Couldn't Load Pickup availability
GZIA 135.4
4-channel high quality class A/B amplifier
A solid 4-channel Class A/B amplifier from Ground Zero, rated at 560w. Built for real-world installs with a black anodized heatsink, integrated active crossover, and high-level input for easy head unit connection.
Features
- 4-channel amplifier
- Class AB technology
- Variable active crossover and bass boost
- Stable power supply
- Large terminals
- Black anodized heatsink with Ground Zero lettering
- High-level input with auto-on function
Explore the full range in Ground Zero.
Specification
| Model | High-Quality Class A/B amplifier |
|---|---|
| Channels | 4 |
| Output Power (@ 4Ω) | 4x 100 Watts RMS |
| Output Power (@ 2Ω) | 4x 140 Watts RMS |
| Output Power (@ 4Ω) bridged | 2x 280 Watts RMS |
| Frequency Response | 8 Hz – 28 kHz |
| HPF / LPF / BPF | Yes / Yes / No |
| Bass Boost / Phase switch | Yes / No |
| High level input / Auto-on | Yes / Yes |
| Remote | No |
| BIAS Setting | No |
| Linkmode | No |
| Dimensions | (W x L x H) 168 x 49 x 278 mm / 6.61″ x 1.93″ x 10.94″ |
More specs
| |
What's Included
- GZIA 135.4
Ground Zero
About the Ground Zero GZIA 135.4
From our tech experts at CEN
A 4-channel amplifier from Ground Zero, Class AB, rated at 560w.
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
Recommended For You
Discover more top-rated gear, handpicked to go with what you're viewing
Looking for Installation?
At CEN we take pride in being able to share the quality of our work as well as being able to show what incredible products we have installed week on week.
More from Ground Zero
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.
