Audiofrog GS42 GS Series 4" 2-way car speaker amp You could also use this

You could also use this amplifier to power two high-performance speakers with 200 watts each plus a sub with 500 watts for optimum power applications

Slim 12” 4Ω subwoofer

frequency range: 90-20

inputs: two rear USB inputs

Maximum Input Voltage (Speaker Level Inputs): 30 Vp

Audiofrog GS42 GS Series 4" 2-way car speaker amp You could also use thisProduct highlights: 2 way car speakers (pair) 4" parabolic polypropylene woofer with rubber surround 3 4" fabric dome tweeter with wave guide faceplate built in 2 way crossover (12dB octave high pass, 6dB octave low pass) power range: 15 50 watts RMS (150 watts peak power) frequency range: 90 20,000 Hz sensitivity: 88 dB top mount depth: 1 15 16" impedance: 4 ohms grilles included warranty: 1 year