This document provides instructions for using the KAC-M845 KAC-M645 channel amplifier, including safety precautions and precautions. For safety precautions, use vehicle-grade wires or wires with a cross-sectional area of 5mm2 (AWG8) or above to prevent wire degradation and damage to the insulation. Do not drop metal objects into the device to avoid accidents such as short circuits. If the device smokes or has an odor, immediately turn off the power and contact the dealer. Do not touch the surface of the device during use as it may cause burns. Installation and wire connection require certain skills and experience, and it is recommended to have a professional complete the installation and connection. Other precautions include using a 12V DC power supply, not opening the bottom cover of the device, avoiding exposure to direct sunlight, high temperature, high humidity, water splashes, or dust. When replacing fuses, use fuses with the same specified capacity to prevent device failure. If the fuse needs to be replaced, disconnect the power cord first to prevent short circuits. The document also mentions the protection function of the device and the presence of toxic and hazardous substances in the product.
This manual covers safety precautions, proper installation, and wiring for the Kenwood KAC-M845 and KAC-M645 channel amplifiers. It explains required wire gauges, grounding, fuse replacement, and environmental restrictions such as avoiding direct sunlight and high humidity.
The guide also details control settings, protection functions, troubleshooting tips, and full technical specifications, including output power, frequency response, impedance, and dimensions. Parts lists and wiring diagrams are provided for both stereo and bridge configurations. This manual is written in Chinese.
| Maximum output power | 720 W (180 W × 4) for KAC-M845, 500 W (125 W × 4) for KAC-M645 |
|---|---|
| Frequency response | 5 Hz – 50 kHz (+0 / –3 dB) |
| Signal‑to‑noise ratio | 94 dB |
| Input sensitivity | 0.2 V – 50 V |
| Input impedance | 10 kΩ |
| Current consumption | 36 A (KAC-M845), 19 A (KAC-M645) |
| Dimensions (W × H × D) | 330 mm × 59 mm × 230 mm |
| Weight | 2.9 kg (KAC-M845), 2.7 kg (KAC-M645) |
When a fault occurs, the power indicator turns off and the amplifier stops working; to reset, turn off the power, check for the cause (e.g., shorted speaker wires), and then restore power.
The KAC‑M845 can deliver up to 720 W (180 W × 4) and the KAC‑M645 up to 500 W (125 W × 4).