Iceman Posted February 14, 2003 Share Posted February 14, 2003 What is a passive radiator? How does it work? What does it do? What is it made of and what does it look like? Quote Link to comment Share on other sites More sharing options...
jstanton8 Posted February 14, 2003 Share Posted February 14, 2003 Ask DustinB, he can tell you...all I know is that they are used instead of vents/ports in a speaker cabinet. I had some Pioneer speakers that had PRs in them and they looked identical to the driver itself except there was no magnet/coil, it's just weight... Quote Link to comment Share on other sites More sharing options...
jstanton8 Posted February 14, 2003 Share Posted February 14, 2003 posted twice oops Quote Link to comment Share on other sites More sharing options...
TheEAR Posted February 14, 2003 Share Posted February 14, 2003 "What is a passive radiator? How does it work? What does it do? What is it made of and what does it look like?" A passive radiator is like a woofer with no motor structure(magnet,VC). It works with the pressure created by the active woofer in the sealed cabinet. What it does is it augments low end output of the active driver,reinforcing the low end.Its like a port without the port noise and can be "tuned" by adding or removing weight.The more weight is loaded the lower the tuning,the lighter the moving membrane(of the PR of course) the higher the tuning. What does it look like,may look like the active driver.Sometimes it looks like a solid disk with a very large sourround.The PR cone,piston has to have around double the travel of the active woofer cone.Providing both the woofer and PR piston are the same size. Now back to work...I am at work. LOL In a hurry Quote Link to comment Share on other sites More sharing options...
Dustin B Posted February 15, 2003 Share Posted February 15, 2003 http://www.stryke.com/prfaq.htm Bottom line is a passive radiator is just a different method for achieving the same end result as a port does. That being a bass reflex alignment. Some claim PR subs have an inferior transient response in comparison to a ported system which has an inferior transient response to a sealed system. Done properly though, all three can have excellent sound quality or done incorrectly all three can have very poor sound quality. Doing it right usually involves tuning the port or PR very low to push the rise in group delay that comes with a bass reflex system to a frequency range where it isn't really audible. Quote Link to comment Share on other sites More sharing options...
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