Mackie LM-3204 REAR-PANELCONNECTIONS, LINE INPUTS, MONO PATCHING, RING TIP, INSERTS—CHANNELS 1–4ONLY, Insert only to first click, For use as an effects loop

REAR-PANEL CONNECTIONS

With the exception of the handy Phones output jack, all of the connections to the LM-3204 are made on the rear panel of the unit, back in your equipment rack where all the cabling is lurking.

LINE INPUTS

There are 32 line inputs in the LM-3204, a left- right pair for each of the 16 input modules. The channel inputs are each electronically balanced, high impedance line inputs, accommodating a range of signals from nominal levels of less than – 10dB to over +4dBu.

The input jacks will also accept unbalanced line level inputs.

Each jack is wired as a TRS (Tip-Ring- Sleeve) 1⁄4" phone jack, commonly called a “stereo” phone jack. The tip of the jack is wired to the “high” (hot) side of the input circuitry, the ring is wired to the “low” (cold) side, and the sleeve is the circuit ground (earth) connection.

Standard TS (Tip-Sleeve) 1⁄4" phone plugs (often called “mono” plugs) may be used to bring unbalanced signals into the LM-3204. The sleeve of the TS plug will automatically connect the low side of the input jack to ground and unbalance the input.

		CAUTION	WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, D
			EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE C
	RISK OF ELECTRIC SHOCK
			NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIE
LM-3204 • STEREO • LINE • MIXER
		DO NOT OPEN	AVIS: RISC DE CHOC ELECTRIQUE NE PAS OUVRIR
CONCEIVED, DESIGNED, AND MANUFACTURED		REPLACE WITH THE SAME TYPE FUSE AND RATING.		UTILISE UN FUSIBLE DE RECHANGE DE
BY MACKIE DESIGNS INC • WOODINVILLE • WA		DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE		DEBRANCHER AVANT DE REMPLACER L
98072 • USA • MADE IN USA • FABRIQUE AU USA

	STEREO AUX RETURNS
1	2	3	4	16	15
(MONO)				(MONO)
L				L

R				R
		AUX SENDS		CONTROL ROOM
					OUTPUTS
1	2	3	4	L	R

MONO

LL

STEREOSTEREO

RR

L R

ALT 3/4

OUTPUTS

EXPANDER IN

USE ONLY WITH LM-3204E EXPANDERS.

MONO PATCHING

The stereo pair of input jacks connected to each input module is wired so that an input signal plugged only into the LEFT (Mono) jack will be applied to both the left and right input cir- cuits. Inserting a plug into the RIGHT input jack (with the LEFT input still plugged in) disables the mono switching and returns the input module to the stereo mode.

INSERTS—CHANNELS 1–4 ONLY

Stereo input modules 1 through 4 have channel insert jacks on the back panel. An insert jack allows you to tap the signal out of the circuit for processing in another piece of equipment and then return the processed audio back into the LM-3204.

The channel inserts occur just before the balance, gain and EQ circuits and controls.

Mackie inserts use 1⁄4" TRS phone jacks, and can be used in three different ways:

2.As a “direct output,” which also interrupts the signal to the output section. Use a 1⁄4" TS (mono) plug, and push it in all the way to the second click.

MONO PLUG

Direct out with no signal interruption to master.Insert only to first click

MONO PLUG

Direct out with signal interruption to master.Insert all the way in to the "second click"

STEREO

PLUG

RING TIPFor use as an effects loop.(TIP= send to effect, RING = return from effects)

1.As a “direct output,” with no interruption of the signal to the output section. Use a 1⁄4" TS (mono) plug, but insert it only to the first click.

ring	SEND	tip
tip	shield

this plug connects to the CR-1604	"ring"
	RETURN

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