A Class D output section provides a powerful, lightweight solution to sound reinforcement requirements. Class D amplifiers have the advantage of having a very high-power conversion efficiency and less power dissipated as heat removing the need for large heat sinks which allows them to be lightweight, powerful and very cost effective.
Anti-Feedback control can be engaged and adjusted to eliminate the body resonance feedback often associated with amplified acoustic guitars at high volume levels. To eliminate body resonance feedback, switch the filter in and adjust the anti-feedback control until the body resonation reduces. You should find a “sweet spot on” the control where any feedback present disappears.
Keep things tidy and remove the need for a cable by connecting your audio source via a Bluetooth capable device. Once you have successfully paired your device, you typically will not need to repeat the pairing process.