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 3 responses by audiotomb

Wow, this two year old thread is what I am experiencing right now

I also have woofer pumping to a great degree

Triplaner arm, zyx cartridge

I have records which don't appear warped but have slight air gaps between the record and the platter as the table spins (coupling issues?)

I also have a Doshi preamp which rolls off at a very low freq. There is the option to change out the capacitors on the phono pre although Nick feels it affects slightly higher freqencies.

Mine isn't positioning - passed the placed the needle on the non spinning record test.

Placed a nickel on the headshell and couldn't tame arm / cartridge resonance.

May try a TT periphery clap, but not sure it would fit in between my platter and triplaner. Also the risk of breaking a Universe may be too much to try.

My Salk Soundscape 10s go down to 22 hz at 1.5 dB down. Is there really usable music down there outside of Saint Saens Organ Symphony #3 ( not HT )?

Seems to be robbing a bit of my amp power left for musical dynamics

The cartridge and arm are known to work very well together.
Starting to lean towards rolling the doshi off higher.
Any other suggestions?
I think doing a capacitor change in the phono stage to roll off the lowest freq would accomplish what the KAB would do without all the extra hardware and interconnects.

Why did manufactures get away from subsonic filters?

purity of corrupted sound