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The Ground Zero GZRC 165.2SQX-IV is a 6.5 inch (165 mm) 2-way SQ component speaker kit rated at 120W RMS (190W max) at 3 ohms. It pairs the GZRK 165SQX black anodised aluminium midwoofer with the GZRT 25SQ tweeter for efficient, sound-quality focused front staging.
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: 12/12 dB/oct at 4600 Hz
- Mounting depth: 68 mm / 2.68 inch
- Mounting diameter: 142.5 mm / 5.61 inch
Also available: the GZRC 165.2SQX version with a 2-way passive crossover and 12/18 dB/oct slopes. The midwoofer is also sold on its own as the GZRK 165SQX.
GZRC 165.2SQX-IV: 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 power handling up to 120w.
Features
- 2-way SQ component speaker system
- Black anodised aluminium cone
- Rubber surround
- Conex spider
- Resonance free steel basket
- High efficient 3 ohms version
- GZRT 25SQ Tweeter
- Ferrite motor
- Separated high pass and low pass filter
- Incl. protection grill
Explore the full range in Ground Zero.
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 | 12/12 dB/Oct |
| Crossover frequency | 4600 Hz |
What's Included
- GZRC 165.2SQX-IV
Ground Zero
About the Ground Zero GZRC 165.2SQX-IV
From our tech experts at CEN
Ground Zero 6.5 inch component speakers, with separate tweeters for mounting where you will actually hear them, rated at 120w RMS.
Who it suits
Drivers building a proper front stage and happy for tweeters to be mounted separately, which usually means a professional fit.
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: Why is the GZRC 165.2SQX-IV 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-IV use?
A: It uses a passive crossover with 12/12 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-IV 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.
