FOUR Connect STAGE3 RCA-cables are carefully designed to get best possible results with best possible materials. These cables have thicker than usual conductors that are made of tinned OFC ( T-OFC ). Cross section of conductor is 0,5mm2, which is a real overkill to RCA-cable. Quad shielded Twisted Pair structure eliminates unwanted noise. Another noise eliminating factor is an extra wire that is inside all cables. Conductors are covered with dual foil to prevent inductive noises. Conductors are isolated with two layers of materials that are used in high voltage cables. This structure gives unbeliavable good noise supression that is especially important in car environment. Connectors are Rhodium-plated Bite Hold Molded Connectors ( BHMC ) and every connector is tested in factory that they have excellent grip. Connector housings are made of HDPE-plastic that has high insulation factor. Housings have opposite cone structure that works as a strain relief to cable.