The volume of the microphone is low when using the Karaoke feature.
Depending on the microphone type, the balance between music and the volume of the microphone may not be adjusted properly. In this case, press the MIC VOL+/MIC VOL - buttons on the remote control to adjust the sound balance.
NOTE: In terms of balancing the music and volume of the microphone, setting the microphone volume over VOL23 is recommended.