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Old 19th February 2008, 06:12 PM   #1
KMMM is offline KMMM  Norway
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Default MLTL's - is the stuffing too compact?

Hi,

I'm not shure if I have a problem here, but I've made a pair of MJK's MLTL with Lowther DX3
And I whonder what the effect of packing the stuffing too compact would be in this construction?
Are there typical results if you do this mistake?

Thanks for any help

KMMM
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Old 19th February 2008, 08:10 PM   #2
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Primarily you'll find it starts to attenuate more of the midbass than is ideal & increasingly, the bass, so LF output will start to be reduced. Subjectively, there's a risk of the dreaded 'shut-in' effect too, where the sound appears somewhat constrained.
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Old 19th February 2008, 08:56 PM   #3
KMMM is offline KMMM  Norway
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OK Thank's

I have a dipp arround 50 - 90 Hz (quite steep-15dB) and was whondering if it might be the problem.
The other thing I was thinking might be the reason, is the room and it's acoustics.
But that would belong another place on this forum

I guess the stuffing is not the problem after all then.

Thanks!

KMMM
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Old 19th February 2008, 09:00 PM   #4
ttan98 is offline ttan98  Australia
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I apply the rear of driver and top of cabinet with damping mat, and then cover with polyfill and also one side with poly fill. Too much damping this way.

Even this changes the sound character, enhanced mid range, bass reduced and sounds slower, sound stage reduced slightly. I may remove damping mat and put only polyfill and I will experiment further.

Like Scottmoose says, try applying top, one side and rear from top to bottom with a 1in poly, wool or acrylic fill. experimentation is required here.
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Old 19th February 2008, 09:00 PM   #5
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The room would be my guess. If possible, try moving the speakers around a bit & taking some rough measurements (doesn't matter if you can't keep them in the new position, but it'll help establish if it's a room or speaker related issue.
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