Class A Amplifiers are One of the most common, and tend to offer clear sound with extremely minimal distortion. The drawback is that they're able to get hot quite quickly. Among the issues that Kanto has experienced with its speakers in the past, and which Regrettably resurfaces in this article, https://www.bluetoothspeaker.top/portable-bluetooth-speakers-colorful-sound-with-rgb-light-stereo-speaker-wireless-speaker-with-led-light/