【GROUND ZERO GZIB 30BR｜Bass-Reflex Woofer Box with 30cm Subwoofer】

GZIB 30BR is a bass-reflex complete woofer box equipped with a 30cm (12-inch) 4Ω SVC subwoofer unit.
It’s a model designed for those who want to add bass firmly, but also want low frequencies that come together nicely as music—not just something that plays loudly.

Using a 3D honeycomb-structure HQPP cone, a POLYCOT spider, and a 50mm voice coil, the enclosure features Grand Zero’s original base tunnel design.
With a configuration that not only provides satisfying bass quantity but also makes it easier to achieve thickness and a strong push, this subwoofer lets you feel the benefits not only with rock, EDM, and hip-hop, but also when you want to give more solid grounding to the music you normally listen to.

A subwoofer isn’t something you simply install and you’re done—its impression changes greatly depending on how it integrates with the front speakers, the amplifier combination, and how it sounds inside the vehicle.
At LOGON, we don’t just aim to boost bass; we consider how to connect it naturally to the music playing from the front, while taking into account your vehicle model and how you use the luggage space, your current audio setup, and the direction of sound you want to enjoy.

The sides of the box are equipped with a 12-gauge nickel-plated speaker terminal compatible with banana plugs, with consideration given to ease of connection and removal.
This is a specification that’s also easy to handle for those who want to detach and reattach the subwoofer box depending on how it’s used—for example, at events or when loading and unloading luggage.

Adding bass makes it easier to improve not only the impact and presence of the music, but also the sense of something missing when listening at low volume, and the feeling that the low frequencies get buried while driving.
By consulting with us—including amplifier selection and adjustment—based on how you use your car and your preferences, you’ll be able to bring out even more of what makes the GZIB 30BR special.

Main Specifications & Specs

■ Main Specifications & Specs

【Basic Information】
Product name: GZIB 30BR
Brand: Grand Zero (GROUND ZERO)
Type: Bass-Reflex Complete Woofer Box
Installed unit: 30cm (12-inch) Subwoofer
Impedance: 4Ω
Voice coil: SVC

【Unit Configuration】
Cone: 3D honeycomb-structure HQPP cone
Spider: POLYCOT spider
Voice coil diameter: 50mm

【Box & Connections】
Box type: Bass-Reflex
Base tunnel design: Yes
Speaker terminals: 12-gauge nickel-plated terminals compatible with banana plugs

This information has been organized based on publicly available details that can be confirmed.