The Dynacord F17 PWH is a legendary, high-efficiency 18-inch Planar Waveguide Horn (PWH) subwoofer engineered for medium to long-throw live sound reinforcement. Most famously deployed as the foundational low-frequency component of the classic Dynacord XA-28 and XA-48 mobile PA systems, it combines the punch and projection of a horn-loaded enclosure with the deep extension of a vented Helmholtz resonator.
| Parameter | Technical Specification |
| Enclosure Design | Planar Waveguide Horn (PWH) with a vented transducer cabinet |
| Transducer Components | 1 x 18″ Electro-Voice EVX 180A OEM (or EVX 180B) heavy-duty woofer |
| Power Capacity | 500 Watts RMS / 1000 Watts Program |
| Nominal Impedance | 8 Ohms |
| Frequency Range (-10 dB) | 39 Hz — 255 Hz |
| Sensitivity (1W / 1m) | 99 dB |
| Maximum Calculated SPL | 129 dB peak |
| Dimensions (W x H x D) | 606 x 625 x 792 mm (including castors and feet) |
| Weight | 42.5 kg (93.7 lbs) |
