If you're afraid that your system (stereo) is a trigger, then I'd be OK with avoiding it for a while.
As we cross that border between alcoholism and sobriety, we are making a huge behavioral change! A lot of things become uncomfortable or strange.
We have no experience in how to live this new life; most of our past was informed by our drinking, which actually worked when we started it, but has become our un-doing now as we step onto the firm ground of sobriety, there is confusion about how we should "be" and do, and finally, who am I really?
My two cents? Easy does it, but do it.
Every time you are confronted with a decision, think it through, use sponsor or the community for reflection, and do the next right thing. Think think think-but don't forget, sometimes you can't make sense out of nonsense!! (nonsense being the ongoing lack of sanity left over from our former existence) Sometimes when I ask myself a question about my behavior or someone else, I have to remember, often the answer to "why" is "because I'm an alcoholic! (and it's still informing some of my thinking), not some deep psychology!
There were many things that went together with booze and pot: cigarettes, coffee, and music. Also, shame, humiliation, headaches, and all kinds of damage or debris to try to clean up.
My hunch? Don't sell the stuff. It can probably be an almost spiritual source for you down the road. Mine is. I used to get liquored-up and bring my trumpet to peoples gigs and play along uninvited-then deal with the self disgust and loathing the next day. How many speakers did I burn out while drinking, how many records ****ed up?
Today music is central to my sober life. And I'm responsible for it. I study and practice, and when i go to a jam session, it has integrity now. People like me. I feel accepted and a part of where I used to feel apart from. And I really LISTEN to it. Go figure!
Thanks for indulging me, and thank you Costerdock, for sharing. Just keep coming and growing. Everything will work out OK.