JBL Cinema 4642A 4 ohm, Dual 18" Bass Reflex Subwoofer System. Components: Two 2241H Installed in Dual 18" Enclosure, 1200 watts. Approved by Lucasfilm, Ltd., for THX® System Installations.

JBL Cinema 4642A – Dual 18" Bass Reflex Subwoofer System (4 Ohm)

Product Description
The JBL Cinema 4642A is a professional-grade dual 18-inch bass reflex subwoofer system designed for cinema, theater, and high-output sound reinforcement applications. It features two JBL 2241H low-frequency transducers mounted in a direct-radiating bass-reflex enclosure, delivering powerful, deep bass with exceptional efficiency and high sound pressure levels. Engineered for demanding installations, the 4642A provides extended low-frequency performance, low distortion, and reliable operation in large venues. The system is approved by Lucasfilm Ltd. for THX® installations, making it a trusted choice for professional cinema environments.

Features

• Dual 18-inch (460 mm) JBL 2241H low-frequency drivers
• Bass-reflex enclosure design for extended low-frequency output
• 4-ohm nominal impedance
• 1200 watts continuous power handling
• 2400 watts program power handling
• Usable frequency response down to 22 Hz (-10 dB, no EQ)
• Flat response to 22 Hz (-3 dB) with external equalization
• VGC™ (Vented Gap Cooling) technology for improved thermal performance
• High sensitivity and high maximum SPL capability
• Low power compression for consistent output at high levels
• Long-excursion driver design for powerful low-frequency reproduction
• SFG™ (Symmetrical Field Geometry) magnet structure for reduced distortion
• Low second- and third-harmonic distortion characteristics
• Recommended crossover frequency: 80 Hz – 150 Hz