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The Ground Zero GZRW 250-D2 FLAT is a 10″ (25 cm) shallow-mount car subwoofer rated at 400W RMS, with dual 2 ohm voice coils and an 85 mm mounting depth. It is part of Ground Zero's GZRW flat subwoofer range.
Key specifications
- Size: 25 cm / 10″, shallow-mount
- Power handling: 400W RMS
- Impedance: 2x2 ohms (dual voice coil)
- Recommended amplifier power: 200–800W
- Efficiency: 84 dB
- Voice coil: 50 mm / 2″ copper
- Xmax: 22 mm / 0.87″
- Mounting depth: 85 mm / 3.35″
- Mounting diameter: 232 mm / 9.13″
GZRW 250-D2 FLAT: 25 cm / 10″ high quality SPL subwoofer
A 400W RMS, dual 2 ohm shallow subwoofer built for tight spaces where a standard driver won't fit. If you have more room available, Ground Zero also offer the GZIW 250 10″ 4 ohm subwoofer as an alternative.
Features
- 10″ flat subwoofer designed for shallow mounting depths
- Efficient ferrite motor
- Paper sandwich cone for low weight and solid output
- Durable rubber surround for long-term reliability
- Shallow GZ-design steel basket
- 50 mm / 2″ copper voice coil
- Polycot spider
- Aluminium dust cap
Explore the full range in Ground Zero Radioactive.
Specification
| Model | High-Quality SPL Subwoofer |
|---|---|
| Diameter | 25 cm / 10″ |
| Power handling | (RMS) 400 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) | 22 mm / 0.87″ |
| Mounting diameter | 232 mm / 9.13″ |
| Mounting depth | 85 mm / 3.35″ |
| Resonance frequency (Fs) | 28 Hz |
| Damping ratio (Qts) | 0.54 |
| Equiv. air volume (Vas) | 35.8 L / 1.26 cu.ft. |
What's Included
- GZRW 250-D2 FLAT
Ground Zero
About the Ground Zero GZRW 250-D2 FLAT
From our tech experts at CEN
A Ground Zero 10 inch subwoofer, handling 400w 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.
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
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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 250-D2 FLAT?
A: It needs just 85 mm (3.35 inch) of mounting depth with a 232 mm (9.13 inch) mounting diameter.
Q: Can the GZRW 250-D2 FLAT be wired to 1 ohm or 4 ohm?
A: Yes. The GZRW 250-D2 FLAT has dual 2 ohm voice coils (2x2 ohms), so it can be wired in parallel for a 1 ohm load or in series for a 4 ohm load. Choose the wiring to suit the stable load of your amplifier. Ground Zero recommends 200 to 800W of amplifier power.
Q: What are the Thiele/Small parameters of the GZRW 250-D2 FLAT?
A: Fs is 28 Hz, Qts is 0.54 and Vas is 35.8 litres (1.26 cu.ft). Xmax is 22 mm.
Q: Can CEN fit this subwoofer for me?
A: Yes. CEN offers professional installation from our Nottingham premises, including enclosure, amplifier and wiring. Contact us to book or ask for a quote.
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