Cart Continue shopping “Rockford Fosgate P400X4 400 Watt RMS 4-Channel Car Audio Class AB Amplifier (2 Pack)” has been added to your cart. Remove item Thumbnail image Product Price Quantity Subtotal Rockford Fosgate P400X4 400 Watt RMS 4-Channel Car Audio Class AB Amplifier (2 Pack) $639.98 Rockford Fosgate P400X4 400 Watt RMS 4-Channel Car Audio Class AB Amplifier (2 Pack) quantity $639.98 Update cart Cart totals Subtotal $639.98 Tax $0.00 Total $639.98 Proceed to checkout