Sound quality is very good and it can drive 4/6/8 ohm speakers. It has sufficient power output 2*50W. 

Features:
Sound quality is very good by using this module.
TPA3116 stereo audio power amplifier chip.
Two-channel stereo digital amplifier board.
With volume adjusting knob: clockwise to turn up volume; anticlockwise turn down.
Applicable speaker impedance: 4/6/8 ohm.

Specifications:
Supply Voltage: DC 5-26V
Supply Current: Recommended above 24V 3A Power Supply
Applicable Speaker Impedance: 4/6/8 ohm
Number of Channels: Two-channel Stereo
PCB Board Size: 81 * 64mm / 3.2 * 2.52in
Weight: 85g / 2.99oz

Package List:
1 * Power Amplifier Board Module