soundproof a door

i have an idea. buy her a pair of earphones used to block out the sound, especially suited for people who work in a very noisy environment.

if that doesn't work, ask her to move the tv into another room so you can enjoy the stereo while she watches tv.

3 inches thick may be overkill to some, but if it cost me an extra couple hundred bucks so be it. For that matter, if you're planning on living there for several more years you could throw up an extra layer of drywall. Personally I listen fairly loud at times and when you're running a couple thousand watts of sub, a little extra mass is always good. Music is MUCH more enjoyable when the wife is happy !!

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I like Mrtennis' idea.
Get her some earphones.

In my old listening room (a basement in a condo), I bought some rubberized sound deadening material. This is normally used to wrap around ducts to shield them from noise. I used it to insulate the shared joists where I thought sound might leak into adjacent units. I had some left over so I peeled my flimsy hollow door apart and put a sheet in inside. This provided a lot of isolation and damping.