User manual MACKIE U420D

[. . . ] 4-Channel Mic/Line Mixer with FireWire and DJ Features OWNER'S MANUAL 1 MIC +3 LEVEL SET 2 MIC +3 3 U +25 +50 LEVEL SET 4 U -14 +14 U GAIN +50 GAIN -22 U +25 -22 U POWER 48V -14 U +14 EQ HIGH 12kHz EQ HIGH -15 U +15 -15 U +15 L OL 10 7 R KILL U +10 KILL U +10 MID -15 600 MID KILL +15 -15 600 +15 4 0 1. 5k U +10 KILL U +10 150 1. 5k MID FREQ 150 4 10 20 KILL LOW +10 KILL 100 U 8k 100 U 8k +10 AUX LOW 80Hz -15 +15 -15 +15 O O AUX CUE U MAX O O LEVEL U MAX 48V O O MAX CUE O O MAX CUE O O MAX CUE O O MAX CUE CURVE O O +10 5 0 -5 -10 -20 O O FW IN MAX O O PHONES MAX SLOW FAST LOOP OUT 3 4 O O MAX U. 420d 4-Channel Mic/Line Mixer ImportantSafetyInstructions 1. Donotblockanyventilationopenings. Installinaccordancewiththe manufacturer'sinstructions. Donotinstallnearanyheatsourcessuchasradiators, heatregisters, stoves, orotherapparatus(includingamplifiers)thatproduceheat. Donotdefeatthesafetypurposeofthepolarizedorgrounding-type plug. Apolarizedplughastwobladeswithonewiderthantheother. [. . . ] The gain ranges from ­14 dB to +14 dB, and it should be adjusted so that the level set LEDs [10] are on for about half the time during your performance. At the center position, the low EQ has no effect on the signal. 1 U. 40d 4-Channel Mic/Line Mixer 4. AUX These stereo controls allow you to adjust how much of the channel signal is added to the aux bus. The aux bus contains the sum of all channels whose aux controls [24, or 17] are set to more than minimum. The aux bus feeds the aux outputs [5], typically out to an external processor. The aux bus is stereo, so the left and right aux signals are separate and may be used for feeding stereo processors for example. CURVE This switch affects how the crossfader operates, and allows for some fast crossfading DJ work: In the slow position (up), the crossfade from channel 3 to channel 4 occurs linearly over the complete movement of the crossfader. For example, channel 3 is maximum and channel 4 minimum when the crossfader is fully left, and channel 3 is minimum and channel 4 maximum when the crossfader is fully right. In the fast position (down), the crossfade from channel 3 to channel 4 occurs over a small movement of the crossfader. For example, channel 3 is maximum and channel 4 minimum when the crossfader is fully left, and channel 3 is minimum and channel 4 maximum when the crossfader is moved just slightly to the right. Owner's Manual 5. LEVEL These level controls allow you to adjust how much of the channel signals appear on the main mix bus. They have no effect on the level of signals going onto the aux bus, but they do affect the levels going onto the cue bus if the cue button [18] is pressed. After the level control, the stereo signals are sent through a voltage controlled amplifier (VCA) that is affected by the position of the crossfader [27]. 7. CROSSFADER The crossfader is used to fade between channel 3 and 4 in the main mix bus. It has no effect on the aux bus, or the headphones when cue is enabled When the crossfader moves left, then channel 3 increases in volume in the main outputs, while channel 4 decreases in volume. When the crossfader moves to the right, channel 4 increases while channel 3 decreases. With two turntables connected to channels 3 and 4, the crossfader allows you to set up and run a nice DJ system. The characteristics of how the crossfader affects the audio signal are determined by the curve switch [26]. Owner's Manual 17 U. 420d 4-Channel Mic/Line Mixer 0. METERS POWER 48V These meters have 8 LEDs each, ranging from ­20 to +13. 5 (OL). They indicate the stereo signal strength of the main mix after the main level control [36]. Typically, you want to see these meters bouncing between the "0" and the "+4" LEDs. It is okay if the OL LEDs light occasionally, but if they light frequently or continuously, turn down the main level control until the OL LEDs blink occasionally or not at all. L OL 10 7 4 0 4 10 20 R 1. [. . . ] The return ground shipment is covered for those units deemed by us to be under warranty. Note: You must have a sales receipt from an authorized Mackie dealer for your unit to be considered for warranty repair. IMPORTANT: Make sure that the Service Request Number is plainly written on the shipping carton. LOUD Technologies reserves the right to inspect any products that may be the subject of any warranty claims before repair or replacement is carried out. [. . . ]