FULLY TESTED FULLY FUNCTIONAL VIDEO OF TESTING AVAILABLE Manual not available The Rockford Fosgate TYPE RF X2 is a two-channel power amplifier designed for car audio systems. It has been tested and is in excellent condition. The brand is Rockford Fosgate, a well-known name in the car audio industry. With two channels, this amplifier can power two speakers or a single subwoofer. It is a great choice for those looking to upgrade their car's sound system.