Abstract: An electrical connector for connecting a circuit board to a plug of an electric cable that has at least one electrical conductor includes a rigid housing that has at least a front end, a lower end adapted for mounting to the circuit board, and a rear end. A rigid insert is adapted to fit within the housing and includes an open front end adapted to receive the plug of the electric cable. A plurality of lower rear conductors and optionally upper rear conductors project away from the rear end of the insert. A plurality of insert conductors are adapted to convey electrical signals between the conductors of the plug and the plurality of rear conductors. A modifier circuit board is adapted for attachment to the insert and for modifying electrical signals between the rear conductors of the insert through a modifier circuit.