No one actually knows how to lculate what speaker cable they need

Mr b4icu
Abtenet (batenet) is not from Germany,but not so far away, Scandinavium Sweden.My reason for not having my amplifiers 
more close to speakers is just cosmetic.The speaker placement is about 7 foot from backwall of my room,and with all electronic equipment more than 10 monoblocks and everything else i had to organize it a bit.
 

"No aircraft carrier. Also no one should place his amplifier 1000m from its speaker. That’s common sense. It seems to me that you could use some more of it!"

And you sir, may I suggest that you, in turn, try to develop a bit of a sense of humor? Also, you are totally wrong about the effective doubling of length of speaker wire (nice try!) because you aberrantly believe that the signal goes out and then returns.  Where the heck did you get your electrical engineering education and experience? That is total horse hockey. Impedance is impedance is impedance and you are not going to change physics just because you want to.

Mr. stevcham

Sorry, if it wasn't humor!

Current always goes one way, never flows in close loop. How could I miss that lesson in engineering? That’s the very basic. Way before Kirchhoff's circuit laws https://en.wikipedia.org/wiki/Kirchhoff%27s_circuit_laws

Single speaker cable sounds way better than two wires (red and black). Its SNR is phenomenal. It is hard to find those days' speakers and amplifiers with two binding posts per channel.

Impedance is very important when two separate cables are used. I wonder if you took the time to read my say about it on this thread.