Connections

The final step is choosing a connection type. There are main types of connectors. It's best to choose one and stick with it. All three have been around for a while and are not really going anywhere. 

• Xconnect - 13.5mm - Male(Input) end has threads on it and the Female (Output) has the Screw Cap  

• Ray Wu - 13.5mm -   Male (Input) has the Screw Cap and Female (Output) has the Threads 

• Paul Zhang -  18.5mm -  Male (Input) has the Screw Cap and Female (Output) has the Threads 

Which one to Pick?  

If you're starting out today, then propbably just go with XCONNECT.  This is a universal standard and no matter who makes it they SHOULD work together.  Give you freedom to buy from anyone :)