Celestion TF1225
Celestion TF1225 - 250W 12 inch midrange driver with pressed steel chassis and ferrite magnet, 97dB sensitivity and 50-4000Hz frequency range.
| Brand | Celestion |
| Model | TF1225 |
| Kind | Woofer |
| Nominal diameter (mm) | 305 |
| Impedance (Ω) | 8 |
| Rated power (W) | 250 |
| Maximum power (W) | |
| Sensitivity (dB, 1 W/1 m) | 97 |
| Frequency response | 50 Hz – 4000 Hz |
| Resonance frequency, fs (Hz) | 55.6 |
| DC resistance, Re (Ω) | 5.08 |
| Mechanical Q, Qms | 3.112 |
| Electrical Q, Qes | 0.42 |
| Total Q, Qts | 0.37 |
| Equivalent volume, Vas (l) | 67.27 |
| Effective piston area, Sd (cm²) | 530.93 |
| Moving mass, Mms (g) | 48.52 |
| Force factor, BL (T·m) | 14.32 |
| Voice coil inductance, Le (mH) | 0.86 |
| Linear excursion, Xmax (mm) | 4.5 |
| Excursion limit, Xmech (mm) | |
| Voice coil diameter (mm) | 64 |
| Cutout diameter (mm) | 283 |
| Mounting depth (mm) | 130 |
| Cone material | Kevlar loaded paper |
| Magnet material | Ferrite |
| Weight (kg) | 4.1 |