help identifying bass solutions with system

Sounds like you are experiencing acoustic feedback. Are your woofers pumping?

You may need to relocate your turntable to a better location. You want to keep it away from the speakers and the corners of your room. If that does not work you could try putting it on a wall shelf.

Another way to deal with it is to purchase a rumble filter which basically filters the bass below 20 hz.

I recommend trying all other options before using a rumble filter beacause they can degrade the sound a little.

Sean

Or at least try some different vibration damping for whatever platform the turntable is on.

Moving my Linn to the recommended (interestingly) "light but stable" lowish table worked for me...also I absolutely need the 20hz rumble filter that comes with my Cambridge 640P phono preamp or it's a woofer pumpfest.

When I read "low bass" i thought the OP might mean thin bass rather than a low bass rumble?