The idea has crossed my mind, and the key thing would be to make the hobby clear to the average viewer, because only when they understand the basics can they start to laugh at the excesses.
I think that a workable angle could be: someone who gets into the hobby and whose life gradually gets taken over by an increasingly huge audio system.
As Stan Freberg said: "As you sit shivering at night in your garage...listening to your house."
The angle will be easily understood by anyone who lives with someone who collects anything, and the frustration (and fun) that can come from it.
One scene I have always had in my head is someone who's not an audio nut per se visiting one of the 'high-end' stores of the 80es.
The subdued lighting, the museum-like ambience, the hushed voice and snooty attitude of the clerk, and the bewilderment of the guy who just needs an RCA cable could make for something very funny.
Made-for-cable movie, I should think. I don't think a series could sustain interest for a general audience.
Just my 2c worth...have fun with it.
Claus.