Optimal Mid-high Loudspeaker to Subwoofer Ratio

The ideal ratio of mid-high loudspeakers to 750-LFC loudspeakers depends on the following:
Loudspeaker model
System configuration
Frequency content of source material
Headroom required for low frequencies
For LINA applications, the ratios shown in the first, second, and third figures below yield good results.
For ULTRA-X40 applications, the ratio shown in the last image below yields good results.

Flown Mixed Array (ratio 3:1)
Caution
Make sure that all cables for looped loudspeakers are wired correctly (Pin 1 to Pin 1, Pin 2 to Pin 2, etc.) to prevent the polarity from being reversed. If one or more loudspeakers in a system have reversed polarity, frequency response and coverage will be significantly degraded.

Flown Separate Arrays (ratio 8:3)

Mixed Groundstack (ratio 2:1)

ULTRA-X40 pole-mounted on 750-LFC (ratio 1:1)
Note
Native mode should not be used with more advanced configurations, such as those where LINA and 750-LFC loudspeakers are not coplanar, or those requiring delay offsets to align subsystems or to create directional low-frequency control. These systems require additional processing.
For Native mode to work properly, the source signal must be correctly configured with the appropriate gain structure.