Jeff, I have never used them, people who bi-amp sometimes need them to connect two amps to one preamp. The big full line cable/connector companies like Monster Cable, Vampire etc should have two types available: 1)audio y adaptor which has 1 male RCA with very short "y" cable to 2 female RCA, this type may be necessary if you have crowded conditions with no room. 2)also have splitter/y adaptor all in one piece plug, this would be the best way if you have room to connect cables. Monster charges $15 for either model
Of course your local Radio Shack has them, if you use one piece plug gold plated maybe their is little sonic difference.
Of course your local Radio Shack has them, if you use one piece plug gold plated maybe their is little sonic difference.