Bass-midrange speakers, 40 WMAX, 20 WRMS, 8 Ω (/8) and 4 Ω (/4) Especially suitable for miniature speaker systems and column speakers. Impedance (Z) | 4 Ω | Resonant frequency (fs) | 120 Hz | Max. frequency range | f3-16,000 Hz | Music power | 40 WMAX | Max. voltage | | Power rating (P) | 20 WRMS | SPL (1 W/m) | 88 dB | Radiation angle | | Suspension compl. (Cms) | 1.1 mm/N | Moving mass (Mms) | 1.6 g | Mech. Q factor (Qms) | 2.82 | Electr. Q factor (Qes) | 0.68 | Total Q factor (Qts) | 0.55 | Equivalent volume (Vas) | 1.5 l | DC resistance (Re) | 3.3 Ω | Force factor (BxL) | 2.4 Tm | Voice coil induct. (Le) | 0.1 mH | Voice coil diameter | 19 mm | Voice coil former | aluminium | Linear excursion (XMAX) | ±0.75 mm | Eff. cone area (Sd) | 31 cm2 | Magnet weight | 150 g | Mounting cutout | | Mounting depth | | Dimensions | | Weight | 0.45 kg | |