Product Description
The RCF SUB 708-AS MK3 is a high-power, portable 18" active subwoofer engineered for professional live sound applications requiring deep, controlled bass with maximum reliability. Powered by a 1400W peak Class-D amplifier, this subwoofer delivers sound pressure levels up to 133 dB, offering exceptional headroom and punch for small to mid-sized venues, mobile DJs, bands, and production companies.
Designed as the perfect low-frequency companion for 8" and 10" full-range loudspeakers, the SUB 708-AS MK3 features a state-of-the-art transducer with a high-power ceramic magnetic circuit housed in a bass-reflex enclosure for powerful and accurate low-end reproduction. Rear-panel DSP controls allow precise system tuning, including selectable crossover frequencies, polarity reversal, and EQ control.
The rugged all-plywood cabinet is finished with a scratch-resistant polyurea coating, making it road-ready for touring and frequent transport. Ergonomic handles with rubber grips, an M20 threaded pole mount, and a compact footprint ensure fast setup and easy integration into any sound system. With its advanced protection circuitry, energy-efficient fanless cooling design, and superior sonic performance, the SUB 708-AS MK3 is a reliable low-frequency solution for demanding professionals.
Features
-
1400W peak Class-D amplifier
-
18" woofer in bass-reflex enclosure
-
Maximum SPL: up to 133 dB
-
Stereo XLR input and stereo XLR signal output
-
Stereo crossover with switchable frequencies
-
Selectable crossover presets: 80 Hz / 120 Hz
-
Polarity reverse switch
-
Electronic EQ, soft limiter, and protection circuits
-
Bass Motion Control excursion management
-
Fan-free convection cooling for silent operation
-
M20 threaded pole mount for top speaker support
Specifications
Acoustical
-
Transducer: 18" woofer
-
Maximum SPL: 133 dB
-
Enclosure Type: Bass reflex, front-ported
Amplifier
-
Amplifier Type: Class-D
-
Power Output:
-
Peak: 1400 W
-
-
Cooling: Convection (fanless)
-
Power Supply: Switch Mode Power Supply (SMPS)
-
Safety Standard: EN 62368-1 compliant
DSP & Controls
-
Crossover Presets: 80 Hz / 120 Hz
-
Polarity: Normal / Reverse
-
Output Signal Modes: Line / High-Pass
-
Protections: Thermal, RMS, soft limiter
Connections
-
Inputs: Stereo XLR
-
Outputs: Stereo XLR
Cabinet & Physical
-
Cabinet Material: All-plywood
-
Finish: Scratch-resistant polyurea coating
-
Grille: Powder-coated metal with acoustically transparent foam
-
Handles: Ergonomic rubber-grip handles
-
Pole Mount: M20 threaded mount
-
Application: Portable PA, live sound, DJs, small to mid-sized venues
Search Terms: rcf sub 708-as mk3, rcf subwoofer, rcf 18 inch subwoofer, rcf active subwoofer, rcf powered sub, rcf bass speaker, rcf live sound subwoofer, rcf sub 708 as, rcf sub 7 series, rcf pa subwoofer, rcf professional audio
