Woofers getting workout, but no bass

I have some records that are worse than others when rumble is observed via cone excursion. Same cartridge. Concrete floor...shelves made with carbon fiber/epoxy 1/2 inch thick. The Navy uses this material on bulkheads to minimize internal shrapnel from external explosions. No clamp or other weighted object reduce rumble in my case. Probably in most cases.

Clcockrum: The ring I have is fairly light and isn't much help with most warped LPs. I used to own a VPI table and their peripheral ring worked wonders for warped records.

The TTWeights ring does nothing for my rumble problem, but if I recall there were more than 1 option of rings at TTWeights and I think I got the lightest one.

Well so far I've reversed phase, add damping fluid to my Triplanar arm, double checked level, tried raising lowering VTA, all to no avail.

Kevin at KAB suggested that his filter would be a bandaid and that damping should be the real solution, but unfortunately that didn't work.

Apart from trying a filter, I'm left with the notion of replacing the table, arm and/or cartridge, all very painful thoughts. :-(

Madfloyd, I dont think those choices will solve the problem. It's a phenomenon we all deal with when it comes to vinyl. Oh, I think the title of your thread is hilarious btw. lol

Agree with Vandermeulen and others. Don't change your table, tonearm or cartridge. There's almost no chance that would reduce woofer pumping.

I find Kevin's suggestion regarding damping fluid rather odd. Perhaps it would help on one of his tonearms, I don't know them, but it wouldn't on a TriPlanar, at least IME.

Did you experience less woofer pumping when you had the Doshi preamp in your system (if you remember)? Compared to our c-j, the Alaap reduced WP a lot. Nick doesn't include a rumble filter per se, but his circuit is designed to roll off around 16 Hz or so IIRC, which helps.