MACKIE M1400/M1400i - Manual (Page 16)

16
Speakon Connectors
COLD HOT
1+
1+
1–
1–
2–
2+
In addition to the binding posts, the
M•1400 has Speakon ® connectors for connect-
ing 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 manu-
facturers 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 con-
nection) 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.
Ordinarily, applying a posi-
tive voltage to a speaker’s
positive input and negative
voltage to the negative input
results in an outward excur-
sion of the woofer. But some
woofers are built with reverse polarity, mean-
ing 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 (+) in-
put of the speaker, and connect the negative
terminal of the battery to the negative (–) in-
put 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 deliber-
ately designed with reverse-polarity woofers).
SPEAKER OUTPUTS
120 VAC 60 Hz
1000 WATTS
CONCEIVED AND DESIGNED BY MACKIE DESIGNS INC • WOODINVILLE • WA
98072 • USA • MADE IN CHINA • FABRIQUE AU CHINE • PATENTS PENDING • COPYRIGHT ©1997
THE FOLLOWING ARE TRADEMARKS AND REGISTERED TRADEMARKS OF MACKIE DESIGN INC.: "MACKIE", "FR S
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
C A U T I O N SERIA
(MONO BRIDGE)
1000 WATTS
8 OHM LOAD
(STEREO)
500 W / 500 W
4 OHM LOAD
OUTPUTS
SUITABLE
FOR CLASS
2 WIRING
OUTPUTS
SUITABLE
FOR CLASS
2 WIRING
CH
1
CH
2
+
– –
+
MONO
BRIDGE
+ –
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 par-
allel with the inputs as well), you shouldn’t
connect more than one source to the SIGNAL
INPUT jacks. Each can be used with either bal-
anced or unbalanced signals.