This achievement is awarded for using any Orange gear when creating a tone in "Tone Designer" from the main menu.
Select "Tone Designer" and then "Edit tone".
Select Amp and then use the change option at the bottom of the screen.
Now select any Orange amp,
Now you can couple this with another achievement and get 2 together.
Now select the Cabinet and change it to either an Eden or Marshall cabinet. Any model is fine and you should also get the following cheevo.
Or