Mackie UP4000 Rear Panel Features, Constant-Impedance Output Outputs, Constant-Voltage Output

UP 4161 - P.A. AMPLIFIER

						STD-BY OVERLOAD SIGNAL PEAK	ON
		EQ			VOLUME
	LOW			HIGH	4	5	POWER
						6
2	0	2	2	0	2

37

4	4	4	4
6		6 6	6	2	8
8	8	8	8	1	9
-10	+10	-10	+10
				0	10

The ground () terminal is internally connected to the chassis and safety ground on the AC linecord.

The PRIORITY terminal activates the priority function for the BALANCED IN by using an external normally-open switch to short-circuit the PRIORITY terminal to the GND (ground) terminal. When the PRIORITY function is enabled, the UNBALANCED IN is muted (no signal from the UNBALANCED IN is transmitted to the

Front Panel Features Rear Panel Features

Constant-Impedance Output

outputs).

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.

Use the POWER switch to turn the UP4000 Series on and off.

The STD-BY indicator lights when the amplifier is in standby mode.

Note: Standby mode is disabled by default. An internal jumper (J1 on the input board) must be changed to enable standby mode. See Figure 1 on back page.

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 capability.

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 all connections have been made, insulate the output terminals of the amplifier using the protective cover provided.

The total impedance of the speakers and cable connected to the "4Ω" constant- impedance 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 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 GND terminal is the common connec- tion point for BALANCED IN and PRIORITY.

The BALANCED IN terminals are the main inputs for the amplifier and accept a balanced line-level signal (0 dBu nominal). Connect signal high (+) and low (–) as indicated below:

– +

PRIORITY GND

BALANCED

IN

The BALANCED IN has a priority function, and attenuates the UNBALANCED IN when closing an external normally-open switch connected between the PRIORITY terminal to the GND (ground) terminal.

When the OVERLOAD circuit is activated, the OVERL. 300mA output on the COMMANDS terminal strip is also activated.

The SIGNAL indicator lights when a signal is present at the POWER OUTPUTS.

The PEAK indicator lights when the output signal is approaching clipping.

The ON indicator lights when the AM4000 is turned on and ready for operation.

+	POWER INPUT	D.C. FUSE	POWER OUTPUTS	POWER OUTPUTS	INPUT	COMMANDS
	24V D.C.	-

0 50V 70V 100V 0 4 25V PRIORITY GND STAND GND OVERL. GND

						BY	300mA.
					BALANCED		max
						IN
						FILTER	PARALLEL OUT
	CAUTION	WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT	SERIAL NUMBER	MANUFACTURING DATE
VOLTAGE
		EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER.			H.P.	L.P.	SENSITIVITY
SELECTOR	RISK OF ELECTRIC SHOCK	NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
	DO NOT OPEN	AVIS: RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR					UNBALANCED IN
	REPLACE WITH THE SAME TYPE FUSE AND RATING.	UTILISE UN FUSIBLE DE RECHANGE DE MÊME TYPE.
	DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE	DEBRANCHER AVANT DE REMPLACER LE FUSIBLE
	CONCEIVED, DESIGNED, AND MANUFACTURED BY MACKIE INDUSTRIAL • MADE IN ITALY • PATENTS PENDING • COPYRIGHT ©1999					OFF	20dB
LINE	THE FOLLOWING ARE TRADEMARKS/REGISTERED TRADEMARKS OF MACKIE DESIGN INC.: "MACKIE", "MACKIE INDUSTRIAL", & THE "RUNNING MAN" FIGURE					ON	0dB

50/60 Hz-115/230V