Ground Zero Hydrogen GZHA Mini Four 4 Channel Class D Amplifier 320w RMS
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The Ground Zero Hydrogen GZHA Mini Four is a compact 4-channel Class D car amplifier rated at 4 x 80W RMS into 4 ohms (320W RMS total) and 4 x 130W RMS into 2 ohms. It belongs to the Hydrogen range from Ground Zero.
Key specifications
- Channels: 4, Class D
- Output at 4 ohm: 4 x 80W RMS
- Output at 2 ohm: 4 x 130W RMS
- Bridged at 4 ohm: 2 x 260W RMS
- Maximum output: 640W
- Frequency response: 5 Hz – 38 kHz
- Crossover: variable HPF / LPF / BPF
- Inputs: high-level with auto-on
- Dimensions (W x L x H): 135 x 210 x 52 mm
4-channel Class D compact amplifier
A compact 4-channel Class D amplifier delivering 320W RMS, built for tight installs without sacrificing sound quality or control. If you need a little more power, Ground Zero also offer the GZRA 65.4-MICRO 4-channel Class D amplifier at 300W as an alternative compact option.
Features
- Compact 4-channel amplifier
- SMD components for reliable, space-saving construction
- Class D technology for efficient power delivery
- Variable active crossover, bass boost and phase shift for precise tuning
- Socket for wired level remote control
- Stabilised power supply for consistent output
- Large terminals for straightforward wiring
- Solid heatsink with engraved Ground Zero lettering
- High-level input with auto-on function — works without a remote turn-on wire
Explore the full range in Ground Zero Hydrogen.
Specification
| Model | Compact class D amplifier |
|---|---|
| Channels | 4 |
| Output Power (@ 4Ω) | 4x 80 Watts RMS |
| Output Power (@ 2Ω) | 4x 130 Watts RMS |
| Max. Output Power | 640 Watts |
| Output Power (@ 4Ω) bridged | 2x 260 Watts RMS |
| Frequency Response | 5 Hz – 38 kHz |
| Dimensions | (W x L x H) 135mm x 210mm x 52 mm |
More specs
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What's Included
- GZHA MINI FOUR
Ground Zero
About the Ground Zero GZHA MINI FOUR
From our tech experts at CEN
A 4-channel amplifier from Ground Zero, Class D, rated at 320w.
Who it suits
Drivers who have upgraded their speakers and found the head unit cannot drive them properly. 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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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
More from Ground Zero Hydrogen
More options from the same range, in stock and ready to go
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: Does the GZHA Mini Four need a remote turn-on wire?
A: Not when you use the high-level input. Its auto-on function switches the amplifier on from the speaker-level signal, so it works without a remote turn-on wire.
Q: Can the GZHA Mini Four be bridged?
A: Yes. Bridged into 4 ohms it delivers 2 x 260W RMS.
Q: How big is the GZHA Mini Four?
A: It measures 135 x 210 x 52 mm (W x L x H), compact enough for tight installs.
Q: Can I add a level remote to the GZHA Mini Four?
A: Yes. It has a socket for a wired level remote control.
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