Product Description
This is an OPEN BOX Model
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
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1400W peak Class-D amplifier
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18" woofer in bass-reflex enclosure
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Maximum SPL: up to 133 dB
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Stereo XLR input and stereo XLR signal output
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Stereo crossover with switchable frequencies
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Selectable crossover presets: 80 Hz / 120 Hz
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Polarity reverse switch
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Electronic EQ, soft limiter, and protection circuits
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Bass Motion Control excursion management
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Fan-free convection cooling for silent operation
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M20 threaded pole mount for top speaker support
Specifications
Acoustical
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Transducer: 18" woofer
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Maximum SPL: 133 dB
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Enclosure Type: Bass reflex, front-ported
Amplifier
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Amplifier Type: Class-D
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Power Output:
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Peak: 1400 W
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Cooling: Convection (fanless)
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Power Supply: Switch Mode Power Supply (SMPS)
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Safety Standard: EN 62368-1 compliant
DSP & Controls
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Crossover Presets: 80 Hz / 120 Hz
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Polarity: Normal / Reverse
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Output Signal Modes: Line / High-Pass
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Protections: Thermal, RMS, soft limiter
Connections
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Inputs: Stereo XLR
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Outputs: Stereo XLR
Cabinet & Physical
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Cabinet Material: All-plywood
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Finish: Scratch-resistant polyurea coating
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Grille: Powder-coated metal with acoustically transparent foam
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Handles: Ergonomic rubber-grip handles
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Pole Mount: M20 threaded mount
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Application: Portable PA, live sound, DJs, small to mid-sized venues
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