Apologize for yelling at her! Then take the speakers in for 'repair' (just have them 'checked out', I'm sure they're fine if they sound fine). Then tell her that you need to buy a new _____ preamp to make sure this doesn't happen again. She'll feel so bad for 'damaging' the speakers, she won't complain. Never pass up a golden opportunity to upgrade. BTW, try a tubed preamp, maybe a AR, BAT, Cary or other. Turn a muff into a gain.