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Dual 18" sub idea
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Young Croc
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Joined: 23 December 2018
Location: Denmark
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Points: 951 		Post Options Post Options   Thanks (0) Thanks(0)   Quote FOO Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2024 at 4:04pm
Simply because of experience or should I say the lack of experience regarding high SPL and lowish freq response from 15s.
Only used 15s for low/mid in top box enclosures. But I guess it should be possible to achieve the same result. It might be possible to fit 8 drivers in the same space as the 6 18s would occupy.

But I would be a bit hesitant as I never have heard a 15 deliver the same kind of bass as a 18. 
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Young Croc
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Joined: 23 December 2018
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Points: 951 		Post Options Post Options   Thanks (0) Thanks(0)   Quote FOO Quote  Post ReplyReply Direct Link To This Post Posted: 16 March 2024 at 11:08am
Originally posted by MarjanM MarjanM wrote:

Why not 15s then?

After you asked that, I thought a bit about it, and I actually could use some compact enclosures with small frontal area in more than one occasion, so I will have a go at a dual 15" design. Actually if I could get under 95x40cm frontal area, I then got three other places I could make some clean setups with visible speakers. 
I might go with something like B&C 15SW or DS 115. Plenty of power to drive them, so can't see a issue with big boy 15s like these. 
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Old Croc
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Points: 1740 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMorison Quote  Post ReplyReply Direct Link To This Post Posted: 16 March 2024 at 1:49pm
You would have to be very careful designing a grille to go around the edge of 15" drivers if you want total cab width to be ~40cm. The drivers alone are 39.3 so would already overlap the side panels, meaning you can't extend those forward of the baffle.

You'd likely also have an issue fitting enough vent area on that sized front panel to make full use of big boy drivers.

If you have enough depth available, you might angle the baffle to fix #1, though that adds to the complexity of the woodwork a bit. (Edit - just remembered you were already contemplating that, so perhaps not an issue for you.)


Edited by DMorison - 16 March 2024 at 1:50pm
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Young Croc
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Joined: 23 December 2018
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Points: 951 		Post Options Post Options   Thanks (0) Thanks(0)   Quote FOO Quote  Post ReplyReply Direct Link To This Post Posted: 16 March 2024 at 4:22pm
No problem with a deep enclosure at all. There are several meters clear in all locations. Except one. Might only be around two meters LOL
But yes I would have to angle the baffle. That would help to reduce standing sound waves, so might be a good idea anyways Smile

But your right about port area. That's not gonna do well with the limit amount of front area. 

But first of all, the goal is to get low and loud. Size doesn't matter that much in the end. As long as it can fit under the stage-ish location they will be deployed at. 
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