Wharfedale WLA-28SUB, 2 x 15-Inches Passive Flying Subwoofer

The Wharfedale WLA-28SUB is a powerful dual 15-inch passive subwoofer designed to deliver deep, impactful bass in professional audio systems. Built to complement the WLA-28X line array, the WLA-28SUB enhances low-frequency performance, making it ideal for large-scale live events, installations, and touring applications. Its dual high-efficiency 15-inch drivers provide precise and powerful bass response, ensuring an immersive audio experience. The robust birch plywood cabinet is built for durability, while its compact design ensures easy transport and integration into various setups. With its exceptional performance and rugged construction, the WLA-28SUB is a reliable choice for delivering outstanding low-end reinforcement in any professional sound system.

Dual 8"

At the heart of the WLA-28X are 2 x 8″ custom Wharfedale Pro LF drivers. These feature 2.0″ voice coils to ensure high efficiency and high-power handling. These custom designed transducers are what give a WLA-28X system its incredible sound and power handling capacity.

Optional Fly Frames

Arrays can be assembled using only WLA-28X line array elements or with WLA-15B / WLA-28SUB Subwoofers at the top of the array. The WLA-28X Common Fly frame supports up to 450 kg. That's 12 x WLA-28X elements and a WLA-28SUB.

Just Imagine

Imagine your dream system!  You can configure a WLA series rig to suit your needs! To help your design and system preparations, you can download some recommended system diagrams. These range from small to large and use a selection of our different amplifier ranges.
Optimised Ground Stacking

WLA-28X rigging doubles up as an optimised ground stacking system, using the WLA-15B or WLA-28SUB subwoofer as a base. Arrays of WLA-28X line array elements can be aimed downwards by as much as 10° to cover audience areas close to a stage, as well as upward by as much as 10° in order to better cover distant balcony seating areas.

Bi-Amp & Passive

In BI-AMP mode, two power amplifiers can be used. This gives you the advantage of being able to select the best power amplifier specifications for each driver inside the loudspeaker. In a BI-AMP configuration, an external crossover is used to separate the frequencies and this splits the signal to the dedicated LF amplifier and the HF amplifier. This way, each amplifier is only working on the given frequency range and, in turn, is powering the corresponding driver inside the loudspeaker.

In PASSIVE mode, a single amplifier can be used to power all drivers inside the loudspeaker. The full frequency range is put into the loudspeaker and the loudspeakers’ internal crossover separates the frequencies, delivering the right frequencies to the right driver. In the example of a 2-way passive loudspeaker, this means that the single amplifier is powering both the HF compression driver and the LF transducer. The internal crossover takes care of both the frequency and power separation.

AMPS & DSP

A Versa drive DSP (such as SC-48 FIR) or a DP-N or DP-F series amplifier with internal FIR filtering is highly recommended to get the most from the system.  Phase, EQ and filtering should be applied and this way, the physics of the system can be truly optimised – delivering that sub-bass, power and clarity that this system can deliver

Product Specifications:

System Type: Passive

Configuration: 2 x 15″ subwoofer

Frequency Response (+/-3 dB): 39 Hz – 900 Hz

Frequency Range (-10 dB): 39 Hz – 1.5 KHz

Sensitivity (2.83 V / 1 m): 108 dB

Calculated Maximum SPL @ 1 m: 145 dB

System Rated Impedance: 4 Ω

Low-Frequency Transducer:

Size: 2 x 381 mm / 15″

Voice Coil Size: 100 mm / 4″

Rated Impedance: 2 x 8 Ω

LF Power (re: AES2-2012): 2 x 600 W

Power:

System Continuous Power: 1200 W

System Programme Power: 2400 W

System Peak Power: 4800 W

Crossover Frequency: No

Input Connector:

Type: 2 x SpeakON compatible

Hardware:

Rigging: Integral side plate, non-adjustable

Enclosure:

Material: 15 mm, 18 mm Plywood

Finish: Black Paint

Grille Material & Finish: 1.2 mm Black Steel

Product Weight: 61.2 kg / 134.6 lbs.

Product Dimensions: 28 x 30 x 19

Shipping Weight: 66.0 kg / 145.2 lbs.

Shipping Dimensions: 32 x 23 x 34