Mackie SA1521Z User Manual download pdf (Page 4)

REAR PANEL DESCRIPTION

1. MAIN INPUT

ThisisafemaleXLR-typeconnectorthat

accepts a balanced line-level signal from a

mixing console or other signal source.

2. LOOP OUT

ThisisamaleXLR-typeconnectorthat

produces exactly the same signal that is

connectedtotheMAININPUTjack.Useitto

daisy-chain several SA1521z's together off the

same signal source.

3. Level Control

This controls the overall signal level at the input to

the built-in power ampliﬁers. It ranges from –15 dB to

+5 dB of gain. The center detent is 0 dB (unity gain).

4. Power ON Indicator

WhenthePOWERswitchisturnedon,andthe

linecord is connected to an active AC power supply, this

indicator lights green to let you know that you’re ready

torockandroll.ThecoolblueLEDonthefrontofthe

cabinet works in the same way.

5. SIGNAL Present Indicator

ThisLEDilluminateswheneverthereisasignalpres-

entattheMAININPUTconnectorontherearpanel.

It senses the signal just after the level control, so if

thelevelcontrolisturneddown,theSIGNALPresent

indicator turns off.

6. LIMIT Indicator

The SA1521z has a built-in limiter that prevents the

ampliﬁer outputs from clipping or overdriving

thetransducers.TheLIMITindicatorlights

when the limiter is activated. It's okay for the

LIMITindicatortoblinkoccasionally,butifit

blinks frequently or lights continuously, turn

downthelevelcontroluntiltheLIMITindica-

tor only blinks occasionally.

7. THERMAL Indicator

There is also a thermal protection circuit that mon-

itors the internal temperature of the ampliﬁers and

heatsink. If the temperature should exceed a safe oper-

ating level, this indicator lights and the signal is muted to

allowtheamplierstocool.Whenthetemperaturecools

to a safe level once again, the thermal protection circuit

deactivates and normal operation continues.

Note: Activation of the thermal protection circuit is

an indication that you should take steps to avoid con-

tinued thermal problems. See “Thermal Considerations”

onpage6.

8. POWER Switch

UsethisswitchtoturntheSA1521zonandoff.Make

sure the level control is turned down before you turn it

on.

9. AC Receptacle

This is where you connect the AC linecord to provide

AC power to the SA1521z’s built-in power ampliﬁers.

PlugthelinecordintoanACsocketproperlycongured

for your particular model.

SA1521Z

ACTIVE SOUND REINFORCEMENT

SPEAKER SYSTEM

POWER

THERMAL

SIGNAL

LIMIT

LOOP OUT

MAIN INPUT

PARALLEL

0dB

-15 +5

REGISTERED TRADEMARKS OF LOUD TECHNOLOGIES INC.:

"MACKIE", AND THE "RUNNING MAN" FIGURE • PATENT PENDING

WARNING:

THIS SURFACE MAY REACH HIGH TEMPERATURE DURING

STANDARD USE. TO ENSURE PROPER OPERATION ALLOW A MINIMUM OF 6 INS.

OF CLEARANCE FROM THIS SURFACE AND ADEQUATE VENTILATION. TO REDUCE

THE RISK OF ELECTRIC SHOCK DO NOT REMOVE THIS PANEL OR ANY ATTACHED

COMPONENT. NO OPERATOR SERVICEABLE PARTS INSIDE. REFER SERVICING TO

QUALIFIED PERSONNEL. TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT

EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.

RISK OF ELECTRIC SHOCK

DO NOT OPEN

REPLACE WITH THE SAME TYPE FUSE AND RATING.

DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE

UTILISE UN FUSIBLE DE RECHANGE DE MÊME TYPE.

DEBRANCHER AVANT DE REMPLACER LE FUSIBLE

CAUTION

AVIS:

RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR

SERIAL NUMBER

MANUFACTURING DATE

1 2 3 4 5 6 7 8 9 10 11 12

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Mackie SA1521Z User Manual Page 4

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