The Rotel RKB-650 is a stereo power amplifier designed for multizone audio distribution systems. It is capable of delivering 50 watts of power per channel into 8 ohms or 100 watts per channel into 4 ohms. The amplifier features a rugged construction and is designed to provide reliable and high-quality audio performance. It includes multiple inputs and outputs, allowing for flexible connectivity options. The RKB-650 also incorporates protection circuitry to prevent damage from overheating, short circuits, or other potential issues.