Why don‘t servers/players incorporate polarity switches

@lalitk 

Your comment shows your profound ignorance on this topic, lest you care to elaborate

Many preamplifiers include this function. I don't see any advantage to having the feature in a server.

I was at a hifi demo of some fancy Wilson speakers a year or so ago. One of the store's sales people could tell the difference of polarity right away. He tried to demonstrate it to the customers, but unfortunately for me I was not able to tell. Perhaps after some time it would be something I could notice. This just goes to show there are things in audio that others can hear even if we can't at the time. I don't think he was making this up. He could walk into the room and would say "switch the polarity" which of course was just a button on the remote. Since each recording could be about 50/50 chances you would be switching this feature a lot as we were sampling all different kinds of music. If you can't hear it, that does not mean it does not matter. Kind of like the tree in the forest.

@antigrunge2  You just make it so easy. lol.

70% of the time it can be heard every time. I agree the difference can be heard and I used to spend the time but I gave up years ago messing with polarity. Both my preamp and DAC have switching. Problem is often the entire recording may not be inverted but possibly in the studio a mic or one or more piece of equipment may be out out of phase from the rest but not all. I find the more my system has become refined the less I mess with some of these tweaks but might revisit as both remotes have invert button so why not. Cool thing is on my preamp from the vents on the lid, the blue LED’s turn off when polarity is inverted so it’s easy to see from my seat.