Kenwood TK-3401DE - Manual (Page 15)

7
SWITCHING THE AUDIO OUTPUT
It is necessary to switch the audio output if you listen only
through the earphone (
2.5).
1 Switch the transceiver power OFF.
2 Press and hold the PTT switch and Side 2 key while turning
the transceiver power ON.
3 Continue to hold the PTT switch and Side 2 key until a
beep sounds.
• Repeat steps 1 to 3 to switch the audio output.
• When the audio output is switched to earphone, you will hear
the beep from the earphone; and a beep will sound from the
speaker when the audio output is switched to built-in speaker.