1.) External Speaker - this is a 2-conductor, 1/4-inch speaker output jack. Rating is 8 Ohms minimum. For full power, use an 8-Ohm speaker load. Higher impedance loads will result in lower power levels to the speaker. The signal path to the internal speaker is disconnected when using this jack.
2.) Headphones - this is a 3-conductor, 1/8-inch, stereo jack. The amplifier’s internal speaker is disconnected when this jack is used.
3.) AUX In - this is a 3-conductor, 1/8-inch, stereo jack that allows playback from a Compact Disc, MP3 player, or other audio device. The volume is controlled by the device that is plugged into this jack.
4.) Balanced Line Out - this XLR jack is used to connect the amplifier to a mixer or other line level amplifier. The output for this jack is pre EQ, so only the gain setting will be reflected on this output.
