subsim
Dual 12" Bass Reflex
Specifications
| Topology | bass reflex |
|---|---|
| Build complexity | simple |
| Net volume | 180 L |
| Dimensions (H×W×D) | 820 × 700 × 540 mm |
| Footprint | 3780 cm² |
| Weight | 54 kg |
| F3 | 48 Hz |
| F6 | 40 Hz |
| Fb (port/vent tuning) | 44 Hz |
| Max SPL | 132 dB |
| Impedance minimum | 3.4 Ω |
| Recommended crossover | 100 Hz |
| Recommended power | 1000 W |
| Power handling (AES) | 1000 W |
| Power handling (program) | 2000 W |
| Max port velocity | 22 m/s |
| Output density | 109.4 dB/size |
| Plywood sheets | 3× 2440×1220 mm |
| Connectors | speakON NL4 |
Drivers (2)
| Model | Format | Impedance | Fs | Detail | Pe | Sensitivity |
|---|---|---|---|---|---|---|
| B&C 12NBX100 | 12" | 8 Ω | 41 Hz | Qts 0.22 · Vas 51 L · Xmax 10 mm | 1000 W | 96 dB |
Measurements / Simulations
Images
Sources
- design.txt · hornresp
Notes
Build notes
Sample data: values are illustrative, not measured.
Two 12NBX100-8 drivers in a shared bass reflex enclosure, wired in parallel to present 4 Ω. The dual-12 format gives a larger Sd than a single 15“ with a more compact footprint per driver.
Port
- Two round ports, 100 mm diameter each
- Port length: 310 mm
- Tuning: 44 Hz (Fb)
Wiring
Both drivers in parallel: nominal 4 Ω load. Ensure the amplifier is 4 Ω rated. Drivers should be matched (same production batch if possible) to keep displacement symmetrical.