Wharfedale Pro WLA-121SUBA Active Hybrid Curvature Subwoofer - 21-Inches SKU# WD-WLA-121SUBA

The WLA-121SUBA is a 21″ active subwoofer from our WLA-1A System, built to deliver extreme low-frequency power with precision and control for large-scale touring and installation environments.

Powered by internal Class-D amplification and DSP, and, at its core, a 21″ Beyma driver with a 4.0″ Quattro voice coil delivers immense output with exceptional stability and efficiency.

Handling 2200 W continuous (up to 4400 W peak) and delivering a maximum SPL of 136 dB @ 1 m, WLA-121SUBA produces tight, controlled low-end that stays articulate even at the highest levels. Designed for flexibility, it can be flown or ground-stacked alongside WLA-1A full-range elements — forming the foundation of a truly commanding system.

• Active with DSP
• 21″ Beyma driver
• 2200 W Continuous
• 4400 W Peak
• 4.0″ Quattro LF voice coil (4 layers)
• 147 dB System Peak SPL

Competitive traditional constant curvature two way systems do not have consistent coverage in one axis at least by design.

With a traditional 2-way array….arrays of 6 elements or more are simply not practical.

With the WLA-1 Hybrid Curvature design, arrays of up to 6 elements can be configured.

EVO-Fold reduces the usual phase issues that traditional 2-way line arrays have due to them having the drive units physically some distance apart in the array. One specially-designed coaxial mid-high frequency driver is loaded to a unique EVO-Fold horn. The EVO-Fold horn combines a unique folded and manifold design. The most advanced FEM technology has been used to create this.

The high-mid energy exits produce a uniphasic sound in the widest range of frequencies. And visually, the detail of the EVO-Fold waveguide is a work of art.

The 21″ subwoofer driver is manufactured by Beyma in Europe.

Extreme features… for extreme (and controllable) sub sound pressure levels.

Configure vertically and deploy as a ‘traditional’ flying array.

The optional WLA-1 Common Fly Frame ensures stability and that flying is easy.

The optional SP-4 pole easily connects the 21″ sub to the tops.  Dual angle 35 mm pole sockets in the full range elements makes angle adjustments safe and easy.

The optional WLA-1 Link hardware connects three elements of either WLA-112A or WLA-115A to create a 3 unit horizontal array with 60 H x 100 V dispersion 

WLA-1A Series have gll files available for EASE FOCUS 3.

When interconnecting WLA series active line array elements, quality, certified power cabling should be used.


Wharfedale Pro distributors also can supply Neutrik ™ powerCON cables as an accessory for sale.



These certified AC interconnecting cables use genuine Neutrik ™ NAC3FCA and NAC3FCB connectors for the ultimate in reliability and safety.


2 meters in length allows for system configuration flexibility while keeping excess cabling to a minimum.

A tidy solution for any Wharfedale Pro Active Line Array.

WLA-1A introduces a new Hybrid concept giving variable angles of 0, 5, 10 and 15 degrees.

Easily adjusted using the integral rigging brackets.

• Active or Passive: Active
• System Type: Subwoofer
• Configuration: Bass-reflex
• System Continuous Power: 2200 W
• System Peak Power: 4400 W
• Max SPL @ 1m: 136 dB (Half Space)
• Freq Range (-10 dB:) 18 Hz – 125 Hz
• Freq Response (+/-3 dB): 25 Hz – 100 Hz
• Bi-amp Mode Switch: No
• Bluetooth: No
• IP Certification: None
• Driver Brand: Beyma
• LF Driver Size: 21"
• LF Magnet Material: Ferrite
• LF Frame Material: Aluminium
• LF Voice Coil Size: 4"
• Preset Library: No
• Input Connector: Balanced Socket XLR
• Cabinet Type: Rectangle
• Enclosure Material: Birch Plywood
• Grille Material and Finish: Powder Coated Perforated Steel
• Finish Black Tough-Tone
• Handles: 2 side (4 pcs) + 2 (top/bottom)
• Deployment: Flying, Ground
• Pole Mount: M20
• Rigging: Yes
• Integral Rigging: 3 Points
• Sensitivity 2.83v / 1m: 103 dB
• Crossover Frequency: Preset Dependent
• Amplifier design: Class D
• Driver Protection: RMS, Peak Limiters and DC
• Thermal Protection: Amplifier Shut Down. Auto Reset
• DC and Short Protection: Yes
• Clip Limiter: Yes
• Signal Processing: DSP Based, 8 FIR Presets
• Low Line Voltage Shut Down: 60% Nominal Line Voltage
• DC and Short Protection: Yes
• Limiter Indicator: Red LED
• Signal Indicator: Green LED
• Power/Active Indicator: White LED
• Find Function Indicator: Blue LED
• Active loudspeaker Input Impedance: Balanced: 10 KΩ
• Link Connector: Balanced Socket XLR
• Input sensitivity: +4 dBu
• Max input level: +18 dBu
• Update: USB Type B
• Network (RS485): RJ45
• Main Power: AC 100-120 V~ and 220-240 V~, 50/60 Hz Automatic
• Power Supply: High Efficiency Dual Switching Mode Power Supply
• Included Accessory: User Manual

• Front Height mm: 820 mm / 32.28"
• Rear Height mm: 820 mm / 32.28"
• Width (Front): 566 mm / 22.28"
• Width (Back): 566 mm / 22.28"
• Depth: 760 mm / 29.92"

• Height: 895 mm / 35.24"
• Width (Front): 656 mm / 25.82"
• Width (Back): 656 mm / 25.82"
• Depth: 850 mm / 33.46"

• Net Weight): 74 Kg / 163.14 lbs
• Gross Weight: 80 Kg / 176.37 lbs