Mackie AM4160 Quick Start Guide - Page 2

INPUT 1 456 3 7 INPUT 2 456 3 7 INPUT LEVELS INPUT 3 456 3 7 INPUT 4 456 3 7 AUX 456 3 7 2 82 82 82 82 8 1 0 9 10 1 0 9 10 1 0 9 10 1 0 9 10 1 0 9 10 AUX 1 2 EQ LOW 202 4 4 HIGH 202 4 4 6 66 6 8 -10 8 +10 8 -10 8 +10 Front Panel Features Rear Panel Features INPUT LEVELS knobs are used to adjust the volume of the sound sources connected to INPUTs 1-4 and AUX IN. To prevent the levels from being modified, the knobs can be removed and the holes can be covered using the supplied inserts. AUX selector is used to select the AUX IN signal that is routed to the output. Only one AUX IN can be selected at a time. LOW EQ is a shelving filter that provides 12 dB of boost and cut below 100Hz. HIGH EQ is a shelving filter that provides 12 dB of boost and cut above 10kHz. VOLUME is a master volume control used to adjust the overall volume of the signal at the POWER OUTPUTS. The POWER switch turns the AM4000 Series on and off. The OVERLOAD indicator lights when the amplifier is operating in overload, a condition generally caused by a problem on the speaker line. When the amplifier is switched on, the OVERLOAD light comes on for a few seconds. This is normal and does not indicate a problem. POWER INPUT provides a means to connect an external 24 VDC power supply or battery as an alternative or backup power source. The AM4000 Series seamlessly switches to the backup supply if there's an AC power loss. When both AC power and 24 VDC power are connected, the DC power is switched off. Note: The unit is not equipped with battery charging capabilities. The D.C. FUSE protects the DC POWER INPUT circuit. Replace with the same type fuse only. POWER OUTPUTS are screw-terminal connections for connecting speakers to the 4-ohm, 25V, 50V, 70V, or 100V outputs. WARNING: To prevent the risk of electric shock, never touch the bare wires coming from the output terminals of the amplifier when it is switched on. When the connections have been made, insulate the output terminals of the amplifier using the protective cover provided. AM 4160 - P.A. AMPLIFIER OVERLOAD SIGNAL PEAK VOLUME 5 4 6 3 7 2 8 1 0 9 10 ON POWER Constant-Impedance Output The total impedance of the speakers and cable connected to the "4Ω" constantimpedance output should be 4 ohms. Connect the "4Ω" terminal to the "+" (HIGH) speaker terminal, and the "0" terminal to the "-" (LOW) speaker terminal. Constant-Voltage Output In a constant-voltage system, each speaker must be equipped with a line transformer having an input voltage equal to that of the speaker line (e.g., 25V, 50V, 70V, or 100V). Typically, these line transformers have selectable power taps (i.e., 2.5W, 5W, 10W) for connecting to the constant-voltage line. CAUTION: The sum of the wattage values of the speakers must not exceed the output power of the amplifier. Connect the appropriate POWER OUTPUT voltage terminal to the "+" (HIGH) leg and the "0" terminal to the "-" (LOW) leg of the distributed speaker system. The ground ( ) terminal is internally connected to the chassis and safety ground on the AC linecord. The INPUT 1 IN terminals are parallel with the INPUT 1 XLR connector and accept a balanced mic or line-level signal. INPUT 1 has a priority function for paging INPUT 1 Pin 3 Pin 2 Pin 1 purposes, and attenuates all other inputs when a signal is present at its input. Use the VOICE THR. control to adjust IN PRIORITY GND INPUT 1 2 1 3 XLR to Terminal Strip Cross-Reference the threshold for the voice-activated circuit. Activation of the priority function can also be accomplished using the INPUT 1 PRIORITY terminal. The INPUT 1 PRIORITY terminal activates the priority function for INPUT 1 by using an external normally-open switch to shortcircuit the INPUT 1 PRIORITY terminal to the GND (ground) terminal. When the INPUT 1 PRIORITY function is enabled, all other inputs are muted (no signal is transmitted to the outputs). An internal jumper changes the priority function so that the other inputs are attenuated rather than completely muted. Enabling the INPUT 1 PRIORITY function also enables the Vdc LED and Vdc 300mA outputs on the COMMANDS terminal strip. This GND terminal is the common connection point for INPUT 1 IN and PRIORITY. The Vdc LED terminal is active when INPUT 1 PRIORITY or COMMANDS PRIORITY is enabled. This provides 18 VDC for driving an LED to indicate when the INPUT 1 PRIORITY has been activated. The Vdc 300mA terminal is also active when INPUT 1 PRIORITY or COMMANDS PRIORITY is enabled. This provides 18 VDC with a maximum output capacity of 300mA for driving an auxiliary relay. The SIGNAL indicator lights when a signal is present at the POWER OUTPUTS. The PEAK indicator lights when the output signal is approaching clipping. POWER INPUT + 24V D.C. - D.C. FUSE POWER OUTPUTS POWER OUTPUTS INPUT 1 COMMANDS The ON indicator lights when the AM4000 is turned on and ready for operation. 0 50V 70V 100V TAPE OUT PRE OUT 0 4 25V AUX IN IN INPUT 1 PRIORITY GND INPUT 2 Vdc LED Vdc 300mA PRIORITY GND INPUT 3 INPUT 4 FILTER LINE 50/60 Hz-115/230V VOLTAGE SELECTOR CHIME LEVEL - + OUTPUT LEVEL - + L L R R MAIN IN 1 L VOICE THR. R 2 - + CONCEIVED, DESIGNED, AND MANUFACTURED BY MACKIE INDUSTRIAL • MADE IN ITALY • PATENTS PENDING • COPYRIGHT ©1999 THE FOLLOWING ARE TRADEMARKS/REGISTERED TRADEMARKS OF MACKIE DESIGN INC.: "MACKIE", "MACKIE INDUSTRIAL", & THE "RUNNING MAN" FIGURE MIC/LINE PHANTOM 24V LINE MIC OFF ON CAUTION: ELECTRIC SHOCK HAZARD DO NOT REMOVE COVER REFER SERVICING TO QUALIFIED PERSONNEL SEE INSTRUCTION MANUAL H.P. L.P. OFF ON