martianpc Posted January 26, 2007 Posted January 26, 2007 thought i would share a neat video I made that demonstrates the speakers excursion. -Mike Quote
DrWho Posted January 26, 2007 Posted January 26, 2007 What frequency was that? I know the excursion was pretty large, but I was surprised how smooth it seemed to handle it. No rocking whatsoever. welcome to the forum Quote
martianpc Posted January 26, 2007 Author Posted January 26, 2007 1 hz sine wave off a Denon AVR-3805 about -25 on the volume so not full power by any means, but tearing spiders wasn't on the agenda. -Mike Quote
TheEvan Posted January 26, 2007 Posted January 26, 2007 Oh man, that looks, well how do I say it? It looks wrong. [] Quote
TheEvan Posted January 26, 2007 Posted January 26, 2007 Not wrong in an audio sense. Just my pathetic dirty mind at work... Quote
kelA Posted January 26, 2007 Posted January 26, 2007 Is your video the one with Star Wars EP1 (pod race scene)playing? I dont think I saw the same video, since you referenced a 1k signal from the Denon. Quote
Speedball Posted January 26, 2007 Posted January 26, 2007 ......nothing to hear? I don't understand what makes them move..... Quote
TheEvan Posted January 26, 2007 Posted January 26, 2007 What's making them move is a One (1) Hertz signal, as is 1 cycle per second. The woofer is clearly "making that sound" but it's a sound well below the threshold of human hearing. It's not a 1KH (kilohertz, as in 1,000 hertz) signal. That's what you call Real Low Bass. Quote
kelA Posted January 26, 2007 Posted January 26, 2007 Is your video the one with Star Wars EP1 (pod race scene)playing? I dont think I saw the same video, since you referenced a 1k signal from the Denon. There is another video that I saw. Do a search for Klipsch at youtube, and it is titled RF82. This one is with the pod scene from Star Wars, it looks as if he is bottoming out the woofers. CRAZY. Quote
martianpc Posted January 26, 2007 Author Posted January 26, 2007 really loud with some hip hop will look like that, but its distortion free and isnt bottoming out, at least not for me, his may be but i would doubt it Quote
Jay481985 Posted January 28, 2007 Posted January 28, 2007 i've seen more excursion on my rf-83 [] Quote
TNRabbit Posted January 28, 2007 Posted January 28, 2007 ......nothing to hear? I don't understand what makes them move..... Here's another one: Quote
Speedball Posted January 29, 2007 Posted January 29, 2007 I get it..........Thanks........it's the frequency a person can not hear. Quote
brennyE Posted January 29, 2007 Posted January 29, 2007 now I know that the reference speakers woofers have more throw than that! Quote
LoudnClear Posted January 30, 2007 Posted January 30, 2007 I'd not recommend people go running frequencies less than say 15-20 hz through their loudspeakers. That 1 hz signal is so close to DC that there have to be some serious currents flowing through the voice coil just to get the excursion shown. Maybe the DC resistance of the drivers is closer to 8 ohms than I think, just scares the heck out of me to think of smoke coming out of the ports on the Klipsch speakers. Can't be good for the receiver either, but it might have a protection in place to protect from overcurrent. As I age, I'm getting more wary of such stunts, I've wrecked some of my own property in the past jumping into things that my gut said no on but I ignored it. Quote
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