Actually this is my studio equipment so it really doesn't count as far as an audio component collection...still, I listen and record in here, so I thought I'd post.
I keep my midi generators samplers and effects processors here. Mostly gear that I tweak often, so it sits in a rack beside my desk.
The amp, EQs and power supplies are mostly "set and forget", so they occupy a wall rack that I constructed last year.
About 90% of the gear was procured over a 20-year career as an amateur mmusician, hence the dated equipment. Most of it can be replicated with PC music software, but hardware just looks cooler!