WLA-121SUB 21" Touring & Installation Subwoofer for Powerful Low-Frequency Output

The WLA-121SUB is a 21" passive subwoofer designed to deliver extreme low-frequency power with precise control for large-scale touring and installation environments. Built as part of the WLA-1 System, it provides tight, impactful bass that stays articulate even at high output levels.

At the core is a 21" Beyma low-frequency driver with a 4.0" Quattro LF voice coil, engineered for stability and thermal efficiency under demanding conditions. With up to 141 dB max SPL (half space) and deep extension down to 18 Hz (-10 dB), the WLA-121SUB is built to anchor a commanding full-range system in venues where low-end authority matters.

Key Features

• 21" Beyma Driver With 4.0" Voice Coil: Delivers immense output with stability and thermal efficiency for demanding touring and fixed-install use.
• High Power Handling: Rated at 1600 W continuous, 3200 W programme, and up to 6400 W peak for impactful low-frequency performance.
• Deep, Controlled Low End: Frequency range down to 18 Hz (-10 dB) with a focused response for tight, articulate bass.
• Flexible Deployment Options: Designed for flown configurations or ground-stacked setups alongside WLA-1 full-range elements.
• Tour-Ready Cabinet Construction: Birch plywood enclosure with a powder-coated perforated steel grille and black Tough-Tone finish.
• Rigging-Ready Design: Integral rigging with 3 points plus M20 pole mount support for adaptable system builds.

Technical Specifications

• Active or Passive: Passive
• System Type: Subwoofer
• Configuration: Bass-reflex
• System Continuous Power: 1600 W
• System Programme Power: 3200 W
• System Peak Power: 6400 W
• Max SPL @ 1 m: 141 dB (Half Space)
• Frequency Range (-10 dB): 18 Hz – 125 Hz
• Frequency Response (+/-3 dB): 25 Hz – 100 Hz
• Sensitivity (2.83 V / 1 m): 103 dB
• System Rated Impedance: 4 Ω
• Driver Brand: Beyma
• LF Driver Size: 21"
• LF Magnet Material: Ferrite
• LF Frame Material: Aluminium
• LF Voice Coil Size: 4"
• Preset: Yes
• Crossover Frequency: Preset Dependent
• Recommended HPF: 20 Hz (BW 18 dB/OCT.)
• Input Connector: 2 x 4 Pole Speaker Connector
• Cabinet Type: Rectangle
• Enclosure Material: Birch Plywood
• Grille Material & Finish: Powder Coated Perforated Steel
• Finish: Black Tough-Tone
• Handles: 2 side (4 pcs) + 2 (top/bottom)
• Deployment: Flying, Ground
• Rigging: Yes
• Integral Rigging: 3 Points
• Pole Mount: M20
• Unpacked Dimensions (H x W x D): 32.28 x 22.28 x 29.92 in
• Packed Dimensions (H x W x D): 35.24 x 25.83 x 33.46 in
• IP Certification: None

What's Included

• User Manual: Included accessory documentation for setup and operation