Review on Nobsound 100W Full Frequency Mono Channel Digital Power Amplifier Audio Mini Amp (Black) – Superior Sound Amplification for Audiophiles by Nathan Hutchinson

Purchased to power one speaker per subwoofer channel. I paid €34 for the amp alone. It said I could use any 5-19V DC power supply. I already had a good 19V DC power supply, so I didn't buy their $14 power supply. But the connector on my PS didn't fit. In fact, out of the 6 hp I have, not a single plug will fit into the power jack on this amp. It would be better if the amplifier had screw terminals for power supply. But since I didn't want to buy their PS, I sent the amp back. Instead I got a Kinter K3118 for $23 including horsepower. This is a stereo amp but I only use the left channel for the subwoofer.