My pro-ject Xpression III had this low freq response proem with pumping woofers. I first tried using the subsonic filter on my pro-ject tube box, it helped a little. It also reproduced when I upgraded to a new jasmine phono preamp. The problem finally went away after upgrading my table to a new RP6. I guess some tables have this issue and some don't, depending how well the motor is mounted and isolated and how well the table is designed, including the arm.
Low frequency problem while playing vinyl
Has anyone experienced (and knows a cure for) a very low frequency problem while playing records. Just recently I hooked up two old turn tables, Linn LP12 (1980s) and Dual 704 (1980) in my system and the woofers of my speakers are almost jumping out of the speaker cabinets while I am listening to a record. Displacement at least 0.5 inch if not more and the keep "pumping". Needless to say that I didn't experience this issue years ago when I used to play records regularly.
amps: Krell Ev202/350MCx
speakers: Thiel CS7 + smart sub
phono amp: Valvet
amps: Krell Ev202/350MCx
speakers: Thiel CS7 + smart sub
phono amp: Valvet