User manual MACKIE U420

[. . . ] 4-Channel Line Mixer with FireWire OWNER'S MANUAL 1 U -14 U +14 LEVEL SET 2 U -14 +14 U POWER -14 3 U +14 U LEVEL SET 4 U -14 +14 U GAIN GAIN EQ HIGH EQ HIGH L KILL R OL 10 7 KILL KILL +10 U +10 U +10 U KILL +10 U MID KILL 4 KILL MID KILL +10 U +10 U 0 4 10 +10 U KILL +10 U LOW KILL 20 KILL LOW KILL +10 +10 +10 KILL +10 AUX O O AUX MAX O O O O MAX O O MAX FW IN PHONES MAX O O MAX O O MAX U LEVEL U LOOP OUT U LEVEL U O O MAX O O MAX O O MAX O O MAX O O MAX U. 420 4-Channel Line Mixer ImportantSafetyInstructions 1. Donotblockanyventilationopenings. Installinaccordancewiththe manufacturer'sinstructions. Donotinstallnearanyheatsourcessuchasradiators, heatregisters, stoves, orotherapparatus(includingamplifiers)thatproduceheat. Donotdefeatthesafetypurposeofthepolarizedorgrounding-type plug. Apolarizedplughastwobladeswithonewiderthantheother. [. . . ] (Word: DJs find it very useful to have EQ controls with a kill position, in their fast-paced beat-based world. ) 1. 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 are set to more than minimum. The aux bus feeds the aux outputs [5], typically out to an external processor. Each channel's stereo signal retains it's stereo image as it is sent to the aux bus. This is great for keyboard players who work with stereo sounds from stereo effects processors. A look at the block diagram may shed some light on the aux signal path, but you can skip this part if you like. The following diagram shows just one channel, but each channel adds to the aux bus and main bus in the same way. Level Set L Gain 3-Band EQ LO MID HI Owner's Manual Level R LO MID HI L Main R Aux L Aux R L Aux Out L 1. HIGH EQ This gives up to 10 dB of boost for the frequency range above 4 kHz, and the highs are muted in the kill position. In the center position U, high EQ has no effect. Use it to add sizzle to cymbals, and an overall sense of transparency, or edge to keyboards, vocals, guitar and bacon frying. Turn it down a little to reduce sibilance, or to hide tape hiss. Aux R Aux Sum Aux Out R The channel signals go through the preamplifier and into the EQ. The level control [17] allows you to adjust how much of the channel appears on the main mix bus. The aux control [16] allows you to adjust how much of each channel appears on the aux bus. · · The aux output is affected by the gain, EQ, and aux level of each channel. The aux output is not affected by the level control of each channel, and it is independent of the main mix bus. 14. MID EQ This gives up to 10 dB of boost for frequencies centered around 1 kHz, and the mid range is muted in the kill position. In the center position U, mid EQ has no effect. Midrange EQ is often thought of as the most dynamic, because the frequencies that define any particular sound are almost always found in this range. 15. LOW EQ This gives up to 10 dB of boost for the frequency range below 300 Hz, and the lows are muted in the kill position. In the center position U, low EQ has no effect. The frequency range below 300 Hz represents the realm of bass drums, bass guitar, fat synth patches, and lower down to some really serious male singers. For an example, you could set up a stage monitor for the guitar player. [. . . ] 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. LOUD Technologies may, at our option, require proof of the original date of purchase in the form of a dated copy of the original dealer's invoice or sales receipt. Final determination of warranty coverage lies solely with LOUD Technologies. [. . . ]