The Kenwood KAC-6406 amplifier is a solid piece of equipment that comes at a budget price. This is going to appeal to people who do not have a lot to spend on a car sound system, but the trade-off is that it is not going to give the very best quality sound.
The Kenwood company is known for producing durable and reliable equipment at relatively low cost, and the KAC-6406 fits right into that bracket. It is an external amplifier that has 4 channels with 40 watts output on each one. You can switch the amplifier to 2-channel mode and get 260 watts RMS output. Output is measured using the CEA-2006 standard, so that is exactly what you get.
Better Than a Standalone System
The product dimensions are 3-1/4ins wide x 2-3/16ins high x 7-15/16ins deep, so you are going to need a bit of space to install it. You will also need to buy power and ground cabling, as these leads are not supplied with the amplifier.
The unit is just an amplifier, and is not a standalone system. It will appeal to people who want to boost the performance of already installed speakers. Alternatively, some people may want to purchase this and combine it with new speakers to replace their existing in-car sound system.
For a moderately priced amplifier, the Kenwood KAC-6406 delivers good quality sound. In the confines of a car or truck, the output is fine, and will be more than enough for the majority of people. The unit comes with a 1-year warranty.