I don't pretend to know what's going on with you, your wife, and your system.....but I'll second MarqMike: Lots of musicians are apparently deaf to reproduced sound. I deal with musicians all the time and the variety of their reactions to the same recording thru the same system is bewildering.
BTW, I have a small home studio and the recordings in question are sometimes my own efforts: Recordings of people who were playing in the same space that playback is offered thru my system. If there's a guy on guitar and a woman singing on the recording there will frequently be four or more opinions. (Love my guitar, love her vocal, but hate the mix....or....love the mix, hate her vocal, love my guitar....etc. Then you have her takes).
There's no rhyme or reason.
BTW, I have a small home studio and the recordings in question are sometimes my own efforts: Recordings of people who were playing in the same space that playback is offered thru my system. If there's a guy on guitar and a woman singing on the recording there will frequently be four or more opinions. (Love my guitar, love her vocal, but hate the mix....or....love the mix, hate her vocal, love my guitar....etc. Then you have her takes).
There's no rhyme or reason.