Technical data Power RMS / max. P 120 / 170 Watts (highpass 3,000 Hz at 12 dB/Oct.) Impedance Z 4 Ω DC resistance Re 3.4 Ω Frequency response 1,800 – 25,000 Hz Resonance frequency Fs 760 Hz Sensitivity SPL 93 dB @ 2.83V / 1m 90 dB @ 1W / 1m Voice coil diameter ø 28 mm / 1.10″ Cone area Sd 6.2 cm² Moving mass Mms 0.32 g Cone material Silk dome with a visco-elastic Acronal coating on both sides Outer diameter ø 60 mm / 2.4″ Installation diameter ø 52 mm / 2.1″ Installation depth 25 mm / 1.0″ Recommended crossover frequencies for the highpass Slope Minimum crossover frequency 6 dB/Octave 3,500 Hz 12 dB/Octave 2,500 Hz 24 dB/Octave 1,800 Hz Scope of delivery 2 x High-End Tweeter BRAX MATRIX ML28 PRO 2 x Mounting ring 4 x Grille 1 x Allen key 1 x Certificate 1 x Data sheet