Speaker selector that won't degrade sound

I am also interested in hearing from the pro's on this subject.  I'd like to run outdoor patio speakers off of my main system in the living room.  To do so, I would have to run about 25-30 feet of speaker cable through the wall to my amp.  I have heard of and seen pictures of an Adcom speaker selector, but don't want to mess-up the signal on my main system.  Don't know if the Adcom would do so.

The alternative for me would be to move the office streamer and Dac/pre to the patio and use powered speakers with 10 feet of rca cables and 10 feet of a single speaker cable.  I have an Ethernet connection on the patio but, would have to move the system inside whenever it rains.  Not my first choice.

Guys, thanks for the answers to the outdoor speaker question.  Seems that from the above answers to the speaker/amp switch box question, it looks like I will have to just set up a streamer and a dac outdoors with powered full time outdoor speakers. 

So far the Pro-ject Stream Box S2 Ultra and Pre-Box S2 Digital are great.  Just need to find decent powered outdoor speakers.  Any recommendations?

Although I did see advertised somewhere a month or so ago a very expensive outdoor speaker that was a streamer-dac-amp-volume control-speaker combined.  But at $4k a speaker, no thanks.  Perhaps a grand in total, but I have not yet found one at that price point.