I have a RF 300w 4 channel punch amplifier .
​​​​​​I bought it used. Did not come with any of the wiring. I have looked and am having a hard time finding the plug-ins for the speaker inputs and outputs. Does anyone know where I can get them??

 

Hello. You can try a local Rockford dealer first, there is a good chance they have spare parts from previous installs:

Dealer locator:
https://rockfordfosgate.com/dealerlocator/

You can also purchase those direct from Rockford using the online store:Power plug: 1040-56378

https://rockfordfosgate.com/products...ls/1040-56378/

Front input: 1560-56458-02

https://rockfordfosgate.com/products...1560-56458-02/

Rear input: 1560-56727-02

https://rockfordfosgate.com/products...1560-56727-02/

Front output: 1560-56568-01

https://rockfordfosgate.com/products...1560-56568-01/

Rear output: 1560-56544-01
https://rockfordfosgate.com/products...1560-56544-01/