Wharfedale Pro WLA-121SUBA | 21in - 136dB | Active Flyable Subwoofer

Active Flyable Subwoofer

Wharfedale Pro WLA-121SUBA is a 21-inch active hybrid curvature array subwoofer designed for high-output, controlled low-frequency performance in large-scale touring and installation systems. With integrated Class D amplification, DSP processing, and rigging hardware, it delivers flexible deployment for flown or ground-stacked configurations.

Wharfedale Pro WLA-121SUBA Competitive Differences

• 21-inch Beyma driver with 4-inch Quattro voice coil for powerful low-frequency output
• 2200W continuous and 4400W peak Class D amplification
• DSP processing with 8 FIR presets for system integration
• 136dB maximum SPL for high-impact bass performance
• Integrated 3-point rigging for flown or ground deployment

Wharfedale Pro WLA-121SUBA Description

The Wharfedale Pro WLA-121SUBA is engineered to provide the low-frequency foundation for WLA-1A array systems. Its custom 21-inch Beyma ferrite driver with a 4-inch Quattro voice coil delivers deep, powerful bass with excellent stability and efficiency.

Built-in Class D amplification provides 2200W continuous power and 4400W peak output, while integrated DSP with FIR presets ensures optimized system alignment and performance. Advanced protection systems—including RMS, peak limiting, DC, short circuit, and thermal protection—help maintain reliability in demanding environments.

The enclosure is constructed from durable birch plywood and finished in black Tough-Tone coating, with a powder-coated perforated steel grille for protection. Integrated rigging supports flown arrays, while the cabinet design also allows for ground stacking and M20 pole mounting for flexible deployment.

WLA-121SUBA Features

• 21-inch active hybrid curvature array flyable subwoofer
• Built-in Class D amplifier
• 2200W continuous and 4400W peak power output
• 136dB maximum SPL at 1m (half space)
• Custom Beyma 21-inch ferrite driver
• 4-inch Quattro LF voice coil
• DSP-based processing with 8 FIR presets
• Bass-reflex enclosure design
• Integrated 3-point rigging system
• Supports flying and ground-stacked deployment
• M20 pole mount for system expansion
• Balanced XLR input and link connectors
• USB Type B update port and RJ45 RS485 networking
• Comprehensive protection: RMS, peak limiter, DC, short, and thermal

WLA-121SUBA Specifications

• Active or Passive: Active
• System Type: Subwoofer
• Configuration: Bass-reflex
• System Continuous Power: 2200W
• System Peak Power: 4400W
• Max SPL: 136dB at 1m (half space)
• Frequency Response: 25 Hz - 100 Hz (+/-3 dB)
• Frequency Range: 18 Hz - 125 Hz (-10 dB)
• Driver Brand: Beyma
• LF Driver Size: 21 in
• LF Magnet Material: Ferrite
• LF Frame Material: Aluminum
• LF Voice Coil Size: 4 in
• Input Connector: Balanced XLR socket
• Link Connector: Balanced XLR socket
• Cabinet Type: Rectangle
• Enclosure Material: Birch plywood
• Grille: Powder-coated perforated steel
• Finish: Black Tough-Tone
• Handles: 2 side (4 pcs) + 2 (top/bottom)
• Deployment: Flying, ground
• Pole Mount: M20
• Rigging: Integrated 3-point rigging
• Sensitivity: 103dB (2.83V / 1m)
• Crossover Frequency: Preset dependent
• Amplifier Design: Class D
• Signal Processing: DSP based, 8 FIR presets
• Driver Protection: RMS, peak limiters, and DC
• Thermal Protection: Amplifier shutdown with auto reset
• DC and Short Protection: Yes
• Clip Limiter: Yes
• Limiter Indicator: Red LED
• Signal Indicator: Green LED
• Power Indicator: White LED
• Find Indicator: Blue LED
• Input Impedance: 10 kΩ balanced
• Input Sensitivity: +4 dBu
• Max Input Level: +18 dBu
• Update Port: USB Type B
• Network: RJ45 RS485
• Main Power: AC 100-120V / 220-240V, 50/60 Hz auto
• Power Supply: Dual switching mode power supply
• Dimensions: 32.3 x 22.3 x 29.9 in (820 x 566 x 760 mm)
• Weight: 163.1 lb (74 kg)

What's In The Box

• Wharfedale Pro WLA-121SUBA subwoofer
• WLA-RH1 rain hood
• User manual