Learn more › Speaker wire is the unsung hero of any good two-channel audio setup, and even home theater components. Even the most affordable interconnects can have your speakers pumping in no time.

Over time, the jack and plug have spawned different versions with more wires and — particularly ... the mechanism radios use to disconnect the speaker when you plug in headphones.

Virtually all smartphone manufacturers have eliminated the 3.5mm audio jack even though ... the USB connector and cables will too. Going from a simple 3-pin jack to the 24-pin behemoth that ...