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M-F3A UB
The M-F3A UB U-bracket allows to install one or two M-F3A or M-F3A PRO pieces on any
SE AUDIOTECHNIK® subwoofer with M20 thread, using the SPS20 pole mount.
Under no circumstances should you use the M-F3A U-bracket to hang line array systems!
In addition, no more than two M-F3A or M-F3A PRO units should be stacked on top of it.
To prepare the units and accessories before install the setup:
1. Prepare the power and audio cables required for the installation.
2. Adjust the same "LEVEL" and "LINE UNITS" on each of the M-F3A or M-F3A PRO units.
3. Using the screws of the SPS20 pole mount, set its length to the minimum. Seal them again
before proceeding.
To install the system:
1. Locate the subwoofer in the desired place. Ensure that the four bottom feet touch the ground and its
position is stable.
2. Screw the SPS20 pole mount in the M20 thread of the subwoofer.
3. Place the receptacle of the M-F3A UB bracket in the SPS20 pole mount. Fasten it tight with the screw.
4. Position the first M-F3A or M-F3A PRO unit over the U-bracket. Lock the two lower front rigging points
of the box with the security pins of the U-bracket.
5. Unfold the moving part in the back of the box and set the aiming angle with the holes in the U-bracket.
Use the security pin of the u-bracket to lock it.
6. Repeat steps 4 and 5 to install a second M-F3A or M-F3A PRO unit on top of the first one if desired.
7. Lock the security pins in the front of the last unit added to the stack.
8. Loosen the screws in the SPS20 pole mount and lift the top units until the desired height. Seal again
the screws in the pole to lock the position.
9. Connect properly the power and audio cables and turn the units ON.
To unmount the system, follow the previous steps in reverse order respecting all the safety instructions
mentioned before.
Figure 9.
Installation of small arrays with the SPS20 pole mount and the M-F3A UB U-bracket.
M-F3A S12 PRO SFI AND M-F3A S15 PRO SFI
With these dedicated frames, it is possible to stack up to 4 M-F3A or M-F3A PRO units over a S12 PRO or
S15 PRO subwoofer, or on the ground.
M-F3A S12 PRO SFi or M-F3A S15 PRO SFi stacking frames are not designed for hanging loads.
Under no circumstances should you use them to hang line array systems! In addition, no more
than four M-F3A or M-F3A PRO units should be stacked on top of it.
Before installing the system:
1. Prepare the power and audio cables required for the installation.
2. Depending on the number of boxes in the array, set the same "LINE UNITS" on each of the M-F3A
or M-F3A PRO units to use.
3. Set the "LEVEL" control to the same position on all the boxes, and turn their power switch to the
ON position.
To set an array over one S12 PRO or S15 PRO subwoofer:
1. Locate the subwoofer in the desired place. Ensure that the four bottom feet touch the ground and
its position is stable.
2. Fix the M-F3A S12 PRO SFi or M-F3A S15 PRO SFi stacking frame to the subwoofer using the
locking points located at both sides, as shown in figures 7 and 10.
3. Follow the steps described below for a ground-stacked array.
Figure 10.
Subwoofer ground stack with M-F3A S12 PRO SFi and M-F3A S15 PRO SFi frames.
M-F3A PRO
M-F3A UB
SPS 20
S12 PRO
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