Product details

The Ground Zero GZRA 65.4-MICRO is an ultra-compact, high-efficiency Class D 4-channel ISO amplifier. Part of the Radioactive series, it is engineered specifically for discrete, plug-and-play upgrades to factory (OEM) car audio systems without altering the vehicle’s original wiring harness. Core Technical Specifications Amplifier Type: High-efficiency Class D Channels: 4 Power Output (@ 4Ω): 4 x 65 Watts RMS Power Output (@ 2Ω): 4 x 75 Watts RMS Bridged Power Output (@ 4Ω): 2 x 150 Watts RMS Maximum Output Power: 340 Watts Max Frequency Response: 10 Hz – 22 kHz Dimensions (W x L x H): 82 x 185 x 40 mm (3.23″ x 7.28″ x 1.57″) Key Features Plug & Play ISO Harness: The package includes a full ISO connection cable kit. This connects right between the factory head unit and the vehicle wiring, pulling audio signals and supplying power directly without running complex power cables to the battery. High-Level Input with Auto-On: Includes automatic signal detection. When it senses an audio signal from your stock car radio, it wakes up automatically, eliminating the need for a separate +12V remote turn-on wire. Ultra-Compact Footprint: Built with advanced Surface Mount Device (SMD) components to maximize reliability while saving space. Its micro form factor makes it easy to hide behind the dashboard, inside the glovebox, or under a seat. Simplified Audio Tuning: Features fixed active crossovers (High-Pass / Low-Pass / Band-Pass) to keep configuration straightforward while protecting factory speakers from low-end distortion. System Expansion: It allows for easy Daisy-Chain integration if you choose to add a secondary mono amplifier for a dedicated subwoofer down the road.