Why do my bass drivers shake violently listening to vinyl

It is always 10" or below and always with turntables. With many amps going clear down to DC surface irregularities in the vinyl will cause the woofers to flap.

@mijostyn Back in the old days I used to run some Fried G2s which had a 10" IIRC and had no woofer issues. But you are correct- smaller drivers will flop about without much provocation.

It is the nature of the vinyl format to have this rumble.

This statement is misleading. The LP itself should be quite free of rumble.

I purchased the KAB rumble filter.

@audionoobie It sounds to me as if you have a mismatch between the arm and cartridge.

My woofers at home are 15" and the speakers are flat to 20Hz. I never have problems with the woofers flopping about. But I am careful to make sure the cartridge isn’t too compliant for the mass of the arm. If it is, as the cartridge negotiates the minor ups and downs of the LP surface, the mass of the arm will take more time to catch up with the cartridge. This causes a lot of low frequency output from the cartridge and its stuff that isn’t on the LP surface.

You can either reduce the mass of the tonearm or decrease the compliance of the cartridge. The former might be done by replacing hardware holding the cartridge in place (or going with a lighter cartridge); the latter is done by replacing the cartridge.

If you have the cartridge/arm combo right, your electronics can have bandwidth down to 1 or 2Hz and you’ll have no troubles with your woofers.

The introduction of the rumble filter will have an audible consequence (depending on how well your speakers play bass); by introducing phase shift, there will be a loss of bass impact. Its better if you can get the arm/cartridge combo correct.