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The Ground Zero Iridium GZIW 250 is a 10 inch (25 cm) 4 ohm car subwoofer rated at 250W RMS, with a 3D HQPP cone and 50 mm copper voice coil for accurate, controlled bass.
Other sizes in the Iridium subwoofer range: GZIW 165 6.5 inch, GZIW 200 8 inch, GZIW 300 12 inch.
Key specifications
- Size: 10″ / 25 cm
- Power handling: 250W RMS
- Recommended amplifier power: 200 – 300W
- Impedance: 4 ohm
- Sensitivity: 87 dB
- Voice coil: 50 mm / 2″ copper
- Xmax: 25 mm / 0.98″
- Mounting depth: 129 mm / 5.08″
- Resonance frequency (Fs): 27 Hz
25 cm / 10″ high quality subwoofer
A well-built 10″ subwoofer from Ground Zero's Iridium range, delivering 250w RMS at 4 ohm with precision-engineered components for accurate, controlled bass.
Features
- 10″ subwoofer
- Klippel® optimized
- 3D HQPP cone
- Long stroke rubber surround
- Solid aluminum cast basket
- 50 mm / 2″ copper voice coil
- Polycot spider
- IMPP dust cap with 3D structure logo
Explore the full range in Ground Zero.
Specification
| Model | High-Quality subwoofer |
|---|---|
| Diameter | 25 cm / 10″ |
| Power Handling | (RMS) 250 Watts |
| Impedance | 4 Ohms |
| Efficiency | 87 dB |
| Power recommendation | 200 – 300 Watts |
| Voice coil | 50 mm / 2″ copper |
| Membrane | HQPP cone with 3D-structure |
| Max. Excursion (Xmax) | 25 mm / 0.98″ |
| Mounting depth | 129 mm / 5.08″ |
| Resonance frequency (Fs) | 27 Hz |
| Overall quality (Qts) | 0.44 |
| Equiv. air volume (Vas) | 49.3 L / 1.74 cu.ft. |
What's Included
- GZIW 250
Ground Zero
About the Ground Zero GZIW 250
From our tech experts at CEN
A Ground Zero 10 inch subwoofer, 4 ohm, handling 250w 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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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 much amplifier power does the GZIW 250 need?
A: It is rated at 250W RMS, and Ground Zero recommends an amplifier delivering 200 to 300 watts into 4 ohms.
Q: How deep is the GZIW 250?
A: It needs 129 mm of mounting depth.
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.
