Celestion SL12Si
| Brand | Celestion |
| Model | SL12Si |
| Drivers | |
| Woofer | |
| Woofer diameter (mm) | |
| Midrange | |
| Midrange diameter (mm) | |
| Tweeter | |
| Tweeter diameter (mm) | |
| Frequency response | |
| Enclosure | Sealed |
| Sensitivity (dB) | 86 |
| Impedance (Ω) | 8 |
| Recommended amplifier power, least (W) | 25 |
| Recommended amplifier power, most (W) | 150 |
| Built-in amplifier power (W) | |
| Height (mm) | 530 |
| Width (mm) | 200 |
| Depth (mm) | 286 |
| Weight (kg) | 13.4 |