JBL MTC-300BB8 Datasheet
1 Cubic Foot Backcan
for Control 300 Series
MTC-300BB8
Professional Series
Key Features:
䉴
Extra-thick 16 gauge metal
construction.
䉴
Lined with 12 mm (½ inch) thick
MDF to eliminate resonances and
to provide extra bass response.
䉴
Knockouts on top and side.
Dimensions:
15.0
Ø
(380)
12.0
Ø
(305)
10.7
Ø
(273)
11. 3
(286)
8 inch Drivers
Specifications:
External Volume: 1 cu ft, nominal
Internal Volume: .71 cu ft.
Knockouts: 22.1 mm (0.87 in) diameter opening
Dimensions (Height): 259 mm (10.2 in) above ceiling
(Outside Diameter): 380 mm (15.0 in)
(Inside Diameter): 273 mm (10.7 in)
(Ceiling Cut Out): 310 mm (12.2 in)
Safety Agency Rating: Suitable for use in air handling spaces, per
Net Weight: 5.2 kg (11.5 lbs)
Shipping Weight: 7.9 kg (16.5 lbs)
Included Accessories: 4 pcs #10 x 0.75 inch metal screws for mounting
JBL continually engages in research related to product improvement. Changes introduced into existing products without
notice are an expression of that philosophy.
Five (5) locations: 1 on top panel
4 on side of can
268 mm (10.6 in) total height
U.L.-2043, U.L.-1480, NFPA90 & NFPA70A
baffle to backcan
10.6
(268)
ns in inches (mm)
10.2
(259)
12.0
(305)
15.0
(380)
Dimensions in inches (mm)
䉴 Control 300 / MTC-300BB8 Backbox Assembly
1.) Cut a 12.2 inch (310 mm) diameter hole in the
ceiling to allow sufficient room for the loudspeaker
baffle.
2.) After inserting the Control 328C/CT into the
back can, align the mouting holes without
nuts to the holes with clip nuts on the back can.
These are the mounting points that will be used to secure
the Control 328 baffle and driver to the backcan.
Non-Weld nut
mount point
Weld nut
mount point
weld
IMPORTANT!
See “Securing Loudspeaker
Assembly to the Building
Structure.”
4 pcs - #10 x .75 in sheet metal screw for
attaching the baffle / driver to the back
can. Match to clip nuts on back can.
(Included with MTC-300BB8.)
3.) Using 4 pcs - #10 x .75 in sheet metal screw, attaching
the baffle / driver to the back can. Be sure to match the
mouting holes without weld nuts to clip nuts on back can.
4 pcs - M4 x 38 mm powder coated machine
screws for attaching the metal grille to the
4.) Using 4 pcs - M4 x 38 mm powder coated machine
baffle. (Included with MTC-300RG8.)
screws, attach the metal grille to the baffle. Be sure to
match the grille mouting holes to the weld nuts on the
baffle assembly.
IMPORTANT: SECURING THE LOUDSPEAKER ASSEMBLY TO THE BUILDING STRUCTURE
The backcan MUST be secured to the building structure by qualified personnel in accordance with safe installation
practices. Use suspension materials, connection fixturing, and methods that are appropriate for the building structure and installation conditions. Employ a minimum 5:1 safety factor for each suspension point, or higher if required
by code. For MTC-300BB8 with a Control 328C/CT, a 5:1 safety factor requires that each suspension point be rated
to support a minimum of 57 kg (125 lbs).
JBL Professional
8500 Balboa Boulevard, P.O. Box 2200
Northridge, California 91329 U.S.A.
A Harman International Company
©Copyright 2007 JBL Professional
SS MTC300BB8
CRP 5M
07/07
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