Can I use a microphone and a line-in source at the same time with my powered speaker?

Yes, on most of our current powered speakers. These units come with multiple input channels, so you can mix more than one audio signal without an external mixer.

If your speaker has both a line-in source and a MIC input, you can use them at the same time. Plug your line-level source (a phone, laptop, or media player) into the line-in, connect your microphone to the MIC input, and set each channel's level to taste.