Woofers getting workout, but no bass

One thing you might try is to put a gram or two of something like blu-tack on your headshell and a corresponding amount on the counterweight so that your VTF remains the same.

This will change the effective mass of your arm and the resonate frequency of the arm cartridge.

It may or may not work but it is cheap and simple to try.

Regards,
Todd

Here's more background info on cartridge compliance, resonance frequency, and potential impact for rumble, etc.

http://www.gcaudio.com/resources/howtos/tonearmcartridge.html

Hope this helps.

Madfloyd,

I am considering buying a TTweights peripheral ring, so I would greatly appreciate your feedback on whether it reduced/eliminates the woofer pumping and also you perception on its effect on sound quality.

Although the woofer pumping generates frequencies that are (mostly) too low to hear directly (unless the woofers are bottoming out), it does load your room with low frequency pressure that will affect the sound (ala REL sub, but in an uncontrolled way).

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.