pkg Alpine MRV-M500 Monoblock 500W RMS + MRV-F300 4-Channel 300W RMS Amplifiers MRV-M500 - Alpine 1-Channel 500W RMS 1000W Max V Power Series Car Amplifier Dimensions: 6-1/2'' x 2-3/16'' x 7-7/8'' MRV-F300 - Alpine 4-Channel 300W RMS 600W Max V Power Series Car Amplifier Dimensions: Dimensions: 7-7/8"W x 2-3/16"H x 7-7/8"D