![Amazon.com: Rockford Fosgate R400-4D Prime 400 Watt Full Range Class-D 4-Channel Amplifier : Electronics Amazon.com: Rockford Fosgate R400-4D Prime 400 Watt Full Range Class-D 4-Channel Amplifier : Electronics](https://images-na.ssl-images-amazon.com/images/I/81SYvgnu9sL._AC_UL200_SR200,200_.jpg)
Amazon.com: Rockford Fosgate R400-4D Prime 400 Watt Full Range Class-D 4-Channel Amplifier : Electronics
![Rockford amp help troubleshooting - Amplifiers - #1 Car Audio Enthusiast Forum in the world! | SMD | Meade916 Rockford amp help troubleshooting - Amplifiers - #1 Car Audio Enthusiast Forum in the world! | SMD | Meade916](https://www.stevemeadedesigns.com/board/uploads/monthly_2020_10/IMG_20201013_204018.jpg.7ecbbf440cf9c632c1252a4c7f5f1488.jpg)
Rockford amp help troubleshooting - Amplifiers - #1 Car Audio Enthusiast Forum in the world! | SMD | Meade916
![Amazon.com: Rockford Fosgate R400-4D 400W 4 Channel Car Audio Amplifier + 4 Gauge Amp Kit : Electronics Amazon.com: Rockford Fosgate R400-4D 400W 4 Channel Car Audio Amplifier + 4 Gauge Amp Kit : Electronics](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/41WB3bCOhAL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Rockford Fosgate R400-4D 400W 4 Channel Car Audio Amplifier + 4 Gauge Amp Kit : Electronics
![Product Review: Rockford Fosgate R400-4D and Blaupunkt XLf 8A Active Subwoofer – Introduction - CarWale Product Review: Rockford Fosgate R400-4D and Blaupunkt XLf 8A Active Subwoofer – Introduction - CarWale](https://imgd.aeplcdn.com/1280x720/cw/ec/35264/Blaupunkt-subwoofer-Rockford-Fosgate-amplifier-131204.jpg?wm=0)