Stacking is hit or miss. Some years back, I stacked Six’s and Seventeens, two sets of Six’s, which was excellent I must say, but I always went back to single pair listening. Never tried with my Fives and Six’s as I ended up preferring just a pair at a time.
But this is a hobby of experimentation, so try what ever combinations you want, that’s where all the fun is! As time goes on, you will probably get to a point where you are happy and loving your system with what ever receiver/amp/speaker/TT/CD player/ DAC, you ultimately set up. It can take years but so much fun!
It really is fun. Stacked, sound is is big Everywhere and what’s not to love about that? Not as specific tho. Sometimes, bigger is better!!!