| Specification | Value | Unit | |
| Overall diameter | 280 | mm | |
| Cutout Diameter/Square | 251.2 | mm | |
| Min. frontplate thickness | 8.45 | mm | |
| Overall depth | 131.95 | mm | |
| Motor assembly depth | - | mm | |
| Motor assembly diameter | - | mm | |
| Screwfitting | DIN 7984 / Ø 4.50 | mm | |
| Terminal | - | mm | |
| Shipping weight (pair) | 4.5/3.8 | Kg | |
| Shipping box size (pair) | 300/180/300 | mm | |
P280 Passive Radiator
The P280 is an 11 inch passive radiator with sandwich dome.
Extra mass can easily be added to tune the resonance frequency.
A simple but robust screw mount provides fixing of stainless steel discs in the desired quantity.
The values of Vas and Cms allow for extensive tuning and various box sizes. A new basket design provides for perfect airflow without compression effects or turbulences.
The stated resonance frequency of the passive radiator is taken at 3mm excursion, offering a realistic value.
| Dome material | Sandwich |
| Application | Passive Radiator |
| Overall diameter | 280 MM |
| Cutout Diameter/Square | 251.2 MM |
| Overall depth | 131.95 MM |
| Motor assembly depth | - |
| Motor assembly diameter | - |
Main Features
Airflow optimised Basket Design
Robust Extra Mass Screw Mount
Soft Highshape Rubber Surround
Wideband Resonanztuning
15Hz - 45 Hz
Mechanical Data
Thiele/Small Parameters
| Specification | Value | Unit | |
| Sensitivity (2.83V / 1m) | SPL | - | dB |
| DC-resistance | Re | - | Ohm |
| Resonance frequency | Fs | 21 | Hz |
| Equivalent volume of air | Vas | 226 | ltr |
| Mechanical Q | Qms | - | |
| Electrical Q | Qes | - | |
| Total Q | Qts | - | |
| Effective piston area | Sd | 408 | Cm2 |
| Moving mass | Mms | 63 | g |
| Suspension compliance | CMs | 0.94 | mm/n |
| Mechanical resistance | Rms | 1.87 | Kg*s |
voice coil parameters
| Specification | Value | Unit | |
| Power handling | P | - | W |
| Linear excursion | Xmax | +/-13 | mm |
| Voice coil diameter | - | mm | |
| Voice coil former material | - | ||
| Voice coil material | - | ||
| Voice coil inductance | Le | - | mH |
| Force factor | Bl | - | N/A |
| Motor type | - | ||
| Ferrofluid filling | No | ||