FR 8, 8 OHM & FR8, 4 OHM 8 cm (3.3 ) full range speaker with good bass reproduction, balanced frequency response and high efficiency. Especially suitable as built-in speaker for music reproduction and as driver for 100 V network column speakers. Typical applications: - Narrow network column speakers - Control speaker for electronic devices - Ceiling-mounted speakers in railway carriages and busses - Electronic musical instruments Technical Data: FR8, 8 Ohm FR8, 4 Ohm Rated power 10 Watt Maximum power 15 Watt Nominal impedance 8 Ohm 4 Ohm Frequency response (-10 dB) 130 - 20000 Hz Mean sound pressure level 86 dB (1W/1m) Maximum cone displacement 4 mm Resonance frequency fs 150 Hz Magnetic induction 1,4 Tesla Magnetic flux 200 Weber Height of front pole-plate 3 mm Voice coil diameter 1,5 cm Height of winding 0,5 cm Cutout diameter 7,5 cm Net weight 0,24 kg D.C. resistance Rdc 7 Ohm Mechanical Q factor Qms 1,16 Total Q factor Qts 0,96 Equivalent volume Vas 0,67 l Effective piston area Sd 30 cm2 Dynamically moved mass Mms 1,7 g Force factor Bxl 2,5 T m Inductance of the voice coil L 0,62 mH Frequency and Impedance Response Radiation Pattern at 2000Hz Radiation Pattern at 5000 Hz Radiation Pattern at 10000 Hz