GZUK 165SQ

The Ground Zero GZUK 165SQ is a high-quality 165-mm low-midrange driver from the Uranium series, designed for sound-oriented car audio systems. Its black anodized aluminum cone combines high rigidity with low weight, creating ideal conditions for precise and controlled sound reproduction.

For the driver, Ground Zero relies on a linearized neodymium magnet system combined with a generously sized 50-mm copper voice coil. This design enables high power handling and controlled cone movement. The sturdy die-cast aluminum basket provides a low-resonance base for the speaker.

With a frequency range of 40 to 3,500 Hz, the GZUK 165SQ is suitable both as a low-midrange driver in high-quality 2-way systems and for sophisticated active car audio setups. Thanks to its installation depth of just 63 mm, the 165-mm speaker can also be integrated into numerous vehicles in a relatively space-saving manner.

Gold-plated connectors ensure reliable contact. The package also includes the distinctive Ground Zero Hexagon protective grilles

Product Features

• 165 mm (6.5") Sound-Quality Woofer/Midrange Driver
• Designed for sound-oriented car audio systems
• Black anodized aluminum diaphragm
• Sturdy, low-twist membrane construction
• Linearized Neodymium Magnet Actuator
• 50 mm (2") copper voice coil
• Underhung Voice Coil Design
• Low-Resonance Ground Zero Die-Cast Aluminum Basket
• Heavy-Duty Rubber Seam
• Gold-plated screw/solder terminal
• Ground Zero Hexagon Protective Grille Included
• Nominal impedance of 4 ohms
• Klippel®-Optimized Design
• Sold as a pair
  
  

Technical Specifications

• Speaker Type: SQ Low-Midrange / Mid-Kick Woofer
• Nominal diameter: 165 mm / 6.5"
• Nominal impedance: 4 ohms
• RMS Power Handling: 120 watts
• Maximum power handling: 180 watts
• Frequency response: 40 Hz – 3,500 Hz
• Sensitivity (SPL): 87 dB (1 W / 1 m)
• Voice coil diameter: 50 mm / 2"
• Voice coil material: Copper
• Diaphragm material: anodized aluminum
• Magnet/Drive System: Linearized Neodymium System
• Basket material: Die-cast aluminum
• Dust Cap: Soft Dome
• Recommended high-pass filter (HPF): 60 Hz / 12 dB/oct.
• Recommended low-pass filter (LPF): 3,500 Hz / 12 dB/oct.
• Connection: gold-plated screw/solder terminal
• Outer diameter: 165 mm
• Installation diameter: 144 mm
• Installation depth: 63 mm
• Protective Grille: Ground Zero Hexagon Design
• What's Included: 1 pair
  
  

Thiele-Small parameters (TSP)

• Resonance frequency (Fs): 54.6 Hz
• DC resistance (Re): 3.2 ohms
• Mechanical Quality (Qms): 3.87
• Electrical quality (Qes): 0.77
• Overall Quality (Qts): 0.64
• Equivalent volume (Vas): 12.6 liters
• Moving mass (Mms): 16.3 g
• Force factor (BL): 4.84 Tm
• Mechanical resistance (Rms): 1.44 kg/s
• Elasticity (cm/N): 0.52 mm/N
• Voice coil inductance (Le): 0.17 mH at 1 kHz
• Diaphragm area (Sd): 128.6 cm²
• Maximum diaphragm excursion (Xmax): 12 mm peak-to-peak