Ready to RUMBLE

You should try Theo's advice and attempt to eliminate the rumble mechanically. If it doesn't work, I recommend the KAB rumble filter, which at a very reasonable price will eliminate rumble and might actually improve the sound by relieving the amps from trying to reproduce infrasonic frequencies, and removing the unnecessary and possibly harmful fluttering of the subwoofer.

I also own a P9 and a C2300. I have hardwood floors and a large KCS basshorn in my room. I had a rumble issue prior to installing a rega wall shelf. I previously had my P9 on a 3 inch maple slab with brass points on a Billy Bags stand. Now I do not have an issue thanks to the isolation of the shelf. I recommend that you attempt to isolate your table via a wall shelf prior to installing a rumble filter in the signal. Make sure that you mount it directly into the studs.

Thank you Rich62. I am finding most of my issues are LP related and not hardware related.

Some LPs have infrasonic frequencies "cut" into the record grooves as the master disc is made. I experienced it mostly with classic rock records, not as much with jazz records. I understand warps can also cause rumble. The KAB website explains it in more detail.

Any type of filtering is controversial among audiophiles as it messes with the signal and adds another component in the signal path so purists frown upon it. I had a rumble problem with my previous setup and I couldn't bear looking at the woofers jumping out of the speakers sometimes even before the record began to play. I got the KAB and never looked back. From the many rumble threads on A-gon over the last few years feedback from the KAB owners appears to be overwhelmingly positive. My experience has certainly been just that.

I used to have issues with my non-sprung table on a very springy hardwood floor years ago. I ended up buying the Machina Dynamica Promethean Base which uses heavy duty springs sandwiched between maple isolation bases. Footfalls were nearly non existent and the sound improved dramatically.

Shakey