GF 250 2 X 4 OHM

Art. No. -

25 cm (10") High-End woofer with black glass fiber 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.
No longer available.

Used in / Accessories:
VIB EXTRA GF
VOX 250 LIGHT
KM 140

sketch

waterfall spectrum

GF250_FS

frequency- and impedance response

Technical Data:
Rated power	150 Watt
Maximum power	200 Watt
Nominal impedance Z	Eine Schwingspule offen: 4 Ohm / Beide Schwingspulen in Reihe: 8 Ohm / Beide Schwingspulen parallel: 2 Ohm
Frequency response	fu - 6000 Hz
(fu: Lower cut-off frequency depending on cabinet)	.
Mean sound pressure level	Eine Schwingspule offen: 87 dB (1 W/1 m) / Beide Schwingspulen in Reihe: 90 dB (1 W/1 m) / Beide Schwingspulen parallel: 90 dB (1 W/1 m)
Maximum cone displacement	20 mm
Resonance frequency fs	Eine Schwingspule offen: 26 Hz / Beide Schwingspulen in Reihe: 24 Hz / Beide Schwingspulen parallel: 26 Hz
Magnetic induction	1,1 Tesla
Magnetic flux	Eine Schwingspule offen: 1400 µ Weber / Beide Schwingspulen in Reihe: 1430 µ Weber / Beide Schwingspulen parallel: 1430 µ Weber
Height of front pole-plate	8 mm
Voice coil diameter	50 mm
Height of winding	20 mm
Cutout diameter	235 mmm
Net weight	4 kg
D.C. resistance Rdc	Eine Schwingspule offen: 3,1 Ohm / Beide Schwingspulen in Reihe: 6,2 Ohm / Beide Schwingspulen parallel: 1,6 Ohm
Mechanical Q factor Qms	Eine Schwingspule offen: 4,61 / Beide Schwingspulen in Reihe: 4,35 / Beide Schwingspulen parallel: 4,23
Electrical Q factor Qes	Eine Schwingspule offen: 0,63 / Beide Schwingspulen in Reihe: 0,29 / Beide Schwingspulen parallel: 0,31
Total Q factor Qts	Eine Schwingspule offen: 0,55 / Beide Schwingspulen in Reihe: 0,28 / Beide Schwingspulen parallel: 0,29
Equivalent volume Vas	Eine Schwingspule offen: 110 l / Beide Schwingspulen in Reihe: 134 l / Beide Schwingspulen parallel: 110 l
Effective piston area Sd	346 cm²
Dynamically moved mass Mms	54 g
Force factor Bxl	Eine Schwingspule offen: 6,5 T m / Beide Schwingspulen in Reihe: 13 T m / Beide Schwingspulen parallel: 6,5 T m
Inductance of the voice coil L	Eine Schwingspule offen: 0,77 mH / Beide Schwingspulen in Reihe: 1,54 mH / Beide Schwingspulen parallel: 0,77 mH

radiation pattern 500 Hz

radiation pattern 1000 Hz

radiation pattern 2000 Hz

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