30 cm (12") high-end woofer with a black cellulose diaphragm, large-format magnet arrangement and a massive aluminium diecast basket. Thanks to the multiple venting of the voice coil (pole piece hole, holes in the pole piece plate, cutouts in the aluminium diecast cone to vent the spider from behind) losses and flow noise are minimised. The combination of the voice coil carrier made of capton and the large 65 mm voice coil allow extremely high volume levels.
| Technical Data: |
|---|
| Rated power | 300 W |
| Maximum power | 600 W |
| Nominal impedance Z | 8 Ohm |
| Frequency response | fu–4000 Hz |
| (fu: Lower cut-off frequency depending on cabinet) | . |
| Mean sound pressure level | 90 dB (1 W/1 m) |
| Excursion limit | +/−16 mm |
| Resonance frequency fs | 25 Hz |
| Magnetic induction | 1,1 T |
| Magnetic flux | 1800 µWb |
| Height of front pole-plate | 8 mm |
| Voice coil diameter | 65 mm |
| Height of winding | 23 mm |
| Cutout diameter | 288 mm |
| Net weight | 7 kg |
| D.C. resistance Rdc | 5,4 Ohm |
| Mechanical Q factor Qms | 4,59 |
| Electrical Q factor Qes | 0,30 |
| Total Q factor Qts | 0,28 |
| Equivalent volume Vas | 160 l |
| Effective piston area Sd | 510 cm² |
| Dynamically moved mass Mms | 92 g |
| Force factor Bxl | 16,5 Tm |
| Inductance of the voice coil L | 1,7 mH |
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