Mackie M1400/M1400i Owner's Manual - Page 16

In addition to the binding posts, the M•1400 has Speakon® connectors for connecting the speakers to the amplifier. These are locking connectors that are easy to attach and are designed to handle high power levels into low-impedance loads. These connectors have become popular with many loudspeaker manufacturers because they provide a quick, yet safe and secure method of connecting speaker cables. Speakon connectors have a twist-locking mechanism that prevents them from being pulled out accidentally. Pin 1+ is positive (+) and Pin 1- is negative (-). Before making connections to an amp or reconfiguring an amp's signal routing, turn the amp's GAIN controls down, turn the POWER off, make the changes, turn the POWER back on, and then turn the GAIN controls back up. Although the M•1400 amplifier can handle "opens" (no connection) and "shorts" (positive and negative signal lines in direct contact), you don't want the speaker ends of live cables to zap every piece of equipment they touch as they're being dragged across the stage. 1+ 1- 1+ 1- 2- 2+ COLD HOT Speakon Connectors Ordinarily, applying a positive voltage to a speaker's positive input and negative voltage to the negative input results in an outward excursion of the woofer. But some woofers are built with reverse polarity, meaning that the above conditions result in an inward excursion. If you're not sure which type of speakers you have, take a look at their literature. If you're still not sure, here is a simple test: take a 1.5V flashlight battery and connect the positive terminal of the battery to the positive (+) input of the speaker, and connect the negative terminal of the battery to the negative (-) input of the speaker. Observe the motion of the speaker cone. It should move out when voltage is applied, and return to rest when voltage is removed. Make sure all the speakers in the system move in the same direction (there are a few exceptions - some speakers are deliberately designed with reverse-polarity woofers). CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR CONCEIVED AND DESIGNED BY MACKIE DESIGNS INC • WOODINVILLE • WA 98072 • USA • MADE IN CHINA • FABRIQUE AU CHINE • PATENTS PENDING • COPYRIGHT ©1997 SERIA (MONO BRIDGE) 1000 WATTS 8 OHM LOAD (STEREO) 500 W / 500 W 4 OHM LOAD OUTPUTS SUITABLE FOR CLASS 2 WIRING THE FOLLOWING ARE TRADEMARKS AND REGISTERED TRADEMARKS OF MACKIE DESIGN INC.: "MACKIE", "FR S MONO OUTPUTS CH - + BRIDGE CH SUITABLE 1 2 FOR CLASS 2 WIRING + + 120 VAC 60 Hz 1000 WATTS - - SPEAKER OUTPUTS INPUT The M•1400/M•1400i amplifier gives you a choice - it has the traditional XLR inputs, as well as 1/4" TRS (tip-ring-sleeve) input jacks. Sonically (and electrically) they're identical, so choose either one. Since these two inputs are in parallel (the THRU jacks are in parallel with the inputs as well), you shouldn't connect more than one source to the SIGNAL INPUT jacks. Each can be used with either balanced or unbalanced signals. 16