4 x 9 cm (1.6" x 3.5") full-range speaker with wood membrane and sturdy plastic basket. Flat, lightweight design using neodymium. The interaction between the individual components ensures an extremely linear sound reproduction quality right down to relatively low frequencies, so that the loudspeaker can also be used in miniature HiFi speakers. Technical data Rated power 4 W Music power 5 W Rated impedance Z 8 ohm Transmission range (-10 dB) 120 - 20,000 Hz Mean sound pressure level 83 dB (1 W/1 m) Excursion limit +/-1 mm Resonant frequency fs 220 Hz Magnetic induction 1.15 T Magnetic flux 184 µWB Upper pole plate height 2 mm Voice coil diameter 25.5 mm Winding height 2 mm Baffle opening: 36 x 86 mm Net weight 0.054 kg DC resistance Rdc 6.9 ohm Mechanical Q factor Qms 3.06 Electrical Q factor Qes 2.29 Total Q factor Qts 1.31 Equivalent volume of compliance Vas 0.43 l Effective diaphragm area Sd 23.5 cm² Dynamic moving mass Mms 0.9 g Drive factor Bxl 1.98 Tm Voice coil inductivity L 0.13 mH https://elecena.pl/product/18418778/8051-8-ohm-full-range-speaker 2021-05-10 https://elecena.pl/product/18418778/8051-8-ohm-full-range-speaker 2021-11-14 https://elecena.pl/product/18418778/8051-8-ohm-full-range-speaker 2023-09-12 https://elecena.pl/product/18418778/8051-8-ohm-full-range-speaker 2025-08-06