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Why the woofer moves badly when playing certain LPs

Hello. First greeting.
My turntable is Pro-Ject The classic, Phono is Lejonklou Gaio2.4 and Cartridge is AT150sa.

However, I am having problems with my woofer moving badly when playing certain LPs.
Generally, this is not the case with the older, dusty LPs of the 80's, but rather with the record just new released LPs.

I want to get help from someone who knows why this is happening.
Sorry for my broken English.
Thank you very much.

starbusters

Showing 2 responses by bdp24

bdp24's avatar
bdp24
9,465 posts
 
@yeti42, a Townshend Rock 2? Congratulations on your good taste! ;-)  Another of those superior designs ignored by the majority of audiophiles, @slaw (Rock Mk.7) and myself (Rock Elite Mk.2) the rare exception.
bdp24's avatar
bdp24
9,465 posts
 
Actually, many of the lathes now being used have been rebuilt (having been recently rescued from years of storage) to better-than-new condition. Your problem may be that modern mastering avoids the use of the bass filtering that used to be common practice: rolling off the very low frequencies contained in a recording so as to make groove tracking by cheap, mass-market cartridges less demanding. Some current phono amps (Herron for one, I believe) include a rumble filter.
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