I'm blowing...
Although the receiver delivers 140wpc in stereo, I thought I could use a little more and so took advantage of the bridge mode.
I guess its now capable of north of 200wpc....but....even with the wick up its now running cooler.

I'm thinking this is a result of the individual amplifier boards sharing output and not working so hard.

I've long been of the opinion that due to the fast pace of development, older A/V receivers are a steal secondhand...but for 80 quid this one has really surprised me.