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The Ground Zero GZRA 450.1-MICRO is an ultra-compact Class D mono subwoofer amplifier delivering 480W RMS at 1 ohm, 310W at 2 ohms and 180W at 4 ohms. It has a variable active crossover, bass boost, high-level inputs with auto-on and an included bass remote, and is small enough to fit under a seat.
Key specifications
- Channels: 1 (mono), Class D
- Output at 4 ohms: 180W RMS
- Output at 2 ohms: 310W RMS
- Output at 1 ohm: 480W RMS
- Max output (CEA-2006A / 10% THD+N): 640W
- Frequency response: 10 to 250 Hz
- Inputs: RCA and high-level with auto-on
- Bass remote: included
- Dimensions: 82 x 142 x 40 mm (3.23 x 5.59 x 1.57 inch)
Need more power? The GZRA 700.1-MICRO delivers 700W RMS at 1 ohm in a similar compact format.
GZRA 450.1-MICRO: micro subwoofer amplifier
The Ground Zero GZRA 450.1-MICRO is an ultra-compact mono subwoofer amplifier designed to deliver solid power in a minimal footprint. Its Class D technology and surface-mount components ensure discreet integration under a seat or in the boot, with 480W RMS into 1 ohm to effectively drive your subwoofer. The variable active crossover and bass boost allow for precise tuning, while the included bass remote lets you control the sound from your seat.
Features
- Micro subwoofer amplifier
- SMD components
- Class D technology
- Variable active crossover and bass boost
- Stable power supply
- Compact heatsink with engraved Ground Zero lettering
- Bass remote control included
- High-level input with auto-on function
Explore the full range in Ground Zero.
Specification
| Type | Class D mono amplifier |
|---|---|
| Channels | 1 |
| Output Power (@ 4Ω) | 180 Watts RMS |
| Output Power (@ 2Ω) | 310 Watts RMS |
| Output power (@ 1Ω) | 480 Watts RMS |
| Input sensitivity RCA / high-level | 0.4 – 8.3 V / 1.3 – 25 V |
| Frequency Response | 10 – 250 Hz |
| Subsonic / LPF / BPF | Yes / Yes / Yes |
| Bass Boost / Phase Shift | Yes / No |
| High level input / Auto-on | Yes / Yes |
| Remote Control | included |
| BIAS Setting | No |
| Linkmode | No |
| Dimensions | (w x l x h) 82 x 142 x 40 mm / 3.23″ x 5.59″ x 1.57″ |
More specs
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What's Included
- GZRA 450.1-MICRO
Ground Zero
About the Ground Zero GZRA 450.1-MICRO
From our tech experts at CEN
A monoblock subwoofer amplifier from Ground Zero, Class D.
Who it suits
Anyone adding a subwoofer that needs real power behind it. Ground Zero is a German brand with a strong following in competition and SPL circles, and the amplifiers reflect that.
Our tech experts advise
Matching matters more than headline watts, and gains want setting with a meter rather than by ear. It needs a fused feed from the battery on the correct cable gauge. 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: What wiring do I need to install this amplifier?
A: You will need an amplifier wiring kit sized to the amplifier's power draw, typically including power and earth cable, a fuse, RCA leads and a remote wire. CEN stocks complete wiring kits, and the amplifier's fuse rating is the guide to the cable gauge required.
Q: What class of amplifier is this and does it matter?
A: Class D amplifiers are compact and efficient, ideal for subwoofers and modern installs. Class AB designs are traditionally favoured for outright sound quality on mid and high frequencies. The class is listed in the Specification tab where provided.
Q: Will an amplifier work with my factory head unit?
A: Yes, in most cases. If your head unit has no RCA outputs you will need a line output converter to feed the amplifier a clean signal. CEN stocks line output converters and can advise the right one for your vehicle.
Q: Can CEN install this amplifier?
A: Yes. CEN offers professional amplifier installation from our Nottingham premises, including secure mounting, wiring and setup. Contact us to book.
Q: How much power does the GZRA 450.1-MICRO produce?
A: It delivers 180W RMS at 4 ohms, 310W RMS at 2 ohms and 480W RMS at 1 ohm, with a maximum output of 640W (CEA-2006A / 10% THD+N).
Q: Can the GZRA 450.1-MICRO connect to a factory head unit without RCA outputs?
A: Yes. It has a high-level (speaker level) input with auto-on, so it can take its signal from factory speaker wires without a separate line output converter. RCA input sensitivity is 0.4 to 8.3V and high-level is 1.3 to 25V.
Q: How big is the GZRA 450.1-MICRO?
A: It measures 82 x 142 x 40 mm (3.23 x 5.59 x 1.57 inch), small enough to fit under a seat or in a tight space in the boot.
