ShowMatch SMS118 subwoofer
Bose Professional ShowMatch SMS118 subwoofers are designed primarily to integrate with DeltaQ array loudspeakers and extend low-frequency response down to 29 Hz. The SMS118 enclosure width and integrated rigging allows fast integration in arrays with ShowMatch full-range modules using optional array frames and accessories. The portable-rated Baltic birch enclosure may also be used for ground-stack applications and includes an integrated mounting-pole adapter for use with other mid/high loudspeakers.
Bose ShowMatch SMS118 Technical Specification
| Category | Parameter | Detail |
| Performance | Frequency Range (-10 dB) | 29 Hz – 300 Hz |
| Calculated Max SPL @ 1 m (Peak) | 133 dB (half-space) / 127 dB (free field) | |
| Calculated Max SPL @ 1 m (Cont.) | 127 dB (half-space) / 121 dB (free field) | |
| Sensitivity (SPL / 1 W @ 1 m) | 98 dB (half-space) / 92 dB (free field) | |
| Power Handling (Long-term) | 750 W (Continuous) / 3000 W (Peak) | |
| Nominal Impedance | 4 $\Omega$ | |
| Coverage (H × V) | Omnidirectional | |
| Transducers | Low Frequency | 1 × Bose LF18 neodymium (18 in / 457 mm) |
| Voice Coil | 4.5 in (114 mm) | |
| Crossover | 60 Hz – 100 Hz (requires active crossover in DSP) | |
| Physical | Dimensions (H × W × D) | 21.2 × 30.1 × 30.5 in (540 × 765 × 775 mm) |
| Net Weight | 136.5 lb (61.9 kg) | |
| Enclosure Material | Baltic birch plywood | |
| Grille | 16-gauge (1.5 mm) perforated steel, powder-coated | |
| Colors | Black | |
| Mounting | Rigging | 4-point “quick pin” rigging |
| Inserts | 4 × M10 top / 4 × M10 bottom | |
| Pole Cup | M20 pole cup | |
| Other | Compliance | EN 54-24 Certified: No |
| Product Codes | 734302-0110 | |
| Warranty Period | 5 years |
- DeltaQ technology is the next-generation array design that allows “Q” (directivity) to vary with each module in the array for more consistent coverage over wide frequency range, reduced array weight and cost, and outstanding vocal clarity. Arrays can cover large vertical angles with fewer boxes.
- ShowMatch DeltaQ companion 1 × 18-inch subwoofer for low-frequency extension down to 29 Hz with mixed mid/high and subwoofer ShowMatch arrays.
- Bose Professional LF18 neodymium 18-inch, high-excursion, 4.5-inch voice coil, transducer provides maximum performance (same transducer as in Bose Professional RMS218).
- Integrated 4-point “quick pin” rigging allows arrays of up to 18 subwoofers with 10:1 safety factor.
- Front-grille mounted NL4 input, plus rear NL4 inputs, allow easy setup for “reversed box” cardioid arrays.