Description

Ground Zero GZIB 30BR – 12″ Ported Car Subwoofer Enclosure (350W RMS, 4Ω)

The Ground Zero GZIB 30BR – 12″ Ported Car Subwoofer Enclosure (350W RMS, 4Ω) is a powerful loaded subwoofer enclosure from the Ground Zero IRIDIUM series, designed to deliver deep, dynamic, and high-impact bass for everyday listening and high-performance car audio systems. Featuring the proven Ground Zero GZIW 30 12-inch subwoofer, this professionally tuned bass reflex enclosure provides impressive low-frequency output while remaining easy to install.

Built with a durable wooden enclosure, front bass reflex port, and an angled rear panel for easier installation, the GZIB 30BR is an excellent solution for anyone looking to upgrade their car audio system with strong, controlled bass.

IRIDIUM Series – Powerful Everyday Bass Performance

Ground Zero’s IRIDIUM Series is designed to offer an outstanding balance between sound quality, reliability, and performance. The GZIB 30BR delivers deep and accurate bass reproduction while remaining suitable for a wide range of music genres.

Whether you’re listening to electronic music, hip-hop, rock, or pop, this enclosure produces clean and powerful low frequencies with excellent control.

High-Performance 12″ GZIW 30 Subwoofer

At the heart of the enclosure is the Ground Zero GZIW 30, a high-quality 12-inch (30 cm) subwoofer engineered for powerful bass reproduction.

Its large cone area moves more air than smaller subwoofers, allowing it to reproduce deeper frequencies with greater impact and higher sound pressure levels.

Benefits include:

• Deep and powerful bass
• Excellent low-frequency extension
• High acoustic output
• Smooth and controlled response
• Reliable everyday performance

Optimized Ported Enclosure

The GZIB 30BR uses a professionally tuned bass reflex (ported) enclosure with an EFP front bass channel, maximizing efficiency and improving low-frequency performance.

Advantages of the vented enclosure include:

• Higher efficiency than sealed designs
• Increased bass output
• Stronger low-frequency response
• More dynamic sound reproduction
• Improved overall listening experience

The front-ported design helps produce clean, punchy bass while maintaining excellent control.

Durable Wooden Construction

The enclosure is built from high-quality wood to minimize unwanted resonance and maximize bass accuracy.

The robust cabinet provides:

• High structural rigidity
• Reduced enclosure vibration
• Improved bass clarity
• Long-lasting durability

An angled rear wall also allows easier positioning inside the vehicle while maximizing available trunk space.

Easy Installation

Designed as a complete loaded enclosure, the GZIB 30BR is simple to install.

Features include:

• Push terminal connection
• Compact all-in-one enclosure
• Ready for amplifier connection
• No custom enclosure required

Simply connect it to a compatible amplifier and enjoy a significant upgrade in bass performance.

Key Features

• 12″ (30 cm) Loaded Car Subwoofer Enclosure
• 350 Watts RMS Power Handling
• 4 Ohm Impedance
• Ground Zero GZIW 30 Subwoofer
• IRIDIUM Series
• Bass Reflex (Ported) Design
• EFP Front Bass Channel
• Durable Wooden Enclosure
• Angled Rear Wall for Easier Installation
• Push Terminal Connection
• Deep, Powerful and Dynamic Bass

Technical Specifications

Package Includes

• 1 × Ground Zero GZIB 30BR Loaded Subwoofer Enclosure

Why Choose Ground Zero GZIB 30BR?

The Ground Zero GZIB 30BR is an excellent choice for drivers looking for powerful bass without the hassle of building a custom enclosure. Its 12-inch GZIW 30 subwoofer, professionally tuned ported cabinet, and durable wooden construction deliver deep, punchy bass with excellent efficiency and reliability.

Perfect for upgrading factory or aftermarket car audio systems, the GZIB 30BR offers an outstanding combination of performance, ease of installation, and the premium sound quality that Ground Zero’s IRIDIUM Series is known for.