Automotive / Car Audio
User Manual for Ground Zero GZRC 165.2SQ-IV Loudspeaker System
Quick guide for the Ground Zero GZRC 165.2SQ-IV component loudspeaker system. Includes installation tips, wiring diagrams, tweeter level adjustments, and technical specifications.
Table of contents
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Click an image to enlargeQuick guide from the manual
The Ground Zero GZRC 165.2SQ-IV is a high-quality 2-way SQ component loudspeaker system. This manual provides essential installation and configuration steps to ensure optimal performance. Key requirements include using the integrated low-pass filter for the midwoofer and correctly wiring the system to avoid interference. The tweeter level can be adjusted via a jumper on the crossover.
Installation Notes
Proper installation is critical for safety and performance. Follow these guidelines:
- Safety First: Never drill holes into the vehicle's gas tank, brake lines, wiring, or other critical components.
- Cable Routing: Avoid routing cables over sharp edges to prevent damage.
- Interference Prevention: Keep signal and speaker cables away from antenna electronics and antenna cables to maintain radio reception quality.
- Power Separation: Always lay power supply wiring separately from speaker wiring to avoid electrical disturbance.
- Wiring Quality: Use adequately dimensioned power and speaker wires for the connection.
Wiring
The system includes a crossover that connects the head unit/amplifier to the midwoofer and the tweeter. The low-pass filter for the midwoofer is integrated into the connection wire and must be used for best performance.
Tweeter Level Adjustment
The tweeter level can be customized using the jumper position on the crossover:
- 0 dB: Recommended setting.
- - 2 dB: Reduced level.
- + 2 dB: Increased level.
Technical Specifications
The system features the following specifications:
- Impedance: 3 Ohm
- Frequency Response: 35 Hz – 25 kHz
- Power Handling (RMS): 120 Watts
- Power Handling (Max): 190 Watts
- Cut-off Frequency: 4300 Hz (6/12 dB/oct.)
- Midwoofer Mounting Depth: 68 mm
- Tweeter Mounting Depth: 18 mm
Safety and Warranty
Avoid permanently high volume levels over 85 dB to prevent irreparable hearing damage. The product contains magnetized metals and should be recycled according to local regulations. Warranty claims are voided by improper installation, misuse, or use under competitive conditions.
Manufacturer information
Ground Zero Audio
Practical help
Common problems
Radio interference
Ensure signal and speaker cables are routed away from antenna electronics and antenna cables.
Electrical noise/disturbance
Ensure power supply wiring is laid separately from speaker wiring.
Hearing damage
Avoid listening at permanently high volume levels exceeding 85 dB.
Before use
- Verify that no drilling will damage gas tanks, brake lines, or vehicle wiring.
- Ensure cables are not routed over sharp edges.
- Use adequately dimensioned power and speaker wires.
- Ensure the integrated low-pass filter is connected to the midwoofer.
- Check that the tweeter level jumper is set to the desired position (0 dB recommended).
Specs in practice
- Power Handling (RMS)
- 120 Watts continuous power capacity.
- Cut-off Frequency
- 4300 Hz crossover point between midwoofer and tweeter.
- Mounting Depth
- Required depth for installation (68 mm for midwoofer, 18 mm for tweeter).
Images and diagrams
- The wiring diagram illustrates the connection from the amplifier/head unit to the crossover, and subsequently to the midwoofer and tweeter.
- The diagram highlights the integrated low-pass filter on the midwoofer connection wire.
Model compatibility
- Designed as a 2-way SQ component system.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.