What made you put together your first 2nd system?

I have two “second systems”. One is the basement in my exercise space and is composed of leftover components that I hung on to too long and when I finally decided to sell them I learned just how much they had depreciated so kept them. The second “second system” is at our country cabin and is built around gear that I always lusted after way back when I was getting started in this hobby, but couldn’t afford then like the beautiful Meitner mahogany encased mono blocs and pre.  Depreciation works both ways 😀

Then there’s the Oppo/B&K/Totem video surround setup, the Pioneer receiver/Advent garage setup, backyard Onkyo/Polk setup, bedroom Scott/Design Acoustics setup. I’m sure I’m forgetting something, but I don’t really consider these “systems”. Way too much stuff!

Clear from the OP that second systems are not done out of dissatisfaction for the first, pace ebm. 

If I start a second system, it would likely get its fuel from two different motives; first, I have extra gear that is not worth selling nor worth giving away. Example, I have some Adcom gear that sounds quite decent but is not worth much. It could form a nice second system.

Another motive might be to have a solid state system with different power and speakers which crave it OR a low power system with high efficiency speakers and a sweet low-watt tube amp.

sensibility

First 2nd system came about when we bought a log home in the mountains.  Wanted some music so had an extra CDP and tuner. Bought a new Grommes PHI-26 and used Klipsch Quartets.  No Phone or internet.

Three systems, one in each of the places in my house where I spend a good deal of time, living room, office and garage workshop. All of them are tied together by WiFi so that I can move from place to place without any interruption in what's playing.