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Rigging
Two types of rigging hardware are available to fly the MSL-
4 loudspeaker system: Aircraft pan fittings and the optional
L-Track system. Both are installed and tested exclusively at
Meyer Sound Laboratories.
Aircraft Pan Fittings Only
The MSL-4 without L-Track weighs 184 lb (83.5 kg). The
maximum recommended load for an MSL-4 with aircraft pan
fittings is 600 lb (273 kg). This working load is based on a 5:
1 safety factor. The MSL-4 has six rigging brackets (three on
top and bottom of the cabinet); each bracket is capable of sup-
porting the full working load of the cabinet.
rigging brackets
three on top, three on bottom
Handles are for carrying only.
Do not use them for rigging!
!
The MSL-4 with Optional L-Track Rigging Sys-
tem
There are four types of interchangeable rigging brackets, each
fastened by six Phillips screws:
• aircraft pan fittings (ring and stud)
•
3
/8”-16 nut plates
• M-10 x 1.5 metric nut plates
• blank plates (if no rigging brackets are requested)
NOTE: Units with nut plates are rated for the weight of one
cabinet only.
Rigging load ratings assume a straight tensile pull and that the
cabinet is in new condition with aircraft pan fittings. If these
conditions are not met, the load ratings can be reduced sig-
nificantly. Load ratings can also be reduced by age, wear, and
damage. It is important to inspect the rigging hardware regularly
and replace worn or damaged components immediately.
The cabinet, exposed electronic circuitry, and drivers can receive
protective treatment that permits safe use in wet conditions.
Additionally, a rain hood can be fitted to shield cables and
electronics. Do not install a unit outdoors without weather
protection! Contact Meyer Sound for more information.