I should also add, that a phono riaa preamp is useless without a subsonic filter! A subsonic filter is mandatory, regardless of which turntable/tonearm/cartridge you use.
The necessity of a subsonic filter really depends on a host of interactive variables including: your turntable, clamping, rack, floor, speaker ported vs. sealed, arm / cart, and how loud you play. If you have a setup that doesn’t generate anything near overload levels, nor discernible woofer flapping, then why incur the extra circuitry and artifacts of a filter?
RIAA IEC added a mild (6dB / octave) filter at 20Hz but it’s rarely made clear which phono stages implement this. It’s also not strong enough to solve major issues on its own. The KAB rumble filter is much more effective than this, but ideally you’d solve the root issue through mechanical optimizations.
As smooth and friction free as the Clearaudio CMB bearing is, it can also be a subsonic / woofer flapping generator because of its vertical compliance. If you don’t completely structurally isolate these tables, a subsonic filter is needed to save your poor woofers.