Can u run LFE and l/r into one RCA into sub's input?

[z28chrismac]

This may be a no-brainer, but I have one long RCA running to my sub- can I split that 3 ways to connect the receiver sub and main output to the sub input? Or would I need 3 discrete cables?

[rpf65]

You either run 1 cable srom sub uot on your AVR to the sub in of the speaker, or you run the 2 wires from sub out (l/r) tp the l/r input to your sub. Not both.

[Speedskater]

This may not apply here, but:

While you can (Y) "Why" (or split) the output of a component to two or three inputs.

You cannot (Y) "Why" (or join) two or three outputs into one input.