Mackie 1202-VLZ Pro Owner's Manual - Page 21

OUTPUT SECTION DESCRIPTION MAIN MIX As the name implies, this knob controls the levels of signals sent to the main outputs: XLR LEFT and RIGHT , 1⁄4" MAIN OUTS and RCA TAPE OUTPUT . All channels and AUX RETURNS that are not muted or turned fully down will wind up in the MAIN MIX. Fully counterclockwise is off, the center detent is unity gain, and fully clockwise provides 10dB additional gain. This additional gain will typically never be needed, but once again, it's nice to know it's there. This is the knob to turn down at the end of the song when you want The Great Fade-Out. VLZ MIX ARCHITECTURE When designing a mixing circuit, the lowest noise and best crosstalk specs are achieved by using Very Low Impedance (VLZ). To implement VLZ in a mixer, the power supply must be able to deliver plenty of current to the circuitry. That's why those "wall wart" mixers are often noisy-they can't power a VLZ circuit. At Mackie, audio quality is much more important than the price of wall warts. All of our mixers employ VLZ and built-in power supplies that deliver more than enough current, resulting in sonic specifications that rival consoles upwards of $50,000! SOURCE MATRIX Typically, the engineer sends the MAIN MIX to an audience (if live) or a mixdown deck (if recording). But what if the engineer needs to hear something other than the MAIN MIX? With the New Improved 1202-VLZ PRO, the engineer has several choices of what to listen to. This is one of those tricky parts, so buckle up. Via the SOURCE switches, you can choose to listen to any combination of MAIN MIX, ALT 3-4 and TAPE. By now, you probably know what the MAIN MIX is. ALT 3-4 is that additional stereo mix bus . TAPE is the stereo signal coming in from the TAPE INPUT RCA jacks . Selections made in the SOURCE matrix deliver stereo signals to the CONTROL ROOM, PHONES and meter display. With no switches engaged, there will be no signal at these outputs and no meter indication. The exception to that is the SOLO function . Regardless of the SOURCE matrix selection, engaging a channel's SOLO switch will replace that selection with the SOLO signal, also sent to the CONTROL ROOM, PHONES and right meter (the left meter becomes inactive). This is what makes the Level-Setting Procedure so easy to do. WARNING: Engaging both the TAPE and ASSIGN TO MAIN MIX buttons in the SOURCE matrix can create a feedback path between TAPE INPUT and TAPE OUTPUT. Make sure your tape deck is not in record, record-pause, or input monitor mode when you engage these switches, or make sure the CONTROL ROOM / SUBMIX level knob is fully counterclockwise (off). U U OO +10 AUX 1 MASTER PRE POST AUX 1 SELECT EFX TO MONITOR OO OO 1 +20 U NORMALLED 2 AUX +20 RETURN POWER CONTROL ROOM SOURCE MAIN MIX ALT 3-4 TAPE ASSIGN TO MAIN MIX U LEFT RIGHT 0dB=0dBu 28 CLIP 10 7 4 2 0 2 4 7 LEVEL SET 10 20 30 RUDE SOLO LIGHT U OO MAX CTL ROOM/SUBMIX OO +10dB MAIN MIX 21