There were 23 Godzillas produced. Some were class A, some class A/B. I had S/N 19, which was the A/B version. 350 wpc into 8 Ohms and 1000 wpc into 2 Ohms! These were dual-mono, 1 chassis amps, and each channel was bridged; slew rate of 600 volts/microsecond. The beast drew 9 amps just idling... no signal present (Very high bias). The Eagle was a class A amp and that might have been the difference.
Good luck with the Grandson. You will be pleasantly surprised.
Good luck with the Grandson. You will be pleasantly surprised.