13. CD INPUT: Use these RCA jacks to connect the line level (or headphones) output of a CD player, tape deck or rhythm machine to the amplifier. The signal level from these jacks is adjusted by the Master control (#12). If the signal from the source connected to these jacks is too strong, use the output level control on the source to adjust the signal to obtain the proper level for a good mix. 14. HEADPHONES: Use this jack to listen to the amplifier through a pair of stereo headphones. The internal speaker is disconnected when the headphones jack is used. CAUTION: To avoid possible damage to your hearing, do not use headphones for extended periods of time at extremely loud listening levels. 15. POWER: Use this switch to turn the amplifier on and off. The adjacent LED illuminates when the amplifier is turned on. 16. ELECTRONIC TUNER (top panel): This active electronic tuner is on whenever the amplifier is turned on, allowing you constant, �real-time� tuning. The tuner is fully chromatic � use the flat and sharp indicators until the LED between them illuminates, indicating proper tuning.
The Rear Panel (not shown):
17. AC LINE CORD: The grounded power cord should only be plugged into a grounded power outlet that meets all applicable electrical codes and is compatible with the voltage, power, and frequency requirements stated on the rear panel. Do not attempt to defeat the safety ground connection. 18. FOOTSWITCH: Connect a two-button footswitch (such as the Crate CFP-2) here for remote control of the channel selection/�blend� (see #5) and octave on/off. (When the Channel Switch [#5] is depressed, the footswitch switches between the Clean channel and the Distortion channel; when the switch is in the out position, the Clean channel is always active, and the footswitch turns the Distortion channel on and off, allowing you a blend of both channels.) 19. EXTERNAL SPEAKER: Use this jack to connect the amplifier to an external speaker cabinet (BT25 = 4 ohms minimum, BT50 = 8 ohms minimum). The internal speaker is disconnected when the external speaker jack is used.
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