Large stage volume can easily cause the acoustic guitar to feedback, which makes a lot of unwanted noise. Using the notch filter on the Stageman Floor can help you to cut the resonating frequency and make it more comfortable to play on stage.
But remember that some other stage conditions can also cause signal feedback – please also check the guitar and speaker (or monitor) position, and guitar mic(s). And make sure to set everything correctly to lower the chance of causing signal feedback.
And usually a guitar pick or your fingernail causes some high-frequency noise. You can use the Notch Filter to get a much better clean sound.
You can optimize the preamp input according to your guitar pickup type by selecting Piezo or Magnetic for better signal processing. It has a built-in FX Loop that allows you to insert external effect units to the Stageman Floor by using a TRS cable. It also works great for various acoustic instruments like the violin, mandolin, banjo and many more.