JBL MTC-PC3 Instructions
(MTC-PC2 shown)
(MTC-PC2 shown)
MTC-PC2 & MTC-PC3
WEATHER RESISTANCE PANEL COVERS
for Control Contractor, Control, & CBT Series
The MTC-PC2 and MTC-PC3 are simple-to-use protective Panel Covers for the input terminal panel of
many models of Control Contractor and Control Series loudspeakers. On MTC-PC2, the wire exits from
the rear of the cover, and on MTC-PC3, the wire exits from the side of the cover.
The Panel Cover installs over the existi ng input cup, provides a watertight gla nd-fitting entrance to seal and
protect this section of the loudspeaker against incursion of water. The cover comes only in black. The
cover section is paintable, but the gland nut is not.
IMPORTANT: In order to seal correctly, the cable must be jacketed externally with a round (or nearround) cross-sectional shape and the outside diameter of the cable MUST be between 0.170 inches (4.3
mm) and 0.470 inches (11.9 mm). Side-by-side “zip” type cables are not acceptable.
Installatio n Instructions
Step 1 – Remove the existing four (4) screws in the corners of the speaker’s existi ng terminal cup.
DISCARD these four (4) screws.
Step 2 – Loosen the nut on the outside of the Panel Cover’s gl and nut. Run wire t hrough the gland
fitting, as shown. Do NOT tighten the nut on the outside of the Panel Cover yet .
Note: If you are using the gland fitting at t he smaller end of its size range, it is highly
recommend ed that you tighten and loosen the nut a few times using a wrench, to
make it less stiff. Do NOT remove the rubber insert – it is needed for accomplishing
a liquid-tight seal.
Step 3 – Connect wire to input te rminals of the loudspeaker.
MTCPC2-3 INSTR
JBL Professional
Northridge, CA 91329 U.S.A.
(MTC-PC2 shown)
(MTC-PC2 shown)
Step 4 – Remove the protective liner over the ad hesive gas ket surrounding the u nderside of the Panel
Cover. Attach the Panel Cover through the existing screw holes, USING THE NEW SCREWS
PROVIDED WITH THE PANEL COVER. It might be necessary, depending on the stiffness of the
cable, to slide the cable through the gland fitting to avoid strain on the wire or connections inside the
Panel Cover.
Note: The new screws provided with the MTC-PC2 are longer than the screws previously removed
in Step 1. Use the new screws. DO NOT reuse the screws previously re moved in Ste p 1.
Step 5 – Tighten the nut on the gland fitting to seal around the cable to a recommended torque of
80 in/ lbs. The fitting is specified to be liquid-tight for round cables and many near-round cables.
If the fitting does not achieve a tight seal on a particular cable type, it might be necessary to use a
different, rounder, cable type or to reinforce the seal with sealant (in which case the success of the
seal is the responsibility of the instal ler).
The Panel Covers are intended solely to provide protection for the input connections
of the loudspeaker. Do NOT suspend the loudspeaker by the Panel Cover fitting.
Model Compatibility – MTC-PC2 and MTC-PC3 fit JBL’s standard 1.7” x 1.7” (43 x 43 mm) input cup
which includes the following models (at the time of this writing):
Control 23-1, 25-1, 28-1, SB2210, 25AV, 29AV, 30, 31, 1, 5. CBT 70J-1, 70JE-1, 200LA-1, 100LA-1,
50LA-1. Plus older models Control 23, 23T, 25, 25T, 28, 28T-60.
The MTC-PC2 & MTC-PC3 do NOT fit the older model Control SB210 which came with the
slightly larger MTC-PC4 cover.
Caution:
8500 Balboa Blvd, P.O. Box 2200
03/2016
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