Automotive / Car Audio
User Manual for Ground Zero GZUX 165.3SQ 3-Way Crossover
Quick guide for the Ground Zero GZUX 165.3SQ Uranium Series 3-Way Crossover. Includes wiring diagrams for standard and semi-active setups, jumper settings for level adjustment, and technical specifications.
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
This manual provides instructions for the installation and configuration of the Ground Zero GZUX 165.3SQ 3-way crossover. It covers standard wiring, semi-active wiring configurations, and how to adjust tweeter and midrange levels using the integrated jumpers. Always ensure the system is powered off during installation.
Product Overview
The GZUX 165.3SQ is a passive 3-way crossover from the Uranium Series, designed for high-quality audio systems. Key features include:
- 3-way passive crossover design
- 12/6 dB/oct crossover slope
- 3-step adjustable tweeter level
- 3-step adjustable midrange level
- Selectable semi-active use
- Gold-plated terminals
- GZ-design housing
Technical Specifications
The following specifications apply to the GZUX 165.3SQ:
- Power Handling: 160 Watts RMS
- Crossover Slope: 12/6 dB/oct
- High Pass Filter: 4500 Hz @ 12 dB/oct
- Band Pass Filter: HPF 450 Hz / LPF 4500 Hz @ 6/12 dB/oct
- Low Pass Filter: 450 Hz @ 12 dB/oct (6 dB/oct if WF jumper is in OFF position)
Wiring and Installation
Standard Wiring: Connect the amplifier output to the crossover input (IN). Connect the tweeter to the TW output, the midrange to the MID output, and the woofer to the WF output.
Semi-Active Wiring: This configuration requires a 4-channel amplifier with an integrated active crossover. The woofer is connected directly to a separate amplifier channel. The crossover handles only the midrange and tweeter. Important: You must set the WF jumper on the crossover to the OFF position when using this configuration to ensure proper operation.
Setup and Adjustments
The crossover allows for fine-tuning of the sound output via jumpers:
- Tweeter Level Adjustment: Use the jumper on the crossover to select the desired tweeter level (+2 dB, 0 dB, -2 dB).
- Midrange Level Adjustment: Use the jumper on the crossover to select the desired midrange level (+1 dB, 0 dB, -2 dB).
- WF Jumper: Must be set to ON for standard 3-way operation. Must be set to OFF for semi-active operation where the woofer is driven by a separate amplifier.
Safety Instructions
To ensure safety and longevity of the equipment:
- Keep all parts and packaging away from children and pets to avoid suffocation.
- Avoid prolonged exposure to high volume levels (over 85 dB) to prevent permanent hearing damage.
- High-power music systems can reach levels of 130 dB or more, which can distract from traffic and hinder the perception of important road noises.
- Ground Zero GmbH assumes no responsibility for damage resulting from improper installation or use under competitive conditions.
- Dispose of components at a local recycling facility; do not discard with normal household waste.
Manufacturer information
Ground Zero Audio
Practical help
Common problems
Woofer not producing sound in semi-active mode
Ensure the WF jumper on the crossover is set to the OFF position.
Tweeter or midrange volume is too high or low
Adjust the jumper position on the crossover to the required level setting.
Before use
- Verify the amplifier power handling matches the 160W RMS rating.
- Ensure all connections are secure and terminals are clean.
- Determine if you are using a standard or semi-active configuration.
- Set the WF jumper correctly based on your chosen configuration.
- Ensure the system is powered off before making any wiring changes.
Specs in practice
- Power Handling
- 160 Watts RMS; the continuous power the crossover can handle.
- Crossover Slope
- 12/6 dB/oct; determines the steepness of the frequency cutoff.
- High Pass Filter
- 4500 Hz @ 12 dB/oct; protects the tweeter from low frequencies.
Images and diagrams
- Standard Wiring: Connects the amplifier input to the crossover, which then splits the signal to the tweeter, midrange, and woofer.
- Semi-Active Wiring: The woofer is connected to a separate amplifier channel, and the crossover handles only the midrange and tweeter.
Model compatibility
- Designed for use with Ground Zero Uranium Series components.
- Semi-active mode requires a 4-channel amplifier with an integrated active crossover.
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.