CONNECTORS
Audio connectors
Every connector in the parameter database — diameter, pole count, signal topology and reference standard.
6.35 mm TRS (1/4″ Phone Jack)
Invented in 1878 for telephone-switchboard patching, the 1/4-inch (6.35 mm) phone jack predates every other audio connector in the databa…
3.5 mm TRS (1/8″ Stereo) Headphone Jack
The 3.5 mm tip-ring-sleeve (TRS) phone connector has been the consumer headphone standard since the late 1960s, when miniaturization of t…