arnyk wrote: > Passive speakers generally do not have any electrical high pass filters, > but most active speakers do. > > The reason why is as given above - below their low frequency limit most > speakers are quite willing to absorb power, but generally produce very > little acoustical output and/or mostly distortion.
Thanks for prompt response. I suppose the massive magnets affixed to the drivers in close proximity to the voice coil, plus the fact that there will usually be cone motion induced by simultaneous higher frequencies in actual programme material creating a bit of a draught in the vicinity means that overheating is unlikely in practice. It's interesting that B&W do not recommend plugging the 805S ports with (the already supplied) foam bungs, which would reduce distortion at the expense of further LF loss when connecting the subwoofers. I suppose the subwoofers are best tuned to handle the really low stuff, and the imaging might suffer if the LF performance of the stand-mounts is further reduced. They probably include the bungs for situations where the LF content of the programme material itself is low, so that you can get less distortion (by avoiding the vagaries of the reflex reinforcement) on that sort of music. I haven't noticed any objectionable artifacts yet despite listening to all sorts of music however & I prefer not to fiddle about unnecessarily, so I'll leave the bungs languishing in the back of my cupboard. Having 4 stiff 8" long-throw cones in 2 opposed pairs does enable me to shove quite a lot of air in my room, & having the 2nd subwoofer has made the location of (either of them) much less critical. Can't detect the stereo soundstage of course, just reduces modal reinforcement in my room. Surprisingly musical sounding very low bass this way... Dave :) ------------------------------------------------------------------------ Golden Earring's Profile: http://forums.slimdevices.com/member.php?userid=66646 View this thread: http://forums.slimdevices.com/showthread.php?t=106914 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
