I think.... yes. 8-)
Test it before you start the next session tho'.

Bas.

You should check with the manufacturers. There are products out there that do not like being on there side, especially if they have large transformers on their chassis. This would include the Avalon and UA stuff. I think that the others are "safe" because they don't have the heavier components in them...but you definitely need to ask Avalon and UA...Also consider that anything with a mechanical VU meter should probably be left "horizontal" due to gravity's effect on the ballistics...

cool thanks. no VU meters so not an issue with that...and the UA has an external power supply, but the avalons I will look into.

thx

I would also worry about cooling, especially if anything has a tube in it (doesn't look like you've got anything tube-based in that list). Just a thought.