Crown VRACK Operation Manual page 34

Output Wiring Modes
2-Way + Sub Mode
2x 3-WAY + 2x 3-WAY
4x 3-WAY + 2x SUB
4x 3-WAY + 4x 2-WAY
6-12 x SUB
18x HF; 18x MF; 18x LF
6-12 x 2-WAY
8x 2-WAY + 6x SUB
24x PASSIVE (1-way)
16x PASSIVE + 4x SUB
12x PASSIVE + 6x SUB
Operation Manual
page 34