HELP-woofer moves alot when playing lps


Hi-
When I play a record on my TT, I get an excessive amount of woofer movement, even when no music is playing. When I lift the arm off the record with the finger lever, the movement stops, and the phono stage is dead quiet. Its only when I drop the needle and turn it up a bit, the woofer starts to move in and out. I dont get this when playing cds, only lps. I have my system on a shelves, with the table onto and my integrated amp directly under my TT. Might this be an isolation issue? Thanks in advance.
tbromgard

Showing 1 response by mapman

Not uncommon for warps or other imperfections in record geometry to produce subsonic rumble To some extent. Goes with the turf with hi fi phonos. resonance frequency of cart/tonearm can exacerbate the problem with certain combos more than others.

The biggest danger of this is that subsonic rumble uses power that is no longer available for music and clipping can occur sooner, impacting sound quality and putting drivers at risk, so be careful.

BEst solution is avoid records that have this problem too much as much as possible. Get a better quality copy. High pass filters are the common solution, but that is a band aid and effects on sound are usually noticeable.

Better yet, go digital. No subsonic rumble and other vinyl snafus there! :^). Digital can be very good for not much cost these days, much more so than in the past.