Woofers Gone Wild

Davidsss, my suggestion is the same for you; if you can, try a cartridge that has a lower compliance figure. That will reduce the woofer 'wobble' and actually improve the bass at the same time.

whatever you do, contrary to what some people might say, though not on this thread yet, it can damage your speakers. I blew out a woofer on an Aerial 10T twice because of infrasonic info being passed to my speakers. Mike Kelly had to chastise me to use the rumble filter on the pre I had at the time

I understand the sentiment of the purist approach to this problem, but I wonder how many of the purists actually used the filter and can offer meaningful advice. Saying it filters ergo it wrongs the signal is, in my opinion, a simplistic theoretical approach that does little to shed any light on its actual real life effect. I've been using the filter for a few months now and don't look back. I have no doubt that the woofer fluttering caused more deterioration to the sound that removing frequencies from the signal that can't even be heard. And warps often have little to do with the fluttering; the worse woofer pumping I noticed happened with a perfectly flat 200 gr record. And yes, my cartridge/tonearm matching is spot on.

Actusreus, I'll put it to you this way- the phono preamp I use is good to 2Hz and the amp is good to 1 Hz. I have 2 15" woofers in each channel, and they go to 20Hz. They really don't move much unless there is a bass drum whack or the like. The trick was simply to get the relationship right between the arm and the cartridge.

If you install a rumble filter, you add phase shift components that rob the signal of impact, as a 20Hz cutoff will have audible artifacts up to 200Hz- lower midrange! That's why keeping filters out is so important if you can do it.

Ralph, just curious: are your speakers a sealed design or are they ported?