Mono Amplifier/single channel amplifier Sound test with connections for inbuilt bass tube subwoofer 

Amp purchase link amzn.to/3UVLpHp
Sub woofer purchase link
FABTEC 12V Dual Channel 120W Car Multi Channel Amplifier Stereo Power Bass Sub Woofer Kit, Monoblock, Class AB, Mosfet Power Supply
BASPRO US-10 10 inch Compact Underseat Subwoofer Enclosure with inbuilt Amplifier
DODJ Basstube, Subwoofer Slayer, Pure Bass, Mono Bass Amp (120W, 12V DC)
FABTEC 12V Dual Channel 120W Car Amplifier Stereo Power Mono Amp Audio, Bass Sub- Woofer kit, Black Body Encloser ,Car Multi Channel Amplifier Class AB, Mosfet Dc Power Supply
FABTEC 8 Inch Black Car Bass Tube Subwoofer with Inbuilt Amplifier - Powerful Audio and Deep Bass (8 Inch)
FABTEC 8 Inch Under Seat Active Subwoofer Bass Tube for Cars (InBuilt Amp, 200 RMS)