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Multi-Way Conventional loudspeakers with crossovers

What can I do against 'box sound' ?
What can I do against 'box sound' ?
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Old Today, 07:54 AM   #211
chris661 is offline chris661  United Kingdom
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Quote:
Originally Posted by Stal View Post
I read through this thread rather quickly but don't think this has been put forward as a suggestion. I.e. using more than one drive unit such as MTM. For a given midwoofer design, an extra midwoofer would give 6dB gain which would mean for a given spl level the cone would only need to move by 1/4 of the displacement. For a given internal box design with chosen stuffing or absorbent solution as mentioned previously, having two such boxes dealing with less energy into each box would help, would it not?
I know MTM vs 2 way has its own debate but that aside....
Your maths is out.

If you double the cones, each must move half the amount, so that the same volume of air is being shifted.


With regards to the rest of it, you'd also double the radiating area of the cabinet, so any sound passing through the cabinet walls will also increase in level. Similarly, any sound bouncing around inside the cabinet and exiting via the cone will also increase.

No net gain or loss, I'm afraid.


I do think I covered the unwanted cabinet sound portion of this quite comprehensively in an earlier post: What can I do against 'box sound' ?

Chris
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Old Today, 07:58 AM   #212
scottjoplin is offline scottjoplin  Wales
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Originally Posted by scottjoplin View Post
Interesting, references please.
Anyone?
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Old Today, 08:01 AM   #213
bansuri is offline bansuri  Italy
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Quote:
Originally Posted by Stal View Post
For a given midwoofer design, an extra midwoofer would give 6dB gain which would mean for a given spl level the cone would only need to move by 1/4 of the displacement. .
No it is linear with SPL and voltage, would move 1/2
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Old Today, 01:54 PM   #214
scottjoplin is offline scottjoplin  Wales
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Quote:
Originally Posted by xrk971 View Post
Actually, compression and rarefaction (Boyle’s Law) are not symmetric - hence why sound propagation in air intrinsically has 2nd order distortion, and why we associate that with natural sounding.
I asked for references but nothing forthcoming as yet. Is this an interesting theory or conjecture?
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