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The Ground Zero GZRC 165.2SQX is a 6.5″ (165 mm) 2-way SQ component speaker kit rated at 120W RMS / 190W max at 3 ohms, from Ground Zero's GZRC range. It pairs the GZRK 165SQX black anodised aluminium midwoofer with the GZRT 25SQ tweeter in a sound-quality focused front-stage kit.
Also available: the GZRC 165.2SQX-IV version with separated high pass and low pass filters and 12/12 dB/oct slopes. The midwoofer is also sold on its own as the GZRK 165SQX.
If you need a step-down option, the Ground Zero GZTC 165.2X is a 6.5″ 2-way component kit rated at 100W.
Key specifications
- Size: 165 mm / 6.5 inch
- Type: 2-way SQ component
- Power handling: 120W RMS / 190W max
- Impedance: 3 ohms
- Efficiency: 90 dB
- Frequency response: 45 Hz to 25 kHz
- Crossover: 12/18 dB/oct at 4600 Hz
- Mounting depth: 68 mm / 2.68 inch
- Mounting diameter: 142.5 mm / 5.61 inch
GZRC 165.2SQX: 165 mm / 6.5″ 2-way SQ component speaker system
A 6.5″ component kit built for sound quality, with a black anodised aluminium cone and 3 ohm impedance for efficient use with low-powered head units or amplifiers.
Features
- 2-way SQ component speaker system
- Black anodised aluminium cone
- Rubber surround
- Nomex spider
- Resonance-free steel basket
- High-efficiency 3 ohm design
- GZRT 25SQ tweeter included
- Ferrite motor
- 2-way passive crossover
- Protection grille included
Explore the full range in Ground Zero Radioactive.
Specification
| Model | 2-way SQ component speakers |
|---|---|
| Diameter | 165 mm / 6.5″ |
| Power handling | (RMS/max.) 120 / 190 Watts |
| Impedance | 3 ohms |
| Efficiency | 90 dB |
| Frequency Response | 45 Hz – 25 kHz |
| Tweeter | GZRT 25SQ |
| High performance midwoofer | GZRK 165SQX |
| Mounting Ø | 142.5 mm / 5.61″ |
| Mounting depth | 68 mm / 2.68″ |
| Crossover | 12/18 dB/Oct |
| Crossover frequency | 4600 Hz |
What's Included
- GZRC 165.2SQX
Ground Zero
About the Ground Zero GZRC 165.2SQX
From our tech experts at CEN
The Ground Zero GZRC 165.2SQX is a 6.5″ 2-way SQ component speaker kit rated at 120W RMS and 190W max, with a 3 ohm impedance. It pairs the GZRK 165SQX black anodised aluminium midwoofer with the GZRT 25SQ tweeter and a 2-way passive crossover. The 3 ohm design delivers 90 dB efficiency, making it suited to both head unit and amplifier use.
Who it suits
This kit suits drivers who want a sound quality front stage in a standard 6.5″ door location. The separate tweeter allows flexible placement for better stereo imaging. For a version with separated high-pass and low-pass filters, consider the GZRC 165.2SQX-IV.
Our tech experts advise
Check the door cavity allows at least 68mm mounting depth and a 142.5mm cut-out before ordering. The 3 ohm impedance is compatible with most standard head units and amplifiers. The GZRK 165SQX midwoofer is also sold separately if needed. Professional fitting is priced per vehicle — visit our car audio installation page for details.
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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.
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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: Why is the GZRC 165.2SQX 3 ohms?
A: The 3 ohm impedance draws more power from a head unit or amplifier than a 4 ohm speaker, which makes the kit more efficient with lower-powered sources.
Q: What crossover does the GZRC 165.2SQX use?
A: It uses a passive crossover with 12/18 dB/oct slopes and a 4600 Hz crossover frequency between the GZRK 165SQX midwoofer and GZRT 25SQ tweeter.
Q: What mounting depth does the GZRC 165.2SQX need?
A: The midwoofer needs 68 mm (2.68 inch) of mounting depth and a 142.5 mm (5.61 inch) mounting diameter.
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.
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