As said before, unless you want a very small sub there are better and/or cheaper alternatives then the KC62
Have a look at this thread:
https://www.audiosciencereview.com/forum/index.php?threads/subwoofer-comparison.20494/
There are enough members on the forum with LS50 and subs in their setup so it should be no problem to get good advice about a decent setup.
Have a look at this thread:
https://www.audiosciencereview.com/forum/index.php?threads/subwoofer-comparison.20494/
There are enough members on the forum with LS50 and subs in their setup so it should be no problem to get good advice about a decent setup.