20 cm (8") HiFi woofer with polypropylene cone. Due to balanced frequency response curve suitable as low-midrange driver for large 4-way speaker systems. Due to the special basket design suitable as replacement driver for many HiFi speakers.
| Rated power | 80 W |
|---|---|
| Maximum power | 120 W |
| Nominal impedance Z | 4 Ohm |
| Frequency response | fu–7000 Hz |
| (fu: Lower cut-off frequency depending on cabinet) | . |
| Mean sound pressure level | 88 dB (1 W/1 m) |
| Opening angle (-6 dB) | 67°/4000 Hz |
| Excursion limit | +/−6 mm |
| Resonance frequency fs | 47 Hz |
| Magnetic induction | 0.85 T |
| Magnetic flux | 400 µWb |
| Height of front pole-plate | 5 mm |
| Voice coil diameter | 30 mm |
| Height of winding | 11 mm |
| Cutout diameter | 186 mm |
| Net weight | 1.3 kg |
| D.C. resistance Rdc | 3.3 Ohm |
| Mechanical Q factor Qms | 5.56 |
| Electrical Q factor Qes | 1.44 |
| Total Q factor Qts | 1.14 |
| Equivalent volume Vas | 39 l |
| Effective piston area Sd | 240 cm² |
| Dynamically moved mass Mms | 23 g |
| Force factor Bxl | 4.5 T m |
| Inductance of the voice coil L | 0.7 mH |
| Connections | 5.2 x 0.8 mm (+)/2.8 x 0.8 mm (-) |
| Protective system | IP 65 |
