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Sub Sonics and woofer pumping

I have a VPI prime on bear claws sitting on a maple base. Floor is concrete. I use a Nagaoka MP500 cart with going to an ARC PH3se phono pre, then to a Herron 1A preamp. Amp is an ARC Classic 60. Speakers are Thiel CS 2.4’s. 
I get pretty aggressive woofer pumping with vinyl. 
I’ve lubed my bearings on the table.

my alignment is spot on. 
Tracking force at the upper limits of cart. 
I’ve added the 2nd pivot point to the 3D arm. 
I’ve even switched out the counter wt to a much heavier unit and added a comparable head shell weight to change the total mass of arm. To no avail. 
None of these things have had any effect in reducing the pumping. 
I REALLY don’t want to use a rumble filter. 
I’m left with the conclusion that the cart may not be a match for the arm, even after adding all the extra mass. 

Any thoughts or solutions. 
last_lemming
last_lemming OP
639 posts
 
I changed out my counter wt from 140 gr to 180 and I added a head shell wt, can’t remember the weight but it was about the size of a dime and about as thick as a nickel. 
No change to the woofer pumping. 
I do have the Soundsmith weights, but they are too short to use on the cart. 
erik_squires
16,892 posts
 
Does the pumping happen with the needle still up??
mijostyn's avatar
mijostyn
8,570 posts
 
Last_lemming are the woofers pumping at normal listening levels or just when you turn it up?
The Nagaoka is very stiff and we really do not know where you are.
It would help if you could get the Hi Fi News Test LP. Then we can know for sure. It also is a lot of fun to test other parameters. Very Useful.
Here,  https://www.amazon.com/Tonearm-Headshell-Cartridge-Weights-turntables/dp/B01B8ONJVI and  https://www.amazon.com/Ultimate-Analogue-Test-Lp/dp/B001GBA71Y/ref=asc_df_B001GBA71Y/?tag=hyprod-20&linkCode=df0&hvadid=312149562874&hvpos=&hvnetw=g&hvrand=501746434509243117&h
mijostyn's avatar
mijostyn
8,570 posts
 
Woops Wrong test LP. This one  https://www.amazon.com/HIFI-NEWS-Test-Producers-Cut/dp/B00KMCL1PE
jjss49's avatar
jjss49
6,612 posts
 
another option is get a phono stage with an effective subsonic filter - higher lehmanns have that feature for example

but other advice is spot on... best to find the source of rumble, but it may be coming from the TT/cart itself coupled with records
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