Tough spot you're in. Try & get your wife involved with listening to the music, even if it's something you don't care for. This could serve as a segue so you can explain how the positioning of the amps will contribute to a more musically sounding system & you would really like her blessings regarding this because you love her & when you play certain songs it reminds you how you guys got together, how you feel about her now, etc. etc.
If that doesn't work you could try for a compromise regarding something she wants to do, whatever that is.
Good luck.
If that doesn't work you could try for a compromise regarding something she wants to do, whatever that is.
Good luck.