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The Ground Zero GZFC 165.2 is a 165 mm / 6.5″ 2-way component speaker kit rated at 100 W RMS, from the Ground Zero Ferrum range. It is designed as a direct upgrade over factory speakers and is compatible with most OEM and aftermarket head units.
This listing is the GZFC 165.2 at 100 W RMS. The Ground Zero 6.5″ 2-way component kit is also available as the Ground Zero GZIC 165.2SPL at 120 W RMS.
Key specifications
- Size: 165 mm / 6.5″
- Configuration: 2-way component system
- RMS power handling: 100 W
- Impedance: 4 ohm
- Tweeter: 19 mm soft dome
- Crossover: 12 dB/oct high-pass, included
- Basket: Euro-DIN resonance-free steel
- Range: Ground Zero Ferrum
GZFC 165.2 165 mm / 6.5″ 2-way component speaker system
The GZFC 165.2 delivers balanced, clean and dynamic sound that will outperform factory speakers. The lightweight HQPP cone ensures fast response and accurate midrange, while the 19 mm soft dome tweeter produces smooth, detailed highs. The 4 ohm impedance makes it compatible with most OEM and aftermarket car stereos.
A resonance-free Euro-DIN steel basket and high-quality rubber suspension provide long-term stability and performance. The included 12 dB/oct high-pass crossover ensures clean band separation and a balanced sound image.
Features
- 2-way SPL component speaker system
- HQPP cone with 3D structure
- High-roll rubber surround
- Euro-DIN basket
- Resonance-free steel basket
- High-efficiency 3 ohm design
- 25 mm / 1″ Mylar dome tweeter
- Ferrite motor
- 12 dB/oct high-pass filter
- Includes hexagon-style protection grille
Explore the full range in Ground Zero.
Specification
| Model | 2-way component speakers |
|---|---|
| Diameter | 165mm / 6.5″ |
| Power handling | (RMS/max.) 100 / 150 Watts |
| Impedance | 4 Ohms |
| Efficiency | 91 dB |
| Frequency Response | 50 Hz – 20 kHz |
| Tweeter | 19mm / 0.75″ soft dome |
| Cone | HQPP |
| Mounting Diameter | 143.5mm / 5.65″ |
| Mounting depth | 60mm / 2.36″ |
| Crossover | 12 dB/oct – high pass filter |
| Crossover frequency | 5000 Hz |
What's Included
- GZFC 165.2
Ground Zero
About the Ground Zero GZFC 165.2
From our tech experts at CEN
The Ground Zero GZFC 165.2 is a 6.5″ (165 mm) 2-way component speaker kit from the Ferrum range, rated at 100 W RMS and 150 W peak. It includes a 19 mm soft dome tweeter, an HQPP cone woofer and a 12 dB/oct high-pass crossover set at 5,000 Hz. The 4 ohm impedance suits most OEM and aftermarket head units.
Who it suits
This kit suits drivers wanting a clear step up from factory speakers without adding an amplifier. At 91 dB efficiency and 4 ohm, it runs directly from a standard head unit. Those wanting more power may prefer the Ground Zero GZRC 165.2SQX 6.5″ 2 Way Component Kit 120w.
Our tech experts advise
Before buying, check your door has at least 143.5 mm mounting diameter and 60 mm mounting depth. Component kits need separate tweeter mounting locations, so plan positions before installation. Fitting cost varies by vehicle — see our car audio installation page for details.
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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Have it Fitted By Our Team
Our team fits car audio, stereos, dash cams and vehicle security at our workshop in Beeston, Nottingham. Tell us your vehicle and we'll confirm the parts and a fitted price.
- 1
Tell us your vehicle
Make, model and year, and what you'd like fitted.
- 2
We confirm the parts
Fascia, wiring and interfaces checked for your car, with a fitted price.
- 3
Fitted at our workshop
Bring it to our Beeston workshop and we do the rest.
Unit 25 Technology Drive, Beeston, Nottingham NG9 1LA
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: Why is the GZIC 165.2SPL 3 ohms?
A: The 3 ohm design is a high efficiency version: a lower impedance draws more power from the same amplifier than a 4 ohm speaker would.
Q: What mounting depth does the GZIC 165.2SPL need?
A: The 6.5 inch midwoofer needs a mounting depth of 68 mm and a 142.5 mm cutout. The tweeter needs a 48 mm cutout and 16 mm depth.
Q: How much power does the GZIC 165.2SPL handle?
A: It is rated at 120W RMS and 200W SPL, with 89 dB efficiency.
Q: What size is the GZIC 165.2SPL tweeter?
A: It uses the GZCT 25M-SPL tweeter with a 25 mm (1 inch) Mylar dome. The tweeter housing is 54 mm in diameter and needs a 48 mm cutout and 16 mm mounting depth.
Q: Can CEN fit these speakers for me?
A: Yes. CEN offers professional speaker installation from our Nottingham premises. Contact us to book an installation slot or ask for a fitting quote.
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