Wharfedale Pro WLA-121SUBA 21″ Active Subwoofer – 2500W Class-D

The Wharfedale Pro WLA-121SUBA is a high-output 21″ active subwoofer engineered for large-scale sound reinforcement systems, concerts, and touring applications. Delivering an incredible 2500W of Class-D power, it provides deep, powerful, and controlled low-frequency reproduction that perfectly complements Wharfedale’s WLA line array systems. Built from birch plywood with Rhino Rock paint finish, the WLA-121SUBA combines exceptional durability with modern DSP control, efficient cooling, and easy rigging and stacking options — making it a powerhouse for professionals demanding extreme low-end performance and reliability.

Key Features:

• 21″ active subwoofer with built-in Class-D amplifier
• Continuous Power: 2500 W RMS
• Frequency response: 30 Hz – 150 Hz
• Max SPL: 141 dB
• LF driver: 21″ Wharfedale custom woofer with 5″ voice coil
• High-efficiency Class-D amplifier with integrated DSP
• DSP features: Crossover, EQ, delay, limiter, and phase control
• Balanced XLR inputs and link outputs for flexible connectivity
• Switchable polarity and adjustable crossover frequency
• Rugged 18 mm birch plywood cabinet with Rhino Rock textured paint finish
• Ergonomic handles and stacking cups for secure ground stacking
• Reinforced steel grille for maximum protection
• Optimized to pair with Wharfedale WLA-1A / WLA-28A / WLA-210A arrays
• Rear-panel cooling and protection circuits for safe operation

Specifications:

• Configuration: Active subwoofer
• Driver: 21″ LF driver with 5″ voice coil
• Amplifier Type: Class-D
• Power Output (RMS): 2500 W
• Frequency Response: 30 Hz – 150 Hz
• Max SPL: 141 dB
• Input Connectors: 2 × XLR/TRS combo (balanced)
• Output Connectors: 2 × XLR link outputs
• DSP Functions: EQ, crossover, delay, polarity, limiter
• Enclosure Material: 18 mm birch plywood
• Finish: Black Rhino Rock textured paint
• Mounting: Ground-stack / integrated rigging cups