RCF Sub 708-AS MK3 18-Inch 1400-Watt Active Subwoofer

Professional Power House - The RCF Sub 708-AS MK3 18-Inch 1400-Watt Active Subwoofer

The SUB 708-AS mk3 is a portable 18" high-power active subwoofer for live sound applications. It features a state-of-the-art transducer with a high-power ceramic magnetic circuit and a powerful Class-D amplifier that delivers sound pressure levels up to 133 dB with exceptional headroom. Designed as the ideal complement for 8" or 10" loudspeakers, it provides outstanding performance in any application. Rear panel controls include volume, EQ, polarity, and crossover frequency selection. The rugged all-wood cabinet with scratch-resistant polyurea coating makes it durable, easy to carry and install securely. With its versatility, sound quality, and high power output, the SUB 708-AS MK3 is perfect for small to mid-sized venues and portable applications.

• 1400 Watt Class-D Amplifier
• 18” Woofer, bass reflex housing
• Stereo Crossover
• Switchable Crossover Frequencies
• Polarity-reverse switch
• Electronic equalization, soft limiter and protection
• Stereo XLR input, Stereo XLR signal output
• Bass Motion Control excursion management

SPECIFICATIONS

• Powered/Unpowered: Powered
• LF Driver Size: 18" subwoofer
• Power Rating: 700W RMS
• Total Power: 1400W Class D
• Inputs: 1 x XLR
• Outputs: 1 x XLR
• Frequency Response: 40Hz-120Hz
• Maximum Peak SPL: 133 dB SPL @ 1m
• Mounting Options: Floor, Pole
• Power Source: Standard IEC AC cable
• Enclosure Material: Baltic birch plywood
• Height: 28.94"
• Width: 22.24"
• Depth: 26.97"
• Weight: 88.18 lbs

We are Musictoner Musictoner

Since 1958, Chuck Levin’s Musictoner has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.

Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.

Chuck Levin’s isn’t just a store—it’s a community built by players, engineers, and creators who share a lifelong passion for sound. Stop by our legendary Wheaton, MD showroom or contact us anytime for expert advice, product questions, or the best possible deal on your next piece of gear.