My only experience with a tube cage was with a Music Reference RM-9 many years ago. It came with a nice steel cage that not only protected the tubes but also looked nice. Unfortunately, it added a slight steely edge to the sound, something I did not pick up on right away but when I compared the sound with cage and without it was apparent. In my experience, once colorations like this are identified, it's hard to ignore them, so for me that meant the nice looking cage went into the closet.
One person's experience with a different model of amp doesn't really mean anything for your situation. The lesson, however, is pretty clear---try your amp both ways and see if you can tell a difference. If you can't, then leave the cage on. But if you can hear a difference, be prepared to put the cage into storage.
One person's experience with a different model of amp doesn't really mean anything for your situation. The lesson, however, is pretty clear---try your amp both ways and see if you can tell a difference. If you can't, then leave the cage on. But if you can hear a difference, be prepared to put the cage into storage.