RCF S 8018 II | 18in Subwoofer - 137 dB SPL | Deep Bass for Installed Sound Systems

Passive Installation Subwoofer

RCF S 8018 II is a high-efficiency 18" subwoofer engineered to extend low-frequency performance in permanent sound installations. Designed for durability and acoustic power, it delivers deep bass response down to 30 Hz and exceptional SPL in a rugged, installation-ready enclosure.

RCF S 8018 II Competitive Differences

• 6000W peak power handling with 137 dB max SPL
• 18" woofer with 4" inside/outside voice coil for reduced power compression

RCF S 8018 II Description

The RCF S 8018 II brings powerful low-end reinforcement to large-scale installed systems, offering unmatched efficiency and long-term durability. At its core is an 18" neodymium transducer with a 4" voice coil, designed with inside/outside winding for improved thermal stability and reduced power compression—key for demanding venues.

This passive subwoofer uses a bass reflex design optimized for extended low-frequency reproduction, achieving an impressive 30 Hz–200 Hz range. With a peak SPL of 137 dB and sensitivity rated at 100 dB, the S 8018 II excels in environments that require impactful, controlled bass.

The cabinet is built from rugged Baltic birch plywood and finished in a black, heavy-duty textured epoxy coating for professional installations. It includes a 35mm M20 pole socket, integrated side handles, and Speakon® connectors on a recessed panel. The metal grille protects the driver while maintaining clean aesthetics for venues such as clubs, theaters, houses of worship, and event halls.

Model Features

• 18" neodymium woofer with 4" inside/outside voice coil
• 6000W peak / 1500W continuous power handling
• Frequency response down to 30 Hz
• Bass reflex cabinet design for high efficiency
• Durable Baltic birch enclosure with black textured epoxy paint
• Integrated M20 pole mount and carry handles

Model Specifications

• Max SPL: 137 dB
• Power Handling: 1500W RMS / 6000W Peak
• Frequency Response: 30 Hz – 200 Hz (-10 dB)
• Sensitivity: 100 dB
• Nominal Impedance: 8 ohms
• Woofer: 18" neo with 4.0" voice coil
• Dimensions: 25.16 x 20.87 x 30.31 in (639 x 530 x 770 mm)
• Weight: 94.8 lb (43 kg)

What's In The Box

• RCF S 8018 II Subwoofer
• User manual