Mackie FR Series M-1400i Owner'S Manual Download Page 15

Page: 15 / 43

When you power up the M•1400i, a built-in

delay circuit prevents any pops or thumps from
being transmitted to the speakers due to turn-
on instability in the system.

Be sure the signal

driving the amplifier is turned down when
you first power up the system.

There are few

things as rude as 3 seconds of silence followed
by 225 watts of full-blast stereo sound! (Well,
maybe 225 kilowatts of accordian music...)

If you shut down your
system, turn off your ampli-
fiers first. When powering
up, turn on your amplifiers
last. This way, equipment

feeding the amp won’t “pop” or “thud” when it’s
powered up or down.

POWER CORD

We all know what a power cord is. The

M•1400i has a big beefy cord built in. Plug the
power cord into a 3-prong outlet that is capable
of delivering 120VAC at 15 amps.

For current-delivery
purposes, the M•1400i’s
voltage source (wall outlet,
extension cords, or power
strips) must be capable of

continuously delivering 15 amps. And for safety
reasons, that source must be a “3-prong” outlet
with hot, neutral, and ground terminals. We’re
dealing with some big-time electricity here —
don’t mess with it. See “AC Power Consider-
ations”

SPEAKER OUTPUTS

Some call them “GR” jacks, others call them

“Banana” jacks, but we prefer to call them
“Binding Posts.” You can call them whatever
you like (except late for supper). These termi-
nals are your standard fare.

To use the binding post outputs, you can

terminate your speaker cables with single or
double banana plugs, spade lugs, or leave them
unterminated: Unscrew the amp’s binding
posts enough to reveal the holes on their sides,
then insert your stripped wires (stripped about
3/8" back) into the holes and retighten the
posts (finger tight is fine — please don’t reef
on them with a wrench!). Be careful that no
runaway strands touch the chassis or other
terminals.

The red posts are labeled “+,” which means

positive. The black posts are labeled “–” for
negative. You probably know the importance of
getting these terms correct — if one side is
hooked up “in phase” and the other side is “out
of phase,” you’ll be “out of work.” (By the way,
although everyone says “phase” in this situa-
tion, the correct word is “polarity”... but it’s not
as much fun to say.)

Using high-quality stranded speaker cable

(16 gauge or thicker), connect the positive
outputs of the M•1400i to the positive inputs of
your speakers, and the negative outputs to the
negative inputs. The exception: If you’re using
the M•1400i in

BRIDGE

mode, this does

not apply. Please read on.

In addition to the binding posts, the M•1400i

also has 1/4" TS (tip-sleeve)

SPEAKER OUTPUTS

so you can use speaker cables with 1/4" TS
plugs. The tip is positive (+) and the shield is
negative (–). They’re wired in parallel with the
binding posts and behave exactly the same (ex-
cept they can’t be used in

BRIDGE

mode).

CHANNEL

63Hz

125Hz

CONSTANT DIRECTIVITY

HORN EQ /AIR EQ

CONSTANT DIRECTIVITY

HORN EQ /AIR EQ

INPUT

THRU

INPUT