User manual MACKIE 402-VLZ3

[. . . ] 402-VLZ3 4-Channel Premium Mic/Line Mixer OWNER'S MANUAL 402-VLZ3 1. Donotblockanyventilationopenings. Installinaccordancewiththemanufacturer'sinstructions. Donotinstallnearanyheatsourcessuchasradiators, heatregisters, stoves, orotherapparatus(including amplifiers)thatproduceheat. Donotdefeatthesafetypurposeofthepolarizedor grounding-typeplug. Apolarizedplughastwobladeswith onewiderthantheother. Agrounding-typeplughastwo bladesandathirdgroundingprong. Thewidebladeorthe thirdprongareprovidedforyoursafety. Iftheprovided plugdoesnotfitintoyouroutlet, consultanelectricianfor replacementoftheobsoleteoutlet. [. . . ] Trouble is, adding low EQ also boosts stage rumble, mic handling clunks and breath pops. Applying low-cut removes all those problems, so you can add low EQ without losing a woofer. PHANTOM POWER Most modern professional condenser mics are equipped for phantom power, which lets the mixer send low-current DC voltage to the mic's electronics through the same wires that carry audio. (Semi-pro condenser mics often have batteries to accomplish the same thing. ) "Phantom" owes its name to an ability to be "unseen" by dynamic mics (Shure SM57/SM58, for instance), which don't need external power and aren't affected by it anyway. The phantom power for both channels 1 and 2 is turned on and off together using the phantom [20] switch. Owner's Manual 13 402-VLZ3 6. INSTRUMENT SWITCH (Ch. 1­2) When this switch is pressed in, channel 1 or 2's line input can accept direct instrument-level signals from guitars or other instruments. They will be impedancematched to the line input, without the need for a DI box. When this switch is out, you can connect line-level sources such as CD players, MP3 players, keyboards, drum machines, and tape players. You will need a DI box if connecting instrument-level signals to the inputs of channel 3 and 4. They provide signal and impedance matching for the direct connection of guitars and other instruments to amplifiers and mixers. They convert unbalanced instrument-level signals to a balanced mic-level output. Normally, they just look like a funny little box with a 1/4" TS input at one end, and an XLR output at the other. The good thing is that you do not need them with the 402-VLZ3. for "unity gain, " meaning no change in signal level. Once you have adjusted the input signal to line-level, you can set every control at "U" and your signals will travel through the mixer at optimal levels. What's more, all the labels on our level controls are measured in decibels (dB), so you'll know what you're doing level-wise if you choose to change a control's settings. 2-BAND EQUALIZATION The 402-VLZ3 has 2-band equalization at carefully selected points -- low shelving at 80 Hz, and hi shelving at 12 kHz. "Shelving" means that the circuitry boosts or cuts all frequencies past the specified frequency. For example, rotating the low EQ knob 15 dB to the right boosts bass starting at 80 Hz and continuing down to the lowest note you never heard. We've designed a lot of boost and cut into each equalizer circuit, because we know everyone will occasionally need that. Equalize subtly and use the left sides of the knobs (cut), as well as the right (boost). Very few gold-record-album engineers ever use more than about 3 dB of EQ. If you need more than that, there's usually a better way to get it, such as placing a mic differently (or using a different kind of mic entirely). 7. LET'S TWIST A GAIN (Ch. 1­2) If you haven't already, please read the input level adjustment procedure on page 4. Gain adjusts the input sensitivity of the mic and line inputs connected to channels 1 and 2. [. . . ] Main mix knob down, channel level knobs down: ­103 dBu Main mix knob unity, channel level knobs down: ­98 dBu (102 dB Signal to Noise Ratio, ref +4 dBu) Main mix knob @ unity, and channel level knobs @ unity: ­92 dBu Impedances Mic in: All other inputs: Tape out: Phones output: All other outputs: 3. 4 kilohms 10 kilohms or greater 1. 0 kilohms 60 ohms 120 ohms EQ High Shelving Low Shelving ±15 dB @ 12 kHz ±15 dB @ 80 Hz Total Harmonic Distortion (THD) (1 kHz @ 35 dB gain) 20 Hz­80 kHz bandwidth <0. 005% 20 Hz­20 kHz bandwidth <0. 003% Power Consumption 8 watts (H x W x D) 7. 3" x 5. 8" x 1. 6" (185. 5 mm x 146. 9 mm x 40. 7 mm) Attenuation (Crosstalk) (1 kHz relative to 0 dBu, 20 Hz­20 kHz bandwidth, line in, 1/4" main out, gain @ unity. ) Main mix knob down: ­70 dBu Channel level knob down: ­94 dBu Weight With power supply Without power supply 3. 0 lb (1. 36 kg) 2. 5 lb (1. 1 kg) Frequency Response (Mic input to any output. ) 20 Hz to 50 kHz: +0 dB/­1 dB 20 Hz to 90 kHz: +0 dB/­3 dB LOUD Technologies Inc. is always boldly striving to improve our products by incorporating new and improved materials, components, and manufacturing methods. Therefore, we reserve the right to change these specifications at any time without notice. "Mackie, " and the "Running Man" are registered trademarks of LOUD Technologies Inc. [. . . ]