cleandan Posted February 26, 2003 Share Posted February 26, 2003 I have been wondering for a while now, and finally have to ask. I have a KSW-200 sub, down firing, side ported sub. I am curious about the port location. Where is the best place for it, or does it not really matter. Please fill me in on the good, and bad about port location. My sub has always been in a fairly open location so the port placement has never been an issue. I am mostly curious. Thanks. Quote Link to comment Share on other sites More sharing options...
Dustin B Posted February 26, 2003 Share Posted February 26, 2003 With the exception that there should be a least a port diameter (as the rule of thumb) between the port opening and the nearest surface, placement doesn't matter. What does matter is the air speed in the port. The more air the driver can move the higher the air speed gets, and the larger the diameter of the port the lower the air speed gets. If the air speed gets to high first you get compression (which makes it so more power is required than normal to increase the volume) and if it gets to high you get audible chuffing. Flared ports can reach higher air speeds before compression or port noise set in than straight ports. The second thing that matters is the tuning. This will greatly affect how the sub sounds and what kind of extension it will get. It's rare to find a commercial sub that is tuned well below 30hz. Most are tuned in the high 20hz to mid 30hz range. Also of note is that a port and a passive radiator do the exact same thing, just in slightly different ways. Quote Link to comment Share on other sites More sharing options...
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