What are the maximum power output specifications for this receiver?

The maximum power output is 50 W × 4 channels at 4 Ω (for no subwoofer), or 50 W × 2 channels at 4 Ω plus 70 W × 1 channel at 2 Ω when using a subwoofer. The continuous power output is 22 W × 4 (50 Hz to 15,000 Hz, 5% THD, 4 Ω load, both channels driven). The load impedance is 4 Ω, with 4 Ω to 8 Ω allowable (2 Ω for 1 channel). (Page 49)