MB Quart XK1113 Features: Composite basket w/original German-spec material Upgraded 20mm pure titanium dome tweeter Tweeter features nylon surround for lower fs Mica-filled PP cone mated to UV butyl surround 12bd/octave crossovers used throughout line including coaxials Coaxial crossover hidden in tweeter post for added protection and increased reliability CROSSOVER SLOPE: 12db/octave CUT-OUT: 4.48 CHASSIS DEPTH FROM FLANGE: 2 RMS Power: 35 Watts Sensitivity: 88 dB Frequency Response: 55-32,000Hz Impedance: 4 Ohm