The Ground Zero GZIB 30BR is a premium 12 inch loaded subwoofer enclosure from the Iridium series, designed to deliver rich, controlled low end with strong output and easy installation. This passive vented box comes pre loaded with a 12 inch IRIDIUM subwoofer and features an EFP front bass channel for improved airflow and punchy bass response. The angled rear wall helps optimise fitment in a wide range of vehicle boots while maintaining efficient sound performance.

Built with a wooden enclosure and a front vented design, the GZIB 30BR is engineered for reliable bass reproduction and everyday durability. With 350 Watts RMS power handling and a 700 Watt maximum rating, it is well suited to drivers wanting a solid upgrade over factory audio without needing to build a custom enclosure. The 4 ohm impedance makes it a practical match for a range of compatible amplifiers, while the push terminal allows straightforward wiring during installation.

Measuring 460 x 320 x 327/255 mm, this single loaded subwoofer box offers a compact yet capable solution for adding deep bass to your sound system. The 12 inch woofer diameter and 37 litre net volume help create the kind of low frequency presence that brings music to life, making the GZIB 30BR a smart choice for users seeking quality, convenience, and the proven performance of the Iridium series.

Features & Benefits

• Iridium series loaded enclosure for strong bass performance and easy setup
• 12 inch pre installed subwoofer saves time and simplifies installation
• Front vented design with EFP bass channel for improved low frequency output
• 350 Watts RMS and 700 Watts max power handling for dynamic sound
• Angled rear wall helps maximise boot fitment and installation flexibility
• Wooden enclosure with push terminal for durability and convenient wiring