What is the maximum output power of the A4ti amplifier?

In stereo mode at 8 Ω, the A4ti delivers 500 W x 4 channels. At 4 Ω stereo it delivers 750 W x 4, and in bridge mode at 8 Ω it delivers 1500 W x 2. Power figures at 4 Ω and bridge are tested under 20ms burst conditions at 1 kHz sine wave and 1% THD. (Page 4)