I remember when preamps (all tube) had cathode-follower output stages with 600 ohm impedance. In such a circuit the coax connection to the power amp was critical. At the very least, hum pickup was a problem. Now, if you have a solid state preamp your output impedance is 10 to 50 ohms, and you can transmit that low-level signal a long long way: in particular, much further than you should try to drive the high-current speaker signal. Cheaper too if you buy the coax wire directly from the manufacturer, before it gets the absurd markup that goes with the designation "audiophile".
I run coax from the convenient eye-level shelves in an alcove where the source equipment resides, down to the cellar (that's 6 feet already) and along the cellar ceiling to shelves just under the living room floor where the power amps are located. Probably 30 feet in all. The speaker wires are just long enough to go up through the floor. I have never sensed any problem with this setup, and it sure cost less than the six! (L,Ctr,R, all biamped) 30 foot heavy gauge speaker wires that would otherwise be needed.
I run coax from the convenient eye-level shelves in an alcove where the source equipment resides, down to the cellar (that's 6 feet already) and along the cellar ceiling to shelves just under the living room floor where the power amps are located. Probably 30 feet in all. The speaker wires are just long enough to go up through the floor. I have never sensed any problem with this setup, and it sure cost less than the six! (L,Ctr,R, all biamped) 30 foot heavy gauge speaker wires that would otherwise be needed.