1 [PHONES] jack
This jack on the front panel lets you connect a pair of stereo
headphones to the P-150 for private listening. The internal
speakers will automatically be disconnected when you plug in
the headphones. The sound of the internal voices output from
the [OUTPUT] jacks is not affected.
2 Keyboard
This 88-key weighted action, touch-sensitive keyboard
incorporates Yamaha’s unique Action Effect II keyboard
technology, which gives it the genuine feel and response of a
real piano keyboard.
3 Speakers
These two built-in 13 cm speakers each provide an output of 20
watts. If you connect the P-150 to an external monitor system,
you may choose to turn the speakers off using the [SPEAKER]
switch located on the rear panel.