20 cm (8") High-End woofer with black glass fibre cone, solid aluminium die-cast basket and elastic rubber surround. Designed for multi-purpose applications due to 2 x 4 ohms double voice-coil, with excellent properties as 8 ohms drivers in series configuration. The long stroke voice-coil in conjunction with the extended rear pole plate, the vented damper, the vented magnet and the capton voice-coil carrier guarantees long strokes and highest power handling.
Possible connections:
(1) one voice coil not connected
(2) both voice coils in series
(3) both voice coils in parallel
| Technical Data: |
|---|
| Rated power | 120 W |
| Maximum power | 180 W |
| Nominal impedance Z | (1) 4 Ohm
(2) 8 Ohm
(3) 2 Ohm |
| Frequency response | fu–8000 Hz |
| (fu: Lower cut-off frequency depending on cabinet) | . |
| Mean sound pressure level | (1) 85 dB (1 W/1 m)
(2) 88 dB (1 W/1 m)
(3) 88 dB (1 W/1 m) |
| Opening angle (-6 dB) | 46°/4000 Hz |
| Excursion limit | +/−10 mm |
| Resonance frequency fs | (1) 34 Hz
(2) 30 Hz
(3) 35 Hz |
| Magnetic induction | 1,3 T |
| Magnetic flux | 930 µWb |
| Height of front pole-plate | 6 mm |
| Voice coil diameter | 38 mm |
| Height of winding | 18 mm |
| Cutout diameter | 190 mm |
| Net weight | 2,5 kg |
| D.C. resistance Rdc | (1) 2,9 Ohm
(2) 5,8 Ohm
(3) 1,4 Ohm |
| Mechanical Q factor Qms | (1) 4,51
(2) 4,12
(3) 4,33 |
| Electrical Q factor Qes | (1) 0,93
(2) 0,37
(3) 0,44 |
| Total Q factor Qts | (1) 0,77
(2) 0,34
(3) 0,39 |
| Equivalent volume Vas | (1) 62 l
(2) 68 l
(3) 57 l |
| Effective piston area Sd | 214 cm² |
| Dynamically moved mass Mms | 25 g |
| Force factor Bxl | (1) 4,6 Tm
(2) 9,2 Tm
(3) 4,6 Tm |
| Inductance of the voice coil L | (1) 0,4 mH
(2) 1,1 mH
(3) 0,3 mH |
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