Ground Zero GZPT 28SQ Tweeter

Ground Zero Audio 1.1″ high end silk dome tweeter with polished stainless steel housing

The GZPT 28SQ is a flagship 28mm silk dome tweeter from Ground Zero’s Plutonium Series—designed for exceptional clarity, speed, and tonal precision. Built with a 2-layer coated silk dome, a stainless steel housing that acts as a tuned rear chamber, and gold-plated terminals, this tweeter delivers a smooth, extended frequency response from 2 kHz to 30 kHz.

A resonance frequency of just 770 Hz and 100W RMS power handling make it ideal for active 2- or 3-way SQ systems, offering effortless reproduction of even the most delicate high-frequency detail. With its hex-style protective grille and compact design, the GZPT 28SQ is a serious component for sound quality enthusiasts who demand precision, staging, and realism.

Specifications / Information:

• 28 mm / 1.1″ silk dome tweeter

• Made in Germany

• Double coated silk dome

• High power capable copper voice coil

• Polished stainless steel housing

• Damped coupled chamber

• Neodymium motor

• Gold plated screw terminal

• 1 pair / package

• Diameter 28 mm / 1.10″

• Power handling (RMS/max.) 100 / 150 Watts

• Impedance 4 Ohms

• Efficiency 90 dB

• Frequency Response 2000 Hz – 30 kHz

• Cone 2 layer coated silk

• Mounting Ø 48 mm / 1.89″

• Mounting depth 35 mm / 1.38″

• Resonance frequency (Fs) 770 Hz