Review on Pemenol HiFi Bluetooth 5.0 Amplifier Board | 100W Digital Power, WiFi Clock | DIY Home Audio | Bluetooth, AUX, USB Input | Wireless Control | Alarm 12/24H by Ralph Banks

I've wanted to try one of these amplifier boards for a long time. I have edited/repaired hi-fi component stereos before they were labeled vintage. This amplifier board delivers an amazing amount of sound for a small unit. I powered it from a variable output DC power supply and tested it at 12 volts, 16 volts and 19 volts. The more power you require from the amplifier, the more input power is expected to be required. I first tested it as a headphone amp to boost my computer's performance. I used the Koss Pro 4AA kit which required a lot of power and I really saw the results I wanted. I then hooked up a set of Minimus 7 bookshelf speakers and was impressed with the room-filling sound. Add a subwoofer and you have an amazing computer sound system. The higher the input voltage, the more heat is generated, and a small pin is provided on the heatsink for the output IC. The board heats up with prolonged intensive use and can be useful when using a small fan when placed in a case. This would be great for a computer powered speaker system, or using sound from an I-Pod, or amplifying cell phone sound. The device has a digital clock and Bluetooth connectivity, as well as many other features that I haven't explored yet. It's not a Pioneer SX-1250, but as a small amp it's pretty amazing.