RCF SUB 708-AS MK3 18-inch 1,400-watt Active Subwoofer

RCF SUB 708-AS MK3 active 18-inch subwoofer

RCF SUB 708-AS MK3 active subwoofer is engineered for professional live sound reinforcement where extremely deep, powerful, and controlled bass output is required. It features a 1400W peak Class-D amplifier designed to deliver high sound pressure levels with efficiency, low distortion, and excellent transient response, making it suitable for DJs, bands, and portable PA systems in small to mid-sized venues.

The system uses a high-performance 18-inch woofer housed in a bass reflex cabinet, optimized for extended low-frequency reproduction and maximum air displacement. With a peak output of up to 133 dB SPL, it delivers strong, impactful bass performance that enhances any full-range system, especially when paired with 8-inch or 10-inch loudspeakers.

Advanced DSP processing includes electronic equalization, soft limiting, polarity reversal, and selectable crossover frequencies, allowing precise tuning for different sound environments and system configurations. Bass Motion Control technology improves woofer excursion management, ensuring deep bass extension while maintaining stability, clarity, and low distortion even at high output levels.

The rear control panel provides flexible system configuration through stereo XLR inputs and outputs, along with volume control, EQ adjustment, phase switching, and crossover selection for seamless integration into professional audio setups.

The cabinet is constructed from rugged Baltic birch plywood with a scratch-resistant polyurea coating for maximum durability in touring conditions. Ergonomic side handles ensure easy transport, while the M20 threaded pole mount allows secure installation of satellite speakers. Front-firing bass reflex ports improve efficiency and allow flexible placement, even in tight or recessed environments.

SUB 708-AS MK3 delivers powerful, controlled, and extended low-frequency performance, making it an ideal choice for professional sound systems requiring maximum impact and reliability.

Features of SUB 708-AS MK3

• 1400W high-efficiency Class-D amplifier
• Maximum SPL up to 133 dB for extreme bass output
• 18-inch high-power woofer for deep low-frequency extension
• Bass reflex cabinet design for enhanced output efficiency
• Deep, powerful, and controlled bass reproduction
• Stereo crossover system with selectable frequencies
• Adjustable crossover settings for system tuning
• Polarity reverse switch for phase alignment
• Bass Motion Control for optimized woofer excursion
• Electronic equalization with soft limiter protection
• Stereo XLR input and output connectivity
• Rugged Baltic birch plywood cabinet construction
• Scratch-resistant polyurea protective coating
• Ergonomic side handles for easy transport
• M20 threaded pole mount for satellite support
• Front-firing bass reflex ports for flexible placement

Specifications of SUB 708-AS MK3