aabernathy Posted March 10, 2001 Share Posted March 10, 2001 I recently had the pleasure of auditioning the Earthquake MKII sub - which by the way was outstanding, but what I found interesting about the design was Earthquakes us of a passive radiator called slaps (symmetrically loaded audio passive system). Of course, this got me thinking about the passive radiators used on my two pairs of Klipsch Fortes. According to Earthquake, passive radiators suffer from non-linear forward and backward movements due to what is called spider limitations. The forward movements demonstrate different resistance than the reverse movements causing inaccurate response. Here, read for yourselves. http://www.earthquakesound.com/slaps.htm" TARGET=_blank> There are also several reviews of this system from magazines that go into even further detail. http://www.earthquakesound.com/home3.htm http://www.earthquakesound.com/newpage3.htm Anyway, my question is could the use of these types of passive radiators improve the bass response of the Forte or Chorus or any Klipsch speaker that utilizes a passive radiator? Earthquake says that the radiators can be individually tuned according to their enclosures. Looks like yet another upgrade for the Fortes! What do you audio wizards out there think? Quote Link to comment Share on other sites More sharing options...
aabernathy Posted March 10, 2001 Author Share Posted March 10, 2001 Sorry folks it looks like I messed up those links. http://www.earthquakesound.com/slaps.htm and http://www.earthquakesound.com/home3.htm and http://www.earthquakesound.com/newpage3.htm Quote Link to comment Share on other sites More sharing options...
raeggis Posted March 27, 2018 Share Posted March 27, 2018 I will add some new link to these tread. I wonder how much passive slaps will affect the speaker's bass response when the slap's own resonance is under 20 Fs. The weight of the slap area I think is not a problem. https://psicaraudio.com/product-category/passive-radiators/ Quote Link to comment Share on other sites More sharing options...
JohnA Posted March 27, 2018 Share Posted March 27, 2018 A drone is tuned to the woofer and cabinet volume. Finding a SLAP that would work correctly would be either dumb luck or a custom build. Quote Link to comment Share on other sites More sharing options...
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