Amplifiers:A Keeper for Life. Do you know of one ?

My GAS500 Ampzilla, because I got it from it's designer, and even at 30 years it is unsurpassed in every regard.

You will LOVE the Grandson. Sounds best pushed hard (can handle 1 ohm!). I owned a Godzilla at one time... took it to the 1984 CES to a/b it against John Iverson's Eagle 7a. The Eagle won, hands down. Fantastic amp. Godzilla's designer has never been the same since!

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.

Sizemore - The Ampzillas varied a bit. The original was basically an updated Dynaco 400, both having been designed by James Bongiorno. I have the last version, the GAS 500 which was designed by Andrew Hefly. I would put this 30 year old beast up against any modern SS amp with complete confidence. Your Grandson is a keeper... NEVER part with it. And by all means drive it into a 1 Ohm load if possible. It will sing even sweeter. Bongiorno's word for it was "tubistor".