Wharfedale DELTA-AX15B 15" Active Sub 900w
Powerful, precise, and road-ready. Experience low-end performance redefined. Overview
The Delta-AX15B packs serious punch in a compact, tour-grade birch plywood cabinet. A high-efficiency Class-D amplifier drives a custom 15″ LF transducer to deliver tight, musical bass that stays controlled at high SPLs. With flexible filtering, phase control and balanced I/O, it integrates seamlessly with full-range loudspeakers for live sound, installs, houses of worship and mobile DJs. Key Features
- Serious power on tap: 900 W continuous (1,800 W peak) Class-D amplification for deep, controlled low-end.
- Big sound, small footprint: Up to 130 dB SPL at 1 m with a tuned 15″ driver for punch and definition.
- Flexible system control: Adjustable low-pass filter, 180° phase switch, and Hi-Pass link output for easy crossover matching.
- Quiet reliability: Fanless, convection-cooled design removes mechanical noise and moving-part failures.
- Tour-ready build: 15 mm Baltic birch, Rhino Rock finish, full cloth grille, and ergonomic rubberized handles.
- Protected performance: Clip limiting, power-on mute, thermal and DC/short protection ensure consistent results night after night. Connections & Controls
- Inputs: Balanced TRS jack and XLR (line level, up to 22 dBu).
- Outputs: Balanced XLR Thru and High-Pass (for linking to tops or additional subs).
- Controls: Level, adjustable Low-Pass Filter, 180° Phase, and Power/Limit indicators. Why You’ll Love It
- Deep, clean bass that enhances kick, toms, synths and bass guitar without getting boomy.
- Easy integration with your current PA thanks to onboard filtering and link outputs.
- Built to last for the rigors of touring and frequent load-ins/outs. Specifications:
Amplifier: Class-D, 900 W continuous / 1,800 W peak
Max SPL: Up to 130 dB @ 1 m
Frequency Response: 42 Hz – 200 Hz (±3 dB)
LF Driver: 15″ woofer, 4″ voice coil, 8 Ω
Inputs: Balanced TRS & XLR (line level)
Outputs: Balanced XLR Thru & High-Pass
Controls: Level, LPF, 180° Phase, Status LEDs
Protection: Clip limiter, power-on mute, thermal, DC/short
Enclosure: 15 mm Baltic birch, Rhino Rock finish, full cloth grille
Handles: 4-way rubberized
Cooling: Passive (fanless)
Dimensions: (H × W × D) 471 × 471 × 600 mm
Weight: 33.1 kg (net); 36.7 kg (packed)