Ab763 volume output lvl question

[KimboDb]

Just wondering, I was looking but couldn't find a source for db output lvls for the different models of the ab763. The reason I ask is I've never play an original and I want to make sure what to expect.
My one channel ab763(super reverb) is working great, I just am wondering if the amp has the volume output it should. I currently have it running into a 4oh m 2x10 cab rated for 400w. 

[PRR]

Get a dummy load and measure the power output.

The SPL depends too much on speaker, room, and what you play, to be a metric for the amplifier.