L-Acoustics
L-Acoustics
SB28
Dual 18-inch subwoofer
A dual 18-inch subwoofer extending the system down to 25 Hz, below where the main speakers stop. Used for gala dinners with a band, launches with a scored reveal, and any programme where music has to be felt as well as heard.
Enquire About the SB28
We will confirm the setup and availability for your event.
What It Is
1300 × 550 × 700 mm and 93 kg, so it is ground-stacked or flown as a planned lift rather than carried in. A speech-led conference rarely calls for one.
What It Does
- DesignPassive dual 18-inch subwoofer
- Maximum SPL142 dB
- LoadingBass reflex with laminar-flow vents
- LF drivers2 × 18-inch neodymium direct-radiating drivers
Best For
Specifications
- Speaker input
- 1 × 4-pole speakON
- Nominal impedance
- 4 Ω
- Standard presets
- [SB28_60] and [SB28_100]
- Cardioid presets
- [SB28_60_C] and [SB28_100_C]
- Amplified controllers
- LA8 / LA12X
- Handles
- Integrated into cabinet
| Acoustic | |
|---|---|
| Low-frequency limit | 25 Hz−10 dB; [SB28_100] preset |
| Maximum SPL | 142 dBPeak at 1 m half-space, crest-factor-4 pink noise; [SB28_100] |
| Loading | Bass reflex with laminar-flow vents |
| Connections | |
| Speaker input | 1 × 4-pole speakON |
| Drivers | |
| LF drivers | 2 × 18-inch neodymium direct-radiating drivers |
| Electrical | |
| Nominal impedance | 4 Ω |
| Published RMS power handling | 1255 WValue in official archived user manual v3.0, p10; older third-party listings differ |
| Handling | |
| Handles | Integrated into cabinet |
| Physical | |
| Dimensions (W × H × D) | 1300 × 550 × 700 mm |
| Net weight | 93 kg |
| Cabinet | Baltic birch plywood |
| Front | Corrosion-coated steel grille and acoustically neutral Airnet fabric |
| Processing | |
| Standard presets | [SB28_60] and [SB28_100] |
| Cardioid presets | [SB28_60_C] and [SB28_100_C]Requires the documented multi-enclosure arrangement and signal assignment |
| Rigging | |
| Hardware | Integrated rails/rigging components; aluminium components documented |
| System | |
| Design | Passive dual 18-inch subwoofer |
| Amplified controllers | LA8 / LA12X |
Documents
Use the manufacturer documents for detailed setup and operating information.
Need This for an Event?
