coaxial is built for commercial theaters or very large home theaters. When I am choosing drivers, I look at the piano keyboard. Middle C is 262Hz--that's where an awful lot of important action is taking place.
I'd want a no-cost no-obligation listen before plonking down $3600 for a pair of coaxials.
Best of luck,
john
If it doesn't Doppler, it's not loud.
Or that is what Dance students taught me. 2-way systems with gross Doppler out-lived 3-way systems that didn't Doppler before they melted. The maybe 20% Doppler distortion on peaks is what they heard for "beat". A clean system needed to be turned way up to ear-bleed.