The karaoke mixer worked at first as it was supposed to; after tweaking the settings, I found that the echo make a weird sound that never goes away

The sound is better than that in some professional private karaoke rooms.

does was it claims but sound is not great.

Great mixer sound and easy to use!

I tested this mixer for a week, but I could not tolerate the strong hissing sound which I could hear even when songs are playing, especially if the song is slow and a little quiet

I tested this mixer for a week, but I could not tolerate the strong hissing sound which I could hear even when songs are playing, especially if the song is slow and a little quiet