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Woofers getting workout, but no bass

I'm puzzled: I'm noticing just about every LP I've played in the past couple days has my 10" woofers moving like mad, but not in time with the music and regardless of whether there's any audible bass.

I can only conclude that I have subsonic frequencies occuring (my phono stage doesn't have a filter). What would cause this?

Relevant components:
Speakers: Wilson Sophia 2's
Turtable: TW Acustic Raven One
Phono stage: Tron Seven

Thanks in advance.
madfloyd

Showing 2 responses by atmasphere

atmasphere's avatar
atmasphere
12,138 posts
 
You might play with the way your counterbalance is set up. The Triplanar has a multiple weight system and you can use that to affect the effective mass of the arm and cartridge.

If the effective mass is off, the setup might be susceptible to warp and the like. I have the same arm and cartridge, with no problems and no rumble filter.

We have the large weight and one of the smaller ones (about 3/8" thick) set fairly close together to get our tracking pressure. The amps and preamp have bandwidth to 2Hz no problem, but no problem with woofer pumping either, even with some pretty warped records.
atmasphere's avatar
atmasphere
12,138 posts
 
...this problem seems to be inherent in analog playback...

There would be quite a few who would disagree, including myself. However this is IMO/IME a pitfall of improper setup!
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