JBL MTC-81BB8 Pre-install Deep Backcan For 8138
Description
JBL MTC-81BB8 Pre-Install Deep Backcan For 8138
The MTC-81BB8 is a robust pre-install deep backcan engineered for professional ceiling speaker installations where structural support and cable management are critical. This steel construction housing delivers the durability and precision fit required in commercial and architectural audio applications, making it an essential component for installers working with compatible JBL ceiling speaker systems.
Installation & Mounting
Designed for seamless integration with ceiling speakers featuring a 286 mm (11.25 in) mounting circle diameter, the unit secures via four M4 clip-nut attachment points for stable, code-compliant mounting. Two flexible perforated suspension tabs on each side distribute load evenly and accommodate standard installation techniques without requiring custom bracing.
Design & Construction
Built from 16 gauge (1.3 mm thick) steel with a black polymer E-coating finish, this backcan resists corrosion and maintains structural integrity in demanding environments. The compact footprint—300 mm x 300 mm x 178 mm (11.75" x 11.75" x 7")—provides a 7.4 liter internal volume for wire routing while fitting within standard ceiling cavity constraints.
Key Features
- Compatible with ceiling speakers on 286 mm (11.25 in) mounting circle
- Internal volume: 7.4 liters (0.26 cubic feet)
- Dimensions: 178 mm H x 300 mm W x 300 mm D (7" x 11.75" x 11.75")
- 16 gauge steel construction with black polymer E-coat finish
- Five conduit knockouts: 22 mm (0.87 in) diameter—four on side, one on top
- Two flexible perforated suspension tabs for load distribution
- Four M4 clip-nuts on standard mounting circle
- Net weight: 1.1 kg (2.5 lbs)
The MTC-81BB8 delivers the structural support and wire management infrastructure installers and system designers depend on for reliable, long-term ceiling speaker deployments in venues and permanent installations.
More Information
| Condition | New |
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At a Glance
The JBL MTC-81BB8 is a heavy-duty steel backcan for recessed ceiling speaker installations, designed to support JBL 8138 speakers and compatible models with robust structural mounting and cable management. Built from 16-gauge steel with corrosion-resistant coating, it handles the demands of permanent venue, commercial, and live-sound installations where reliability matters. Install crews and venue technicians choose it for code-compliant mounting, tool-free suspension tabs, and the peace of mind that comes with a pro-grade support structure.
Who This Is For
Great for
- ✓ Live Performance
- ✓ Studio Sessions
- ✓ Commercial Installation
Skill level: Professional
Frequently Asked Questions
What ceiling speakers is the MTC-81BB8 compatible with?
The MTC-81BB8 is designed for ceiling speakers with a 286 mm (11.25 inch) mounting circle diameter, including the JBL 8138 and other compatible JBL models that use that footprint. It secures via four M4 clip-nut attachment points on the standard mounting circle.
What is included in the box?
The MTC-81BB8 is the backcan housing itself—a steel mounting and support structure. It comes with four M4 clip-nuts and two flexible perforated suspension tabs for load distribution and easy installation.
What are the internal dimensions and cable capacity?
The backcan measures 178 mm tall x 300 mm wide x 300 mm deep (7 x 11.75 x 11.75 inches) with an internal volume of 7.4 liters. It includes five 22 mm diameter conduit knockouts—four on the sides and one on top—to route speaker and signal cables.
Is this backcan durable for permanent installations?
Yes. The MTC-81BB8 is built from 16-gauge (1.3 mm) steel with a black polymer E-coat finish that resists corrosion and maintains structural integrity in demanding commercial, architectural, and venue environments over the long term.
How much does it weigh, and will it need special bracing?
The backcan weighs 1.1 kg (2.5 lbs) and is designed to fit within standard ceiling cavities. The two flexible perforated suspension tabs distribute load evenly and accommodate standard installation techniques without requiring custom bracing.