Questions about Img Stage Line SAM-300D

The product manager was able to provide us with the following data: - Peak output power: 420W - Nominal power: 300W - Rated power at 4 Ohms: 300W - Nominal power at 8 Ohms: 150W Also, the article should be suitable for a subwoofer, here is the answer from our colleague about this: "...yes it is valid for usage in subwoofer, as by default it is digital D class amplifier, that provides a powerful bass reproduction in self-built subwoofer systems".