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Old 20th August 2004, 01:47 PM   #1
DirkD is offline DirkD  South Africa
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Join Date: May 2004
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Default Scanspeak Flow Resistance

Does anyone have experience using the Scanspeak Flow Resistance Vent. I am planning on using one in a 13 liter sealed enclosure with a Scanspeak 18W/8535 woofer. How about substituting a Flow Resistance Vent for the port in a Proac R2.5 clone (32 liter box)?

D.
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Old 20th August 2004, 01:58 PM   #2
tiroth is offline tiroth  United States
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In my limited experience, it doesn't have a big effect in relatively low-Q designs; for example, in a sealed Q=0.9 box adding the vent raised Fs and lowered Q but didn't really alleviate the sense of boominess despite taking off a good bit of extension. It was much more effective to simply heavily stuff with fiberglass. I've heard there is more of a difference when we are talking Q ~ 1.3.

My gut feeling is that since the Proac 2.5 is a fairly large box you won't see much advantage going aperiodic--if you want to avoid the port I would just seal it. There is still a good amount of bass.

So, I guess my answer is your 13L box is probably a more promising candidate. But I think building a larger box and sealing it is usually preferable if it is an option.
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