The Ground Zero GZIA 135.4 from the Iridium series is a powerful 4 channel Class AB amplifier designed for clean, reliable sound reinforcement in a wide range of vehicle audio setups. Built with a stable power supply and an integrated active crossover, it delivers the control and flexibility needed to drive front and rear speakers with confidence, or to run a bridged pair for stronger output. A black anodized heatsink with Ground Zero lettering gives the amplifier a premium finish while helping manage heat during demanding use.

With 4 x 100 Watts RMS at 4 Ohms, 4 x 140 Watts RMS at 2 Ohms, and up to 2 x 280 Watts RMS bridged, this amplifier offers serious performance for upgrading factory systems or building a more refined aftermarket setup. The variable active crossover and bass boost provide easy tuning options, while the high level input with auto-on function makes installation simpler in many modern vehicles. Large terminals also help support secure connections for dependable everyday operation.

Designed for enthusiasts who want strong output and audio control in a compact footprint, the GZIA 135.4 combines practical features with the trusted engineering of the Iridium series. Its broad frequency response and flexible filtering make it well suited to a variety of speaker configurations, delivering impressive clarity, punch and versatility for your sound system.

Features & Benefits

• Iridium series 4 channel amplifier for versatile system upgrades
• Class AB design for efficient, detailed sound reproduction
• Integrated active crossover for flexible speaker tuning
• High level input with auto-on function for easier integration
• Bridged output capability for added power where needed
• Black anodized heatsink with large terminals for durability and performance