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 |