Delta-X15B is a compact 15-inch passive subwoofer designed to deliver powerful low-end reinforcement in portable and installed sound systems.
Constructed from 18 mm birch plywood and finished in our rugged Tough-Tone paint, it’s engineered to withstand the demands of touring while maintaining a professional appearance.
Optimised to complement the Delta-X full-range loudspeakers, the rear panel allows straightforward integration into both passive and bi-amped system setups.
Handling 700 W continuous power (up to 2,800 W peak) and reaching a maximum SPL of 132 dB, the Delta-X15B adds depth and punch without overwhelming smaller venues or mobile rigs.
A Wharfedale Pro custom LF driver delivers tight, responsive bass, while the carefully tuned cabinet design ensures clarity and control at high volumes.
With integrated side handles and a 35 mm pole socket, the Delta-X15B is easy to transport, position, and deploy—bringing solid low-frequency support to the Delta-X series.
| 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 | 132 dB (Half Space) |
| Freq Range (-10 dB) | 38 Hz - 150 Hz |
| Freq Response (+/-3 dB) | 42 Hz -2 kHz (Bi-amp) |
| IP Certification | None |
| Driver Brand | Wharfedale Pro |
| LF Driver Size | 15" |
| LF Voice Coil Size | 4" |
| LF Rated Impedance | 8 Ω |
| LF Power (RE:AES2-2012) | 700 W |
| Preset | Yes |
| 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 | Ground |
| Pole Mount | 35 mm |
| Sensitivity 2.83v / 1m | 98 dB |
| System Rated Impedance | 8 Ω |
| Recommended HPF = BW 18 dB/OCT. | 38 Hz |
| EQ Type | None |
| Included Accessory | User Manual |
| 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) | 543 |
| Packed - Width Rear (mm) | 543 |
| Packed - Depth (mm) | 672 |
| Weight - Nett (Kg) | 31.5 |
| Weight - Gross (Kg) | 35.12 |
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.