JBL CSS BB4X6 4" Rear Cabinet for CSS8004 Speaker (6 Pack)

JBL Professional CSS-BB4x6 - 4" Back Enclosure for CSS8004 (6-Pack, Plenum, Zinc-Plated Steel 1.4L)

The JBL Professional CSS-BB4x6 is the pre-installed backcan enclosure for the CSS8004 in-ceiling loudspeaker. It provides the required air volume ( 1.4 liters ) and plenum protection required by commercial installations, ensuring predictable performance and regulatory compliance. Manufactured from powder-coated zinc-plated steel , it features 5 knockouts for conduit entry and a 4-point Ø 165 mm fixing pattern that fits directly onto the loudspeaker. For suspended ceilings, it is complemented by CSS-TR4/8 rails . Supplied in a pack of 6 to equip six speaker points.

Main features

• Compatibility : Specifically designed for the JBL CSS8004 in-ceiling speaker; use with CSS-TR4/8 tracks in suspended ceilings.
• Internal volume : 1.4 L (0.05 ft³) for coherent low frequency response.
• Dimensions : 89 mm deep × 214 mm diameter.
• Bolt pattern : 4-point on Ø 165 mm circle with clip-nuts.
• Construction : Zinc plated steel with powder coating , high durability.
• Conduit entries : 5 knockouts (4 lateral at 90° and 1 on the top cover).
• Includes : 4 M4 × 8 mm screws to fix two CSS-TR4/8 rails to each backcan.
• Weight per unit : 0.38 kg (shipping: 0.47 kg per unit).
• Safety : Suitable for use in air handling (plenum) spaces when installed with the appropriate listed speaker; conforms to UL1480, UL2043, NFPA 90/70; C-UL; IEC/EN 60849.

Product benefits

• Regulatory compliance for plenum installations and demanding commercial environments.
• Consistent acoustic performance thanks to controlled air volume (1.4 L).
• Quick and clean installation : standard 4-bolt pattern and knockouts in convenient positions.
• Professional Grade Durability : Zinc plated steel and powder coat finish for mechanical and corrosion resistance.
• Logistical efficiency : CSS-BB4x6 format (6 units) for projects with multiple speaker points.

Installation and compatibility

• Suspended ceiling : use two CSS-TR4/8 rails per backcan to distribute the load and meet plenum requirements.
• Speaker fixing : screw the CSS8004 to the backcan using the 4 points at Ø 165 mm .
• Conduit : Select the appropriate knockout (4 sides/1 top) and seal according to local regulations.

Frequently Asked Questions

• Does it work with other models? This backcan is designed for the CSS8004 . For 8" speakers, use the CSS-BB8x6 .
• Does it include roof rails? No. CSS-TR4/8 are purchased separately (12-piece pack for 6 back cans).
• Is it suitable for plenum box installations? Yes, when installed in conjunction with the corresponding listed loudspeaker and in accordance with the specified regulations.

Description for projects

JBL CSS-BB4x6 backcan (6-pack) for CSS8004 speaker: dimensions 89 × 214 mm (depth × diameter); volume 1.4 L ; bolt pattern 4× on Ø 165 mm with clip-nuts; material zinc-plated steel with powder coating; 5 knockouts (4 side + 1 top); plenum rated (UL1480/UL2043/NFPA 90/70; C-UL; IEC/EN 60849); weight 0.38 kg per unit; includes 4 M4 × 8 mm screws for mounting two CSS-TR4/8 rails per backcan.