AS250AM-4-559
Automotive Bass Driver
| Dome material | Aluminium-Sandwich |
| Application | Subwoofer |
| Overall diameter | 250 MM |
| Cutout Diameter | 230 MM |
| Overall depth | 132 MM |
| Motor assembly depth | 48 MM |
| Motor assembly diameter | 156 MM |
Main Features
Automotive qualified
Stepped VC winding principle
No compression design
20 HZ - 300 HZ, closed or vented Box
The AS250AM-4-559 is an 11 inch bass driver with aluminum honeycomb sandwich dome, being the automotive-qualified version of our home-audio AS250. A unique solution was achieved for extraordinary BL(x) linearity in overhung motors, utilizing our own software development for voice coil windings. By finding a new approach to winding principles, we reduced compression effects and dynamical misbehavior by a factor of 10, resulting in higher dynamics and resolution. Our exceptionally hard aluminum sandwich dome is used for the updated CELL bass drivers that allow for negligible delay and energy storage. The hidden surround serves for reduced outer diameter and linear excursion of +/- 16mm. A new developed spider shape makes huge excursion without compression possible.
We recommend our AS250AM-4-559 for an application from 20 Hz - 300 Hz.
Mechanical Data
| Specification | Value | Unit | |
| Overall diameter | 250 | mm | |
| Cutout diameter | 230 | mm | |
| Min. frontplate thickness | 18 | mm | |
| Overall depth | 132 | mm | |
| Motor assembly depth | 48 | mm | |
| Motor assembly diameter | 156 | mm | |
| Screwfitting | DIN 7984 / Ø 4.50 | mm | |
| Terminal | +: 6.3 x 0.8 / -: 4.8 x 0.8 | mm | |
| Shipping weight (pair) | 23 | Kg | |
| Shipping box size (pair) | 320/320/450 | mm | |
Thiele Small Parameters
| Specification | Value | Unit | |
| Efficiency | η0 | 38 | % |
| DC-resistance | Re | 4.00 | Ω |
| Resonance frequency | Fs | 21,37 | Hz |
| Equivalent volume of air | Vas | 164.68 | ltr |
| Mechanical Q | Qms | 7.17 | |
| Electrical Q | Qes | 0..40 | |
| Total Q | Qts | 0.38 | |
| Effective piston area | Sd | 397.61 | Cm2 |
| Moving mass | Mms | 75.50 | g |
| Suspension compliance | CMs | 0.73 | mm/n |
| Mechanical resistance | Rms | 1.41 | Ns/m |
voice coil parameters
| Specification | Value | Unit | |
| Power handling | P | 300 | W |
| Linear excursion | Xmax | +/-9 | mm |
| Voice coil diameter | 61 | mm | |
| Voice coil former material | Ti | ||
| Voice coil material | Cu | ||
| Voice coil inductance | Le | 0.24 | mH |
| Force factor | Bl | 10.03 | N/A |
| Motor type | Overhung | ||
| Ferrofluid filling | No | ||
Frequency Response [db]
Impedance [OHM]
Distortion [%]
