I have two things which come into play:
1)Include her in your purchases; ask her opinion about how things sound (try not to ask about how they look), audio should be enjoyment for both of you.
2)Audio purchases are (for me) a trade-off. If she approves of a purchase for you, don't object if she asks you about some purchase she's considering.
One last thing: "Hi honey, look what I just bought (without talking to you about it first)is NOT a good way to start a conversation.
1)Include her in your purchases; ask her opinion about how things sound (try not to ask about how they look), audio should be enjoyment for both of you.
2)Audio purchases are (for me) a trade-off. If she approves of a purchase for you, don't object if she asks you about some purchase she's considering.
One last thing: "Hi honey, look what I just bought (without talking to you about it first)is NOT a good way to start a conversation.