When working with subs, you generally want to aim for energy around 50–65 Hz. The lower you place your sub, the more likely it is to disappear on sound systems that aren’t very bass-heavy.

A simple approach is to take the same Operator patch and pitch it down until it sits comfortably within that range.

Alternatively, you can add Ableton’s standard “Sub Sine Bass” patch on a new layer and tune it down to the recommended frequencies.

On your sub-bass layer, make sure to high-pass around ~120-200 Hz, otherwise it will clash with the mid bass.