Ground Zero GZRA 65.4-MICRO
The Ground Zero GZRA 65.4-MICRO is a plug and play micro 4-channel ISO amplifier that upgrades factory sound systems without cutting a single wire. Built with Class D technology and SMD components, it packs 4 x 65 W RMS into an ultra-compact housing and connects between the OEM head unit and the speakers via the included ISO harness, with easy integration of an additional mono amplifier for a subwoofer.
Key Features
- Plug and Play ISO Amplifier: Connects directly to the factory wiring with the included ISO harness
- Class D Technology: Efficient amplification with minimal heat and current draw
- Micro Format with SMD Components: Fits in the smallest spaces behind the dashboard
- Fixed High-Pass Filter: Protects door speakers from deep bass and increases clean output
- Easy Mono Amplifier Integration: Simple expansion with an additional subwoofer amplifier
- Stable Power Supply: Consistent performance in OEM vehicle installations
- High-Level Input with Auto-On: Automatic turn-on from the factory head unit signal
- Compact Heatsink: With Ground Zero lettering
Technical Specifications
- Channels: 4
- Output Power (4 Ohm): 4x 65 Watts RMS
- Output Power (2 Ohm): 4x 75 Watts RMS
- Output Power (4 Ohm bridged): 2x 150 Watts RMS
- Max. Output Power: 340 Watts
- Frequency Response: 10 Hz – 22 kHz
- HPF / LPF / BPF: Yes / Yes / Yes
- Bass Boost / Phase Switch: No / No
- High-Level Input / Auto-On: Yes / Yes
- Dimensions (W x L x H): 82 x 185 x 40 mm (3.23 x 7.28 x 1.57″)
The easiest way to give an OEM sound system a serious power upgrade in minutes.














