An electrical connector assembly (100) comprises an elongate insulative housing (1), a contact set (2), a shield (3), and a plurality of cables (6). The housing has a base portion (11) and a plurality of passageways (111) defined in the base portion. The contacts set is assembled into a rear end of the housing. The contact set comprises an insulative insert (21), a plurality of signal and grounding contacts (22) and a grounding bar (23) assembled in the insert. Each contact comprises a mating section (224) extending beyond the insulative insert and received into the corresponding passageways of the housing and a connecting section (226) remained in the insert, and a step section (228) between the mating section and the connecting section so that the mating section is not coplanar with the connecting section. The plurality of cables extends into the insulative insert and is electrically soldered to the connecting sections.