Q-SYS PL-LA Series, User Manual, Page: 31 / 37

31
Three-Box Cardioid Systems
A three-box array, with two forward-facing subwoofers and one rear-facing subwoofer, gives additional acoustic output to the front.
Figure 32 (1) shows a stacked three-box array. Use the bottom subwoofer as the rear-facing one when ground stacking, and at the top
when flown.
Figure 32 (2) shows a back-to-back three-box array.
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Figure 32
Cable Management and Fake Grille
For applications where cosmetic appeal is important, you can install another grille on the back of the rear facing PL-SUB18. In that
case the Rear Panel Connection won't be accessible anymore and it will be necessary to route the Input cable thru the port to the input
cup connector as shown below. A small opening will have to be made into the front grille to allow the cable to get into the PL-SUB18
loudspeaker. It is recommended to attach the cable on the inside wall of the port, and then securing it to one of the columns holding
the PCB.
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Figure 33