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The Ground Zero GZRF 4.0SQX is a 4 inch (100 mm) 2-way coaxial car speaker rated at 70W RMS (110W max) at 3 ohms. An aluminium cone and 25 mm silk dome tweeter make it a compact sound-quality upgrade for factory 4 inch locations.
Key specifications
- Size: 100 mm / 4 inch
- Type: 2-way coaxial
- Power handling: 70W RMS / 110W max
- Impedance: 3 ohms
- Efficiency: 90 dB
- Frequency response: 70 Hz to 24 kHz
- Tweeter: 25 mm / 1 inch silk dome
- Mounting diameter: 93 mm / 3.66 inch
- Mounting depth: 47 mm / 1.85 inch
GZRF 4.0SQX: 100 mm / 4″ 2-way coaxial speaker system
A compact 4″ coaxial speaker built for clean output and durability, with a 3 ohm design that makes the most of your amplifier's power.
Features
- 2-way coaxial speaker system
- Aluminium cone
- Rubber surround
- Conex® spider
- Resonance free steel basket
- High efficient 3 ohms version
- 25 mm / 1″ silk dome tweeter
- Ferrite motor
- Tweeter and overload protection
- Incl. protection grill
Explore the full range in Ground Zero.
Specification
| Model | 2-way coaxial speakers |
|---|---|
| Diameter | 100 mm / 3.94″ |
| Power handling | (RMS/max.) 70 / 110 Watts |
| Impedance | 3 ohms |
| Efficiency | 90 dB |
| Frequency Response | 70 Hz – 24 kHz |
| Tweeter | 25 mm / 1″ silk dome |
| Mounting Ø | 93 mm / 3.66″ |
| Mounting depth | 47 mm / 1.85″ |
| Crossover | 6 dB/oct – high pass filter |
What's Included
- GZRF 4.0SQX
Ground Zero
About the Ground Zero GZRF 4.0SQX
From our tech experts at CEN
Ground Zero 4 inch coaxial speakers, rated at 70w RMS.
Who it suits
Drivers replacing tired factory speakers who want a clear improvement.
Our tech experts advise
Sizes, adapter rings and harnesses vary by vehicle, year and trim, so we confirm what your car takes before ordering rather than guessing. Door treatment matters as much as the speaker, and these repay an amplifier. Installation is priced per vehicle, so get in touch with your make, model and year and we will confirm what it needs. See car audio installation.
Explore the full Ground Zero range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Ground Zero
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Frequently Asked Questions
Q: How do I choose the right amplifier for my speakers or subwoofer?
A: Match the amplifier's RMS output per channel to the RMS handling of your speakers or subwoofer at the same impedance. The Specification tab lists the power figures. If in doubt, contact CEN with your setup and we will recommend a match.
Q: What cutout and depth does the GZRF 4.0SQX need?
A: It needs a 93 mm (3.66 inch) mounting diameter and 47 mm (1.85 inch) of mounting depth.
Q: Does the GZRF 4.0SQX have tweeter protection?
A: Yes. It has tweeter and overload protection, and its crossover is a 6 dB/oct high pass filter.
Q: Can CEN fit these speakers for me?
A: Yes. CEN offers professional installation from our Nottingham premises. Contact us to book an installation slot or ask for a fitting quote.
