Just got a KAB filter and installed it. Much better!!!
One thing that is for certein is that many records are often not flat, but have minor warps that cause this great displacement of the woofers due to the low frequency. It's not the problem of the table, the cart, ot the isoltaion. It IS the record and the ONLY way to solve this is to use a low pass filter. It is down 3 dB at 18 Hz and continues down at a steep 18 dB per octave from there. This is not going to cause any negative effects. And bass is in mono anyway from 140 Hz on down and the filter also removes any vertical rumble in this region.
The KAB has in fact has tightened up the bass in my system. Highly recommended!
One thing that is for certein is that many records are often not flat, but have minor warps that cause this great displacement of the woofers due to the low frequency. It's not the problem of the table, the cart, ot the isoltaion. It IS the record and the ONLY way to solve this is to use a low pass filter. It is down 3 dB at 18 Hz and continues down at a steep 18 dB per octave from there. This is not going to cause any negative effects. And bass is in mono anyway from 140 Hz on down and the filter also removes any vertical rumble in this region.
The KAB has in fact has tightened up the bass in my system. Highly recommended!