subsim
18" Tapped Horn
Specifications
| Topology | tapped horn |
|---|---|
| Net volume | 230 L |
| Dimensions (H×W×D) | 1020 × 600 × 680 mm |
| Footprint | 4080 cm² |
| Weight | 62 kg |
| F3 | 35 Hz |
| F6 | 28 Hz |
| Max SPL | 138 dB |
| Max SPL (excursion-limited) | 135 dB |
| Max SPL (thermal-limited) | 139 dB |
| Impedance minimum | 5.2 Ω |
| Recommended crossover | 90 Hz |
| Recommended power | 1000 W |
| Power handling (AES) | 1000 W |
| Power handling (program) | 2000 W |
| Max port velocity | 28 m/s |
| Output density | 114.4 dB/size |
| Plywood sheets | 5× 2440×1220 mm |
| Connectors | speakON NL4 |
Drivers (1)
| Model | Format | Impedance | Fs | Detail | Pe | Sensitivity |
|---|---|---|---|---|---|---|
| B&C 18DS115 | 18" | 8 Ω | 30 Hz | Qts 0.2 · Vas 168 L · Xmax 16.5 mm | 1700 W | 98 dB |
Measurements / Simulations
Images
Plans
Sources
- design.txt · hornresp
- system.aks · akabak
Notes
Build notes
Sample data: values are illustrative, not measured.
18“ tapped horn with a folded path. The driver fires into a tapered horn that doubles back on itself, cutting cabinet depth while keeping mouth area.
Key design choices
- Horn mouth area: ~2400 cm²
- Horn expansion ratio: ~1.4
- Throat area matched to driver Sd
- Internal bracing every 300 mm
Tuning
The design is optimised for flat response from 35 Hz upward. Low-pass at 80-100 Hz when used in a system.