The SUB 18-AX is a professional 18″ active subwoofer designed for high-output live sound environments. Delivering up to 135 dB SPL through a powerful 2200W Class-D amplifier, it ensures exceptional headroom and low-end performance. Featuring advanced DSP with an 8-band parametric EQ, delay settings, cardioid configuration, and recallable presets, it allows for complete system control through its onboard touchscreen or via the RCF LiveRemote app over Bluetooth®. Its rugged all-wood cabinet, coated in durable polyurea, makes it ideal for mobile setups in small to mid-sized venues. Built-in crossover outputs allow seamless integration with 10″, 12″, or 15″ tops, while Powercon TRUE1 TOP connectors and ergonomic handles ensure road-ready reliability.
Features
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2200 Watt Class-D amplifier
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135 dB max SPL
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18” woofer in bass reflex housing
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Digital crossover with presets
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8-band parametric EQ with delay and cardioid configuration
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2.4-inch color touchscreen with rotary encoder
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Bluetooth® control via LiveRemote app
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Dual XLR/TRS combo inputs, XLR Link, and XLR Xover outputs
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Powercon TRUE1 TOP AC connector
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Multi-ply hardwood cabinet with polyurea coating
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M20 pole mount and ergonomic side handles
Specifications
Frequency Response | 35 Hz – 120 Hz |
Max SPL @ 1m | 135 dB |
Woofer | 1 x 18″, 4.0″ voice coil |
Input Signal | Balanced/Unbalanced |
Input Connectors | Combo XLR/Jack |
Output Connectors | XLR |
Input Sensitivity | -2 dBu / +4 dBu |
Protections | Thermal |
Limiter | Soft Limiter |
Controls | Volume encoder, touchscreen monitor |
Total Power | 2200 W Peak, 1100 W RMS |
Cooling | Convection |
Power Connections | Powercon TRUE1 TOP IN/OUT |
Cabinet Material | Plywood |
Handles | 1 handle per side |
Pole Mount | M20 thread |
Grille | Steel |
Color Options | Black, White |
Height | 693 mm / 27.28 in |
Width | 505 mm / 19.88 in |
Depth | 685 mm / 26.97 in |
Weight | 43.8 kg / 96.56 lbs |
Package Height | 735 mm / 28.94 in |
Package Width | 745 mm / 29.33 in |
Package Depth | 565 mm / 22.24 in |
Package Weight | 49.5 kg / 109.13 lbs |
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