The Airloc 4mm banana plug and spades are the ideal finishing connection to ensure you get the best from your speaker cable.
Airloc ABS 4mm banana plug pair
The new Forte banana plug section is designed to maximise contact area throughout the wide tolerance range encountered in 4mm amplifier and speaker sockets. Some can be quite tight whereas others may be loose, so the spring loaded Forte blade is designed to fit into smaller and larger sockets with equal insertion force. This means that the contact area is maximised and the connection remains uniformly tight.
The banana plugs and spades are made of brass which has roughly twice the resistivity of copper. For this reason the plug was devised so that its cross-sectional area would be at least double that of the cable to which it was connected effectively cancelling out the extra resistance of the plug material. QED then plates the connector with high purity gold which has a resistivity almost as low as copper but more importantly does not oxidise in air.
WHAT IS AIRLOC™
Airloc™ is a form of cold weld system that can be used to permanently attach QED Forté™ banana plugs or spade terminals to our entire range of speaker cables. By using a cold weld crimp type termination Airloc™ plugs squash the conductors and plug together to improve contact area and reduce resistance.
As can be seen in the graph below, by the time the full pressure has been applied the resistance of the joint has reached a minimum value. Now, because all the air has been removed from the joint there will be no oxidisation of the contact surfaces so the low resistance will remain for the lifetime of the cable. During the cold weld process the cable and plug become one solid piece of metal.
24k Gold plated
Black / Red