ATOTO CA-AEC03 Class D Compact Digital Car Amplifier, 4 Channel, RMS 4x55W, Dual SPDIF, Full Range, 4–8 Ohms Stable, Compatible with ATOTO A5/A6/F7/S8/X10 Stereos (Not for S8 PN, P5, P8, P9)

ATOTO CA-AEC01 Car Amplifier, 4 Channel, 400W Max Power, Class A/B, 2/4 Ohm Stable, Only Compatible with Selected ATOTO Car Stereos

ATOTO CA-AEC122D Car Amplifier, Class D TI TPA3221, 2 Channel, 108dB SNR, Low Distortion, 2/4 Ohm Stable, Supports 7V-30V Input, Only for Selected ATOTO Car Stereos

ATOTO CA-AEC02 Power Pack Amplifier, Quick and Easy Plug-N-Play Installation, Great Sound Quality, Only Compatible with Selected ATOTO Car Stereos