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•1400/M•1400i has a big beefy cord built in. Plug the power cord into an outlet that is capable of delivering the correct voltage for your model.

For current-delivery

purposes, the M•1400/

M•1400i’s voltage source (wall outlet, extension cords, or power strips)

must be capable of continuously delivering 15 amps (for 120V versions). And for safety rea- sons, 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” on page 25 for more details.

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 terminals 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•1400/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•1400/M•1400i in BRIDGE mode, this does not apply, (see BRIDGE on page 22).

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 (except they can’t be used in BRIDGE mode).

Bare Wire

1/4"

Spade Lug

G

N

D

 

 

 

Double Banana Plug

1CHANNEL / BRIDGE / MONO

LOW CUT

INPUT

FILTER

 

TYPICAL

BALANCED

OR

35 Hz

UNBALANCED

 

STAGE

 

 

MONITOR

 

 

100 Hz

 

OFF

170 Hz

 

 

CONSTANT DIRECTIVITY

 

HORN EQ/AIR EQ

4.5 kHz

ON

 

 

2k Hz

6k Hz

OFF

 

AIR EQ

 

 

TYPICAL

AMP MODE

STEREO

MONO

BRIDGE

TYPICAL

(CHS SUMMED)

 

OUTPUT APPLICATION

FULL

SUB

RANGE

WOOFER

LIMITER (CH1 & CH2)

FREQUENCY

 

STEREO

125Hz

TYPICAL

ON OFF

63Hz

THRU

THRU

INPUT

CHANNEL 2

LOW CUT

 

FILTER

BALANCED

TYPICAL

OR

UNBALANCED

35 Hz

 

 

STAGE

 

 

MONITOR

 

 

100 Hz

 

OFF

170 Hz

CONSTANT DIRECTIVITY

HORN EQ/AIR EQ

 

ON

4.5k Hz

 

 

 

2k Hz

6k Hz

OFF

 

AIR EQ

TYPICAL

 

 

15