Delta-AX15B is a commanding 15-inch active subwoofer engineered for pro PA systems demanding deep, powerful bass.
With a high-efficiency Class-D amplifier delivering 900 W continuous and 1800 W peak, it manages to reach up to 130 dB SPL at 1 metre, ensuring plenty of headroom for even the most intense live environments. Its frequency response spans 42 Hz to 200 Hz (±3 dB), offering a solid low-end foundation without muddying the mix. Integrated controls include a low-pass filter, 180° phase switch, and high-pass link output, allowing seamless integration with full-range speakers. The 15-inch driver sports a heavy-duty 4-inch LF voice coil, for durability and thermal stability under extended use. Encased in rugged 15 mm birch plywood with a Tough-Tone finish, it features four recessed, rubberised handles for road-ready transport. Comprehensive protection circuits (clip limiter, thermal, DC/short) ensure reliability in demanding touring or fixed-install scenarios.
| Active or Passive | Active |
| System Type | Subwoofer |
| Configuration | Bass-reflex |
| System Continuous Power | 900 W |
| System Peak Power | 1800 W |
| Max SPL @ 1m | 130 dB (Half Space) |
| Freq Range (-10 dB) | 35 Hz - 200 Hz |
| Freq Response (+/-3 dB) | 42 Hz - 200 Hz |
| IP Certification | None |
| Driver Brand | Wharfedale Pro |
| LF Driver Size | 15" |
| LF Voice Coil Size | 4" |
| LF Rated Impedance | 8 Ω |
| Input Connector | TRS Jack and Socket XLR |
| Enclosure Material | Birch Plywood |
| Grille Material and Finish | Steel Black |
| Finish | Black Tough-Tone |
| Handles | 2 |
| Deployment | Ground |
| Pole Mount | 35 mm |
| Sensitivity 2.83v / 1m | n/a dB |
| System Rated Impedance | n/a |
| Crossover Frequency | 80 Hz - 200 Hz (Adjustable) |
| Recommended HPF = BW 18 dB/OCT. | 35 Hz |
| Amplifier design | Class D |
| EQ Type | None |
| Active loudspeaker Input Impedance | Balanced: 20K Ω / Unbalanced: 10K Ω |
| Link Connector | 2 x pin XLR |
| Input sensitivity | Line: 0 dBu |
| Max input level | 22 dBu |
| Line output | Pin XLR |
| Main Power | AC100-120 V~ / 220-240 V~,50/60 HZ |
| Power Supply | High Efficiency SMPS |
| Included Accessory | User Manual, AC Cable |
| Unpacked - Height (mm) | 471 |
| Unpacked - Width Front (mm) | 471 |
| Unpacked - Width Rear (mm) | 471 |
| Unpacked - Depth (mm) | 600 |
| Packed - Height (mm) | 556 |
| Packed - Width Front (mm) | 672 |
| Packed - Width Rear (mm) | 672 |
| Packed - Depth (mm) | 543 |
| Weight - Nett (Kg) | 33.1 |
| Weight - Gross (Kg) | 36.7 |
All prices are exclusive of GST and freight, which are automatically calculated on order confirmation and/or checkout. Items in stock are generally dispatched within 1-2 working days of order being confirmed. Standard MDR terms and conditions (available below) apply to all orders.