Ground Zero GZPK 165SQ-C Midwoofer

Ground Zero Audio 6.5″ high end midwoofer with GZ-design aluminium cast basket offering unique ventilation

Crafted for the most refined sound systems, the GZPK 165SQ-C is a 6.5" high-end midwoofer from Ground Zero’s elite Plutonium Series. Featuring a ceramic-coated aluminum cone, a Klippel®-optimized motor structure, and a custom-engineered GZ-design cast aluminum basket with advanced ventilation, this speaker delivers exceptional control, clarity, and dynamic range.

Its hybrid neodymium-ferrite motor, lightweight copper-clad aluminum voice coil, and precision damping make it ideal for SQ-focused active systems. With a frequency response from 40 Hz to 5 kHz and RMS handling of 140W, the GZPK 165SQ-C offers outstanding midbass authority and smooth midrange response—perfect for competition-level performance or any system where fidelity comes first.

Specifications / Information:

• 6.5″ high end midwoofer

• 38 mm / 1.5″ voice coil

• Aluminium-ceramics cone

• High-efficient hybrid motor with neodymium and ferrite magnets

• Lightweight, 2-layer copper clad aluminium voice coil

• GZ-design hexagon style NRG* protection grill with logo option

• Gold-plated GZ-design screw terminal

• Chrome plated magnet cover

• Optimised using the renowned Klippel® measurement system

• 1 pair / package

• Model High-quality SQ midwoofer

• Diameter 165 mm / 6.5″

• Power handling (RMS/max.) 140 / 200 Watts

• Impedance 4 Ohms

• Efficiency 89 dB

• Frequency Response 40 Hz – 5000 Hz

• Voice coil 38 mm / 1.5″

• Cone Aluminum-ceramics

• Mounting Ø 144 mm / 5.67″

• Mounting depth 70 mm / 2.76″

• Resonance frequency (Fs) 38 Hz