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The Ground Zero GZRW 300-D2 FLAT is a 12″ (30 cm) shallow-mount car subwoofer rated at 450W RMS, with dual 2 ohm voice coils and a mounting depth of just 93 mm. It is part of Ground Zero's GZRW range, designed for installs where boot space or depth is limited.
Key specifications
- Size: 12″ / 30 cm
- Power handling: 450W RMS
- Recommended amplifier power: 200 – 800W
- Impedance: 2 x 2 ohm (dual voice coil)
- Sensitivity: 84 dB
- Mounting depth: 93 mm / 3.66″
- Mounting diameter: 278 mm / 10.94″
- Voice coil: 50 mm / 2″ copper
- Xmax: 30 mm / 1.18″
30 cm / 12″ shallow-mount subwoofer
At just 93 mm deep, the GZRW 300-D2 FLAT fits where a standard subwoofer won't — under-seat, in a shallow enclosure, or in a boot build where depth is at a premium. It handles 450W RMS and accepts up to 800W from your amplifier.
Features
- 12″ flat shallow-mount design
- Efficient ferrite motor
- Paper sandwich cone
- Durable rubber surround
- Shallow GZ-design steel basket
- 50 mm / 2″ copper voice coil
- Polycot spider
- Aluminium dust cap
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Specification
| Model | High-Quality SPL Subwoofer |
|---|---|
| Diameter | 30 cm / 12″ |
| Power handling | (RMS) 450 Watts |
| Impedance | 2x2 Ohms |
| Efficiency | 84 dB |
| Power recommendation | 200 – 800 Watts |
| Voice coil | 50 mm / 2″ copper |
| Cone | Paper sandwich cone |
| Max. Excursion (Xmax) | 30 mm / 1.18″ |
| Mounting diameter | 278 mm / 10.94″ |
| Mounting depth | 93 mm / 3.66″ |
| Resonance frequency (Fs) | 23.5 Hz |
| Damping ratio (Qts) | 0.44 |
| Equiv. air volume (Vas) | 60,2 L / 2.13 cu.ft. |
What's Included
- GZRW 300-D2 FLAT
Ground Zero
About the Ground Zero GZRW 300-D2 FLAT
From our tech experts at CEN
A Ground Zero 12 inch subwoofer, handling 450w RMS.
Who it suits
Drivers building a system where the bass keeps pace with the front stage, and competition builds where output is the point.
Our tech experts advise
Enclosure volume and tuning decide most of what you hear. We build enclosures to suit both driver and vehicle at our Beeston workshop. 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.
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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
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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 shallow is the GZRW 300-D2 FLAT?
A: It needs a mounting depth of 93 mm (3.66 inches) and a 278 mm mounting diameter, so it suits shallow enclosures and installs where depth is limited.
Q: What impedance is the GZRW 300-D2 FLAT?
A: It has dual 2 ohm voice coils (2 x 2 ohm). Wired in series they present a 4 ohm load and in parallel a 1 ohm load, so you can match the load your amplifier is stable at.
Q: How much amplifier power does the GZRW 300-D2 FLAT need?
A: It is rated at 450W RMS, and Ground Zero recommends an amplifier delivering 200 to 800 watts.
Q: Can CEN fit this subwoofer for me?
A: Yes. CEN offers professional subwoofer and amplifier installation from our Nottingham premises. Contact us to book an installation slot or ask for a fitting quote.
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