JBL CSS BB8X6 8" Back Enclosure for the CSS8008 or CSS8018 Speaker

JBL Professional CSS-BB8x6 - 8" Back Cover for CSS8008/CSS8018 (Pack of 6)

The JBL Professional CSS-BB8x6 is the pre-installation back enclosure for the CSS8008 and CSS8018 in-ceiling loudspeakers. Designed for a safe, secure, and acoustically predictable installation, it provides the proper airflow behind the loudspeaker and protects the plenum box. Its zinc-plated and powder-coated steel construction ensures durability, while 5 integrated knockouts facilitate conduit routing from any orientation. For suspended ceilings, it is complemented by CSS-TR4/8 track mounting . It is supplied in a pack of 6 to equip six speaker points.

Main features

• Compatibility : CSS8008 / CSS8018 speakers and CSS-TR4/8 tile rails (suspended ceiling).
• Dimensions : 108 mm deep × 334 mm diameter; bolt circle 286 mm (4 points with clip-nuts).
• Internal Volume : 4.0 L for consistent and controlled bass performance.
• Material : zinc-plated steel and powder coating for mechanical and corrosion resistance.
• Conduit entries : 5 knockouts (4 lateral at 90° and 1 on the top cover).
• Weight (unit) : 0.87 kg ; Shipping weight : 1.04 kg (unit).
• Compliances : Plenum rated (UL1480, UL2043; NFPA 90/70) when installed with the appropriate UL listed speaker; conforms to IEC/EN 60849 .
• Included accessories : 4 M4 × 8 mm screws for fixing two CSS-TR4/8 rails to the backcan.
• Sales format : CSS-BB8x6 (pack of 6 backcans).

Product benefits

• Regulatory and safe installation : prepared for air handling spaces (plenum) with the appropriate listed speaker.
• Predictable Performance : 4.0 L volume stabilizes low frequency response and intelligibility.
• Quick and clean : 4-bolt pattern Ø 286 mm and knockouts in standard positions for tidy wiring.
• Professional Durability : Zinc plated and powder coated steel for long life in commercial installations.

Installation and compatibility

• Suspended Ceiling : Use with CSS-TR4/8 (tile rails) to distribute load and meet plenum.
• Speaker mounting : 4 points in a 286 mm circle (clip-nuts included in the backcan); screws onto the CSS8008/8018 speaker.
• Conduit : 4 side knockouts and 1 top knockout allow conduit entries from any direction.
• Good practices : Seal conduits/cable glands according to local regulations; maintain the internal volume without obstructions.

Description for projects

JBL CSS-BB8x6 Ready Back Box (6-Pack): Compatible with CSS8008/CSS8018 ; Use with CSS-TR4/8 in suspended ceiling; Depth 108 mm , Diameter 334 mm ; Bolt Circle 286 mm (4 points with clip-nuts); Volume 4.0 L ; Zinc-plated steel with powder coating; 5 knockouts (4 side + 1 top); Weight per unit 0.87 kg (Shipping 1.04 kg); Plenum rated (UL1480, UL2043; NFPA 90/70) with listed speaker; Includes 4 M4 × 8 mm screws for securing two CSS-TR4/8.