 Re: below 20hz
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Joined: Jun 2006
Posts: 4
newbie
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OP
newbie
Joined: Jun 2006
Posts: 4 |
a heads-up from the avs board, something i didnt realize
"Be careful as sustained tones can cause damage to a driver; overheats the voice coil." ... "Risk of thermal damage"
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Re: below 20hz
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Joined: Jan 2004
Posts: 13,840 Likes: 13
shareholder in the making
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shareholder in the making
Joined: Jan 2004
Posts: 13,840 Likes: 13 |
not the ep500 or 600 digitals. 
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
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Re: below 20hz
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Joined: Dec 2003
Posts: 3,602
connoisseur
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connoisseur
Joined: Dec 2003
Posts: 3,602 |
Oops... mistyped the url... Here. Bren R.
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Re: below 20hz
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Joined: Aug 2006
Posts: 213
local
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local
Joined: Aug 2006
Posts: 213 |
Quote:
Forgive my newbness but I'm doubtfull here.
Enlightenment please?
hello there,
thanks for the response and your curiousity
dont know why it happens, thats just what it sounds like.
like i said it was more of a clicking sound like dominos falling. maybe it is something in the soundcard turning on and off. maybe at 20 hz the soundcard sees the wave as a DC voltage offset instead of an ac wave. not sure. this is on a creative labs audigy card, flavor of the month purchased about 2 years ago.
how about you download the free software, generate a sub 20 hz tone, and let us know what kind of sound comes out of your computer . maybe the software is flawed ? at 20 hz per socond it wouldnt be too hard to count the pulses of a one second duration visually on your monitor ?
i spent about 5 minutes downloading the app and being sure it did what i remembered it did. i think it would have uses when trying to find the sweet/flat spot for your sub in your room. as the avia disk i have will sweep the low tones, but doesnt just play a low tone steadily.
i do think it is good advise not to overheat the coil though.
hth
Randy
Axiom M80, Ep600, Qs8, VP150, Crown XLI 2500 , DBX Driverack PA2, Focusrite Scarlet 2i4
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 Re: below 20hz
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Joined: Jan 2006
Posts: 71
old hand
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old hand
Joined: Jan 2006
Posts: 71 |
This question came up quite obliquely a while back, when someone suggested a surf of this site: rotary woofers . This link How low can we hear? shows some research of hearing tests going down below 20 Hz. Have fun reading! --Martin
Success is not the result of spontaneous combustion: you must set yourself on fire!
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Re: below 20hz
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Joined: Oct 2006
Posts: 6,955
axiomite
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axiomite
Joined: Oct 2006
Posts: 6,955 |
Good answers and references.
I hope you will forgive me if I don't try the experiment myself with my own PC speakers. If the last link's chart data is correct in saying that you need at least 75 to 80 DB to hear below 20Hz, I'm afraid that the noise I will hear is the sound of my PC speakers blowing up as I try to get the volume anywhere near that high.
Great conversation though. My Avia test CD just arrived in the mail last night so I'm currently addicted to chatting about this stuff.
Next month it might be back to how to raise my center diff. skid plate without needing to get into a CV driveshaft or will I really need a new video card when Vanguard is released for the PC.
With great power comes Awesome irresponsibility.
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Re: below 20hz
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Joined: Dec 2003
Posts: 10,420
shareholder in the making
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shareholder in the making
Joined: Dec 2003
Posts: 10,420 |
I vote yes on the new video card and as a mechanic are you talking about the double cardan(U-Joint) style or the actual CV with boot style driveshaft. The boot style is terrible for off road apps.
Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70
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Re: below 20hz
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Joined: Oct 2006
Posts: 6,955
axiomite
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axiomite
Joined: Oct 2006
Posts: 6,955 |
Quote:
I vote yes on the new video card and as a mechanic are you talking about the double cardan(U-Joint) style or the actual CV with boot style driveshaft. The boot style is terrible for off road apps.
Double Cardan to be specific. I have 3"'s of lift and 33"s for tires but I'd like to go either go to 35"s or go flatbelly. Either way, with with zero or minimal body lift and without dropping the dif. It's a Rubicon so I already have a SYE. Send me a personal message if you have further advice. I'm always glad to get it but I don't want to hijack this thread. eerrr anymore...
With great power comes Awesome irresponsibility.
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