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The Ground Zero GZTF 6.5X is a 6.5 inch (165 mm) 2-way coaxial car speaker rated at 90W RMS (130W max), with a structured HQPP cone, 13 mm Mylar tweeter and Euro-DIN basket. Its 3 ohm design makes it easy to drive from most head units.
Other sizes in the GZTF range: GZTF 4.0X 4 inch, GZTF 5.2X 5 inch, GZTF 69X 6x9 inch.
Key specifications
- Size: 165 mm / 6.5″
- Power handling: 90W RMS, 130W max
- Impedance: 3 ohm
- Sensitivity: 91 dB
- Frequency response: 50 Hz – 22 kHz
- Tweeter: 13 mm / 0.51″ Mylar
- Mounting diameter: 143.5 mm / 5.65″
- Mounting depth: 67 mm / 2.64″
165 mm / 6.5″ 2-way coaxial speaker system
A solid upgrade for factory speaker positions. The GZTF 6.5X delivers 90w RMS through a structured HQPP cone and 3-ohm impedance, making it easy to drive from most head units.
Features
- 2-way coaxial speaker system
- HQPP cone with 3D structure
- Rubber surround
- Euro-DIN basket
- Resonance free steel basket
- High efficient 3 ohms version
- 13 mm / 0.51″ Mylar tweeter
- Ferrite motor
- 6 dB/oct high pass filter
- Incl. protection grill
Explore the full range in Ground Zero.
Specification
| Model | 2-way coaxial speakers |
|---|---|
| Diameter | 165 mm / 6.50″ |
| Power handling | (RMS/max.) 90 / 130 Watts |
| Impedance | 3 ohms |
| Efficiency | 91 dB |
| Frequency Response | 50 Hz – 22 kHz |
| Tweeter | 13 mm / 0.51″ Mylar tweeter |
| Cone | HQPP cone with 3D structure |
| Mounting Ø | 143.5 mm / 5.65″ |
| Mounting depth | 67 mm / 2.64″ |
What's Included
- GZTF 6.5X
Ground Zero
About the Ground Zero GZTF 6.5X
From our tech experts at CEN
Ground Zero 6.5 inch coaxial speakers, rated at 90w 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: How deep is the GZTF 6.5X?
A: It needs 67 mm of mounting depth and a 143.5 mm mounting diameter, in a Euro-DIN basket.
Q: Will the GZTF 6.5X run from my head unit?
A: Yes. Its high-efficiency 3 ohm design and 91 dB sensitivity make it easy to drive from most head units. An amplifier lets it use its full 90W RMS rating.
Q: Is a grille included with the GZTF 6.5X?
A: Yes, a protection grille is included.
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.














































