Thank you Legairre. I keep running into this same problem: I cannot find the word Small on the menu setting display on the MRX. When I am at the word Front, it reads:Front: 80Hz. I keep on hitting on the Front, but no where can I see the word Small but I can see it says Large. I hit on the word Large but the word Small never shows up!!!! the menu just reads:Front: 80Hz!!!!!!! Am I missing something? Thank you.