GROUND ZERO GZTT 20S

20 mm / 0.79″ high quality silk dome tweeter including mounting accessories 20 mm / 0.79″ silk dome tweeter Coated silk dome Variable mounting parts Ferrofluid cooled Neodymium motor 1 pair / package - impedance 4 Ohm - frequency response 3 – 20 kHz - efficiency (SPL) 89 dB - resonance frequency 1700 Hz - power handling (RMS)* 40 Watt / Watts (HPF @ 3500 Hz / - 12dB/Okt./oct) - power handling (max)* 70 Watt / Watts (HPF @ 3500 Hz / 12dB/Okt./oct) - cut-off frequency (HPF) 3500 Hz / 12 dB ( recommended) - outer diameter 54 mm / 2.13” - mounting cutout 46 mm / 1.81” - mounting depth 18 mm / 0.70.