Ground Zero GZNT 28SQ

1.1″ high performance silk dome tweeter with coupled chamber28 mm / 1.1″ high performance tweeterCoated silk domeHigh power capable copper voice coilAnodyzed aluminum housingDamped coupled chamberNeodymium motorGold plated screw terminal1 pair / package Model High-Performance tweeter Diameter 28 mm / 1.10″ Power Handling (RMS/max.) 90 / 140 Watts Impedance 4 Ohms Efficiency 91 dB Frequency Response 2000 Hz – 25 kHz Empfohlener Hochpass-Filter 3000 Hz @ 12 dB/oct Voice Coil 28 mm / 1.1″ Membran Layout Coated silk dome Magnet material Neodymium Mounting Ø 48 mm / 0.19″ Mounting Depth 29 mm / 1.14″ Resonance Frequency (Fs) 1350 Hz.