kilomax 18 making noise [message #37508] |
Thu, 25 July 2002 20:00 |
bqc
Messages: 26 Registered: May 2009
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Chancellor |
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I am using a kilomax 18" in a 12.5 cuft box tuned to 25hZ. I hooked it up to an amp driven by a PC program that generate sinewaves via a sound card. At low volume and at around 25 hZ, I heard some noise coming from the voice coil intermittenly, sounds like the coil is rubbing or something. This is a brand new part. Could it be a defect? or is the Kilomax 18 known to do this at this frequency due to the use of the external heat sink for the voice coil?
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Re: kilomax 18 making noise [message #37510 is a reply to message #37508] |
Thu, 25 July 2002 20:08 |
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Wayne Parham
Messages: 18790 Registered: January 2001
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Illuminati (33rd Degree) |
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The Kilomax 18 shouldn't make any unnatural noises like that.First, make sure this isn't an artifact caused by the computer. If the volume of the strange noise changes as you increase power to the speaker, and then lowers when power is reduced, there's a good chance it's a sound card, software or computer system problem. So you might check another speaker and see if the noise is gone. If the noise is still present with another speaker connected, it's a pretty sure bet this is a computer system thing. If you're sure it's caused by the speaker then you have a defect. A rubbing voice coil will make a strange sound. It often sounds like the voice coil is "bottoming out" even when power levels aren't high. If it's the speaker, send it back where you got it for warranty replacement.
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Re: kilomax 18 making noise [message #37523 is a reply to message #37508] |
Fri, 26 July 2002 10:07 |
freddyi
Messages: 48 Registered: May 2009
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Baron |
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most Eminence I've had are basically "noiseless" - but some of their drivers will exhibit a "wheezing" sound like a box leak at higher volumes around Fb (happened in Dayton 295-070, 4" vc 18" and K43 type) think this is due to pleated suspension's center flapping - in that case some damping goo treatment may help- consider a return/exchange - sound card may be ng
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