Rumble in a song making my woofers move stupidly - diyAudio
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Old 15th October 2005, 07:38 PM   #1
bigwill is offline bigwill  United Kingdom
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Thumbs down Rumble in a song making my woofers move stupidly

I was listening to a song and I noticed that my woofers were moving oddly - as in, moving in and out in the order of about 2 or 3Hz, roughly in time with the music. This was from an mp3. They sounded fine, they weren't bottoming out or distorting, although this concerned me so I turned off the song. Were my woofers enduring huge amounts of power for no reason? Was the actual amplitude of the rumble low but causing my woofers to excurt quite a lot due to its very low frequency? I'm really worried that their voice coils got unessecarily hot and somehow got damaged. I wasn't even listening at particularly high levels.

BTW The song in question was Michael Jackson - Don't stop 'Til You Get Enough
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Old 15th October 2005, 08:24 PM   #2
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get a subsonic filter
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Old 15th October 2005, 08:26 PM   #3
Did it Himself
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The MP3 was recorded by somebody with a vinyl setup, and not a great one at that. Buy the album on CD and encode it yourself
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Old 15th October 2005, 08:38 PM   #4
bigwill is offline bigwill  United Kingdom
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Quote:
Originally posted by richie00boy
The MP3 was recorded by somebody with a vinyl setup, and not a great one at that. Buy the album on CD and encode it yourself

It sounded awfully clean for vinyl, but what do I know, I'm too young to have experienced proper records

Do you think my speakers could have overheated from this? I'm sure they would move more if I put, say, a 3v battery accross their terminals, and that's not an awful lot of power through 8 ohms
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Old 15th October 2005, 09:11 PM   #5
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No they will be fine. If they are vented speakers the amount of power needed to make them shake like that is peanuts.
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Old 16th October 2005, 11:04 AM   #6
bigwill is offline bigwill  United Kingdom
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They're transmission lines luckily
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Old 16th October 2005, 12:39 PM   #7
djQUAN is offline djQUAN  Philippines
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Quote:
Originally posted by bigwill
They're transmission lines luckily

actually, the same thing happens with TL's as with vented boxes when run below their tuning frequency.
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Old 16th October 2005, 12:50 PM   #8
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Beat me to it dj
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Old 16th October 2005, 01:24 PM   #9
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