2. analog
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Woofer motion problem.

Whenever I hook up a turntable to my rig, or play a flac file that has been recorded from an analog rig, my woofers flutter in and out dramatically more than with even the most intense digital music. I believe this is like flutter and wow that is extremely low frequencies but not sure. I notice these movements during some of the quieter passages on the LPs. Can anyone explain this and tell me whether it can be prevented?
macd
almarg's avatar
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almarg
9,670 posts
 
It was perceptive of you to notice that! It sounds like the compliance of your cartridge, and the effective mass of your tonearm, are not optimally matched, resulting in the combination having a resonant frequency in the "warp region" of typical records (a few Hertz). The following writeup provides a good explanation:

http://www.audioasylum.com/cgi/t.mpl?f=vinyl&m=793257

Regards,
-- Al
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ncarv
983 posts
 
I've had the same problem. It got better when I put my turntable on an Arcici stand with air bladder support.
It is not completely resolved, but much better.
I'm thinking about trying a KAB rumble filter. Go to the home page, then select "sound processors," scroll to KAB RF-1:

http://www.kabusa.com/
sufentanil's avatar
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sufentanil
782 posts
 
I used to have these problems, as well. They resolved completely with the KAB rumble filter, which eliminates the extremely low frequencies that contribute to the woofer pumping.

Michael
mtandrews
43 posts
 
Back in the day I had a big ol' honkin' reciever (marantz or Technics, can't remember which) that had a switch on it that said Subsonic Filter, if I didn't turn this ON the woofer would do what you are descibing when I played records.
macd OP
103 posts
 
Thanks guys for your responses. Do you think this could harm a speaker?
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