Connection that splits a single cable into two so that it may begin from one source with one connection and terminate in two connections on two components (or it may go the other way where two outputs are joined to the same input but this may not work if both outputs are sending information at the same time).

A Y-connector looks like the capital letter “Y” with the single end at the bottom connecting to the single cable and the split or branched V lines going out to the two connecting cables. Y-connectors are often used with multiple subwoofers when there is only one subwoofer output on a receiver or preamplifier. In such a situation, the output from the receiver or preamplifier attaches to the bottom of the “Y” while two more cables attach the upper branching lines. These two cables connect to the inputs of the two subwoofers so that both subs may be driven from a single output source connection.