golferboy I fine-tuned
the Clearaudio table and cartridge setup with their vinyl for that
purpose. If bad setup were the cause, that would mean I've had many
cartridges on two tables over 10 years out of whack. Doesn't seem
plausible...but who knows. If you've always had this problem, then it's very likely you have a setup problem. Yes, what you have is a common problem but no, it's not inherent in LP playback. What kind of stand do you have your turntable on? What kind of floor supports the stand? What else are you doing to isolate the turntable system from the room? |
golferboy Just read about the KAB rumble filter. I had no idea this problem of pumping woofers was so common. It's almost always a setup problem, not an inherent problem with LP playback. It's best remedied by correcting the setup, rather than by introducing a filter.
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golferboy I
have my turntable on the top of a rack 5ft high on top of a 2x2 ft slab
of marble. The stand sits on points that sit on carpet and go through
to a concrete floor. The speakers are each 4 ft away from the turntable
and are also on spikes that go through the carpet into the concrete
floor. This is also true for the sub. Since I've started listening to
vinyl, I've had 5 different cartridges, two tables, and 6 phono stages.
Woofer pumping has ocurred with all configurations, meaning I have got
the set up wrong about 10 times. In my mind it is not plausible. Perhaps
this pumping is because the Thiels go down to 20hz. If you have a subwoofer four feet from your turntable, that's quite likely part of your problem. Please feel free to think it's "not plausible" that you have a setup problem, but consider this: How do you explain that other Lp setups - with bass extension at least the equal of yours - do not have woofer pumping/rumble problems? |
golferboy Why is having the
sub only 4 ft away from table a problem with concrete? The concrete has nothing to do with it. The close proximity between subwoofer and turntable suggests you may have some acoustic feedback between the two. That is only going to exacerbate any other problem you're having with setup.
I'm not familiar with your turntable. It's possible that it's just not well isolated. That may also be contributing to your problem. |
golferboy BTW, the query "pumping woofer vinyl" resulted in over 100,000 results on Google. That is not at all surprising! There are more cheap turntables in the world than good ones. I'd wager more turntables suffer from improper setup than those that benefit from proper setup. As audiophiles, we're just a tiny percentage of those who listen to LPs. |
