I am a retired CFP, Certified Financial Planner. I worked in a trust and estate law office for 8 years. We told people that if they were going to leave gifts ($) when they died yet could afford to give those gifts at that time, do so. This allows the beneficiaries to say thank you and you to see the enjoyment on their faces.
As for audio equipment, if you can, give it away now when you can help set it up and see the joy you have given. Try a group that helps refugees. There may be someone who was an engineer in a past life who can enjoy setting up a system that s/he could never afford.
Second, take a look at Happy Money by two psychologists, Dunn and Norton. It will change, for the better, how you think about money.
Finally, talk with an experienced trust attorney. Well worth the money.

