Guest dogmeninreno Posted March 29, 2003 Report Share Posted March 29, 2003 I know this was discussed before but what was the final opinion? I have had vented and unvented. The vented allow quite a bit of air to escape during woofer excursions. Dale in Reno..... Link to comment Share on other sites More sharing options...
Guest Posted March 30, 2003 Report Share Posted March 30, 2003 >what was the final opinion? I have had vented and unvented<I think I recall the final consensus was that the physics say that it shouldn't matter that much, but the purist in us all says it's "just not done."Bret Link to comment Share on other sites More sharing options...
tysontom Posted March 31, 2003 Report Share Posted March 31, 2003 > I know this was discussed before but what was the final>opinion? I have had vented and unvented. The vented allow>quite a bit of air to escape during woofer excursions. Dale in>Reno.....Hey Dale,Remember that the AR woofer is basically an acoustically-sealed speaker, and that major air leaks are not particularly welcome. Since the dust cap opens to the magnet assembly's pole piece, it also is open to the inside of the speaker as such. The idea is for the dust cap to be air-tight. One wonders, then, how air "vents" from under the dust cap when the woofer is making those 1/2-inch excursions: the answer to that is through the holes in the top portion of the voice-coil bobbin, or former. It then becomes air moving around inside the cabinet rather than out into the atmosphere."Air tight" does not mean hermetically sealed. The woofer cone would want to move in and out with barometric-pressure changes if the cabinet were completely sealed. Therefore, all that is desired with the acoustical seal is enough elasticity to create the acoustical restoring force for the cone down to the lowest usable bass frequencies.--Tom Tyson Link to comment Share on other sites More sharing options...
Guest dogmeninreno Posted April 5, 2003 Report Share Posted April 5, 2003 >> I know this was discussed before but what was the final>>opinion? I have had vented and unvented. The vented allow>>quite a bit of air to escape during woofer excursions. Dale>in>>Reno.....>>>Hey Dale,>>Remember that the AR woofer is basically an>acoustically-sealed speaker, and that major air leaks are not>particularly welcome. Since the dust cap opens to the magnet>assembly's pole piece, it also is open to the inside of the>speaker as such. The idea is for the dust cap to be>air-tight. One wonders, then, how air "vents" from under the>dust cap when the woofer is making those 1/2-inch excursions:>the answer to that is through the holes in the top portion of>the voice-coil bobbin, or former. It then becomes air moving>around inside the cabinet rather than out into the>atmosphere.>>"Air tight" does not mean hermetically sealed. The woofer>cone would want to move in and out with barometric-pressure>changes if the cabinet were completely sealed. Therefore, all>that is desired with the acoustical seal is enough elasticity>to create the acoustical restoring force for the cone down to>the lowest usable bass frequencies.>>--Tom TysonHi Tom, That reinforces my thoughts exactly..Thanks...I will replace the caps with sealed units next week and run another spectrum with vented and unvented caps just for fun..Dale in Reno.... Link to comment Share on other sites More sharing options...
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