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The Ground Zero GZCS SW-800A is an 8″ (20 cm) flat active underseat subwoofer with a built-in 120W RMS / 180W max amplifier, housed in die-cast aluminium. It is part of the Ground Zero GZCS range.
This listing is the 8″ version. The GZCS underseat subwoofer is also available in a 10″ 150W RMS model (GZCS SW-1000A).
Key specifications
- Subwoofer: 20 cm / 8″, flat
- Installation: under seat
- Amplifier power: 120W RMS, 180W max
- Frequency response: 30 – 150 Hz
- Low-pass filter: 45 – 150 Hz
- Phase setting: 0° / 180°
- Inputs: high level with automatic turn-on
- Housing: die-cast aluminium
- Dimensions: 315 x 235 x 80 mm (W x L x H)
GZCS SW-800A: 20 cm / 8″ flat active subwoofer
The GZCS SW-800A fits under most seats and adds genuine bass depth without taking up boot space. Its integrated 120W RMS / 180W max amplifier delivers dynamic low-end, while the die-cast aluminium casing keeps heat dissipation in check for long-term reliability.
The adjustable low-pass filter (45–150 Hz) and phase correction (0°/180°) let you tune the bass to suit your system. High-level inputs and automatic turn-on make it straightforward to integrate with factory or aftermarket head units.
Features
- Flat under-seat enclosure with integrated amplifier and 8″ subwoofer
- 120W RMS / 180W max amplifier
- Die-cast aluminium housing
- High-level input
- Automatic turn-on function
- Adjustable low-pass filter
- Phase correction (0° / 180°)
- Includes remote control
- Includes wiring kit
Explore the full range in Ground Zero Active Subwoofers.
Specification
| Model | Active Subwoofer Box |
|---|---|
| Diameter | 20 cm / 8″ |
| Amplifier Power (RMS/max.) | 120 / 180 Watts |
| Version | Underseat mounting |
| Frequency Response | 30 – 150 Hz |
| Low Pass Filter | 45 – 150 Hz |
| Phase Setting | 0° / 180° |
| Housing | Cast aluminum |
| Dimensions | (W x L x H) 315 x 235 x 80 mm / 12.40″ x 9.37″ x 3.15″ |
What's Included
- GZCS SW-800A
Ground Zero
About the Ground Zero GZCS SW-800A
From our tech experts at CEN
A Ground Zero underseat subwoofer, 8 inch, 120w RMS, shallow enough to slide under a seat rather than take up boot space.
Who it suits
Drivers who want more low end without losing luggage room, and vans and campers where a boot box is not an option.
Our tech experts advise
It still needs a power feed and a signal source doing properly, and setting the level against your existing speakers is what makes it blend rather than boom. 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: Does the GZCS SW-800A need a separate amplifier?
A: No. The SW-800A has a built-in amplifier rated at 120W RMS (180W max) driving an 8 inch flat subwoofer.
Q: Will the GZCS SW-800A fit under my seat?
A: It is designed for under-seat mounting and measures 315 x 235 x 80 mm (W x L x H). Check the space under your seat against these dimensions, or ask CEN to check for your vehicle.
Q: Can the GZCS SW-800A connect to a factory stereo?
A: Yes. It has a high-level input and an automatic turn-on function, so it can be integrated into factory-installed systems as well as aftermarket ones. A remote control and wiring kit are included.
Q: Can CEN fit this subwoofer for me?
A: Yes. CEN offers professional subwoofer installation from our Nottingham premises. Contact us to book an installation slot or ask for a fitting quote.
