Celestion CF0820M
8-inch, cast aluminium chassis, ferrite magnet midrange driver
| Brand | Celestion |
| Model | CF0820M |
| Kind | Woofer |
| Nominal diameter (mm) | 200 |
| Impedance (Ω) | 8 |
| Rated power (W) | 250 |
| Maximum power (W) | |
| Sensitivity (dB, 1 W/1 m) | 98 |
| Frequency response | 150 Hz – 6000 Hz |
| Resonance frequency, fs (Hz) | 202 |
| DC resistance, Re (Ω) | 5.39 |
| Mechanical Q, Qms | 1.784 |
| Electrical Q, Qes | 0.831 |
| Total Q, Qts | 0.567 |
| Equivalent volume, Vas (l) | 2.12 |
| Effective piston area, Sd (cm²) | 226.98 |
| Moving mass, Mms (g) | 21.38 |
| Force factor, BL (T·m) | 13.27 |
| Voice coil inductance, Le (mH) | 0.12 |
| Linear excursion, Xmax (mm) | 3.5 |
| Excursion limit, Xmech (mm) | |
| Voice coil diameter (mm) | 50 |
| Cutout diameter (mm) | 187 |
| Mounting depth (mm) | 113 |
| Cone material | Treated paper |
| Magnet material | Ferrite |
| Weight (kg) | 3.4 |