Wharfedale Pro WLA-15B BK Passive Monitor 15-Inches SKU# WD-WLA-15B-BK

The WLA-15B is the dedicated subwoofer engineered for the WLA-28 line array speaker. Reaching depths of 35Hz and with an output potential of 2800 Watts peak its a perfect match for the WLA-28. The low end response applies itself to the most demanding music genres with the same long- throw capabilities of its smaller counterpart.  The WLA-15B is a compact yet high-powered subwoofer from our WLA-28X System, delivering deep, impactful low-end performance for touring and installation applications.

Equipped with a custom 15″ LF driver featuring a robust 4.0″ voice coil, WLA-15B delivers 700 W AES (up to 2800 W peak) power handling with a maximum SPL of 133 dB at 1 m. Its wide 35 Hz – 1.3 kHz response ensures tight, musical bass projection ideal for medium to large array configurations.

Constructed from 15 mm / 18 mm birch plywood, WLA-15B combines durability with acoustic integrity, ensuring long-term reliability under demanding conditions. An integrated rigging system allows it to be flown with WLA-28X line array elements or used as a ground stack foundation when paired with the WLA-28 Common Fly Frame.

With an 8 Ω impedance and versatile deployment options, WLA-15B is a powerful, flexible low-frequency solution designed to integrate seamlessly into WLA-28X systems.

Also available is the WLA-28 Fly Frame, which ensures a highly secure mount for the top line array speaker or subwoofer. Between each speaker users can securely tether additional line-arrays via locking pins which are certified to hold multiple arrays safely and securely.

As with all Wharfedale Pro PA systems, years of expertise is behind a loudspeaker built to last, with thanks to our high standards of quality control. Both the WLA-15B and WLA-28 are coated in the high quality Rhino Rock paint finish – a texture with a professional, discrete aesthetic whilst being prepared for the rigours of life on the road.

• 700W RMS / 1400W Programme / 2800W Peak
• 35Hz 900Hz Frequency Response
• 133dB Max SPL
• 15 high powered woofer
• 8 Impedance
• Designed specifically for WLA-28
• 2 x Parallel Speakon Inputs
• Rhino Rock textured black paint finish
• Plywood construction
• Steel grille
• Ultra-secure locking pins
• New WLA-28 fly frame available
• Fly up to 8 x WLA-28 & 1 x WLA-15B

• Active or Passive: Passive
• System Type: Subwoofer
• Configuration: Bass-reflex
• System Continuous Power: 700 W
• System Programme Power: 1400 W
• System Peak Power: 2800 W
• Max SPL @ 1m: 133 dB (Half Space)
• Freq Range (-10 dB): 35 Hz – 1.3 kHz
• Freq Response (+/-3 dB:) 40 Hz – 1.5 kHz
• Bi-amp Mode Switch: No
• Bluetooth: No
• IP Certification: None
• Driver Brand: Wharfedale Pro
• LF Driver Size: 15"
• LF Magnet Material: Ferrite
• LF Frame Material: Aluminium
• LF Voice Coil Size: 4"
• LF Rated Impedance: 8 Ω
• LF Power (RE:AES2-2012): 700 W
• Preset Library: No
• Input Connector: 2 x 4 Pole Speaker Connector
• Enclosure Material: Birch Plywood
• Grille Material and Finish: Steel Black
• Finish: Black Tough-Tone
• Handles: 2
• Deployment: Flying, Ground
• Pole Mount: None
• Brackets Included: Yes
• Rigging: Yes
• Integral Rigging: 3 Points
• Sensitivity 2.83v / 1m: 99 dB
• System Rated Impedance: 8 Ω
• Crossover Frequency: Preset Dependent
• Recommended HPF = BW 18 dB/OCT.: 35 Hz
• Transformer (T): No
• Included Accessory: User Manual