The manual says that negative voltage in the "frq/ph/div" CV input will allow an extended frequency range up to 53 minutes, but doesnt specify if all the LFO`s will react to this lowering of frequency, while mantaining the "90 degrees out of phase" relation of the QUAD mode . Maybe only LFO 1´s rate changes.

Phase and frequency in quad mode are preserved for the 4 lfo in slow speed mode.