Visaton PR 250
Passive radiator consisting of the basket and oscillator from the TIW 250. Fitted with an adjustable mass in place of the voice coil. Fine tuning is by means of adding screw-on sections. An M12 x 40 bolt and an M12 nut are included in the package. The mass can be increased by adding heavier washers or a longer bolt. Instructions on calculating the mass are included.
| Brand | Visaton |
| Model | PR 250 |
| Kind | Passive radiator |
| Nominal diameter (mm) | |
| Impedance (Ω) | |
| Rated power (W) | |
| Maximum power (W) | |
| Sensitivity (dB, 1 W/1 m) | |
| Frequency response | |
| Resonance frequency, fs (Hz) | 14 |
| DC resistance, Re (Ω) | |
| Mechanical Q, Qms | |
| Electrical Q, Qes | |
| Total Q, Qts | |
| Equivalent volume, Vas (l) | |
| Effective piston area, Sd (cm²) | 320 |
| Moving mass, Mms (g) | 140 |
| Force factor, BL (T·m) | |
| Voice coil inductance, Le (mH) | |
| Linear excursion, Xmax (mm) | |
| Excursion limit, Xmech (mm) | |
| Voice coil diameter (mm) | |
| Cutout diameter (mm) | 233 |
| Mounting depth (mm) | |
| Cone material | |
| Magnet material | |
| Weight (kg) |