Talk:Loudspeaker enclosure

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[edit] Leaks In Acoustic Suspension

I would like to see a reference where the principle behind your theory on acoustic suspension cabinets needing leaks can be found. I have never heard of this and would like to be sure it is accurate. Most people spend a painstaking amount of time to insure there are absolutely no leaks in their AS systems.

Thank you

The spacemonkey

I've seen it referenced in severl DIY design rationales for sealed boxes, eg Linkwitz's Pluto+ subwoofer design. But more importantly, most speakers have some air leaks, through the magnet structure/dust cap, or the surround or the cone itself. So in those cases, barometric pressure changes will not bias the position of hte voice coil in the gap. But for speakers with rubber sourrounds, plastic cones and dust caps, it's possible to have sufficiently low leakage that the speaker becomes a barometer or sorts, with the bias position and slow motion of the cone bias being an indication of air mass movement into and out of your location. The leakage path, intentional or not, should be, of course, quite small, such that the resistance to air flow is high enough that, at audio frequencies, the enclosure is effectively fully sealed. ww 21:00, 18 February 2007 (UTC)