Review on 🔊 Clyxgs TPA3116D2 2.1 Digital Power Amplifier Board - 2x80W+100W Bass Audio Stereo AMP Module for DIY Audio System Speakers (12-26V) by Ankur Songz

The subwoofer output passes frequencies up to about 10,000 Hz, about -6 dB lower, so it is not suitable for direct control of the subwoofer driver , unless it's a passive low frequency filter pass on site, which isn't cost effective if you don't already have the parts on hand. So unless you want tight and dirty bass, the subwoofer channel isn't very useful. The left and right channels work normally and in all ranges. good function. Audio inputs are also good: jack or 3.5mm jack. It comes with handles, stand and screws and is desirable. The handles are soldered crooked so it's good to have a soldering iron on hand if you want to straighten them out.