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M•1400/M•1400i
OWNER’S MANUAL
™
HIGH-CURRENT POWER AMPLIFIER
FULL SYMMETRY DUAL DIFFERENTIAL HIGH CURRENT DESIGN PROFESSIONAL POWER AMPLIFIER
CH CH
CH GAIN/dB GAIN/dB CH
OL OL
3v 3v 1 2
1 20 20 2
18 22 –3 –3 18 22 INTERNAL STATUS ON
2v 2v
16 24 –6 –6 16 24 PROTECT
14 26 –9 –9 14 26 SHORT
–20 –20 TEMP STATUS OFF
8 28 8 28
CH
30 30
1& 2
1v 1v
COLD HOT
SENSITIVITY 1.23v (+4dBu) SENSITIVITY 1.23v (+4dBu)
SIG SIG POWER
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT
CAUTION S
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8. Power Sources — This Mackie product should be connected to a power supply only of the type described in these operation CAUTION AVIS instructions or as marked on this Mackie product. RISK OF ELECTRIC SHOCK DO NOT OPEN 9. Power Cord Protection — Power supply cords should be routed RISQUE DE CHOC ELECTRIQUE so that they are not likely to be walked upon or pinched by items NE PAS OUVRIR placed upon or against them, paying particular attention to cords at CAUTION: TO REDUCE THE RISK OF ELECTR
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Lend Me Your Ears According to OSHA, any exposure in excess of Exposure to extremely high these permissible limits could result in some hear- noise levels may cause per- ing loss. To ensure against potentially dangerous manent hearing loss. exposure to high sound pressure levels, it is recom- Individuals vary considerably mended that all persons exposed to equipment in susceptibility to noise-induced hearing loss, but capable of producing high sound pressure levels nearly everyone will lose some
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READ THIS PAGE! QUICK START 6. Determine which AMP MODE is best for your application: I got ants in my pants and I got to dance! • STEREO mode (separate left and right INSTALLATION inputs, separate left and right outputs) is the typical setup for amplifying stereo signals. The M•1400/M•1400i amp can be mounted in any • MONO mode (sometimes called Dual- standard rack system (see Mono mode – one mono input, two mono page 23), or placed horizon- outputs) is for sending a mono signal to tally on a
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8. In MONO and BRIDGE modes, connect an are flashing, turn down either the GAIN input cable to CHANNEL 1’s INPUT only, controls on the amp or the source signal’s and nothing into CHANNEL 2’s INPUT. output level controls (i.e., master faders). (You could plug into CHANNEL 2’s input, The point is: The OL LEDs should never it just won’t do anything.) light up. 9. In STEREO and MONO modes, connect 16. For quieter listening, it is preferable to speaker cables to the SPEAKER OUTPUTS adjust the amp’s
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HOW TO USE THIS MANUAL APPLICATION DIAGRAMS GENERAL PRECAUTIONS AND CONSIDERATIONS Mackie’s gang of illustrators have created easy-to-understand diagrams of popular studio This section discusses important things to and live-sound setups. Your setup will probably keep in mind when installing and using the be different in some way, but these diagrams M•1400/M•1400i, including rack mounting, AC will help you see the big picture so you can add power, and wiring. your own finishing touches. SERVICE I
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CONTENTS Lend Me Your Ears......................................................... 3 INTRODUCTION ............................................................ 3 READ THIS PAGE! .......................................................... 4 QUICK START ......................................................... 4 INSTALLATION........................................................ 4 CONNECTIONS AND SETTINGS ................................. 4 HOW TO USE THIS MANUAL ..................................
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APPLICATION DIAGRAMS TWO M•1400i’S: MAIN SPEAKERS AND STAGE MONITORS 8 FROM MIXING CONSOLE MAIN OUT L/R TYPICAL 35Hz STEREO/TYPICAL TYPICAL 35Hz CAUTION WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT CHANNEL / BRIDGE / MONO CHANNEL SERIAL NUMBER MANUFACTURING DATE AMP MODE EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER. 1 2 RISK OF ELECTRIC SHOCK NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. LOW CUT INPUT INPUT LOW CUT DO NOT OPEN STERE
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FROM MIXING CONSOLE FROM MIXING CONSOLE MAIN OUT MONITOR OUT TYPICAL 35Hz STEREO/TYPICAL STAGE MONITOR 100Hz CAUTION WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT SERIAL NUMBER MANUFACTURING DATE CHANNEL / BRIDGE / MONO AMP MODE CHANNEL EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER. 1 2 RISK OF ELECTRIC SHOCK NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. LOW CUT INPUT INPUT LOW CUT STEREO MONO DO NOT OPEN AVIS: RISQUE DE CHOC ELECTRIQ
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FROM ACTIVE CROSSOVER: HIGH-FREQUENCY L/R CONSTANT DIRECTIVITY HORNS 170Hz STEREO/TYPICAL 170Hz WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT CAUTION SERIAL NUMBER MANUFACTURING DATE CHANNEL / BRIDGE / MONO AMP MODE CHANNEL EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER. 1 2 RISK OF ELECTRIC SHOCK LOW CUT NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. LOW CUT INPUT INPUT DO NOT OPEN AVIS: RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR FILTER
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FEATURE DESCRIPTIONS GAIN Constant Gain vs. Constant Sensitivity These giant knobs control the levels to the There are two viewpoints, or philosophies, output section of the M•1400/M•1400i amplifi- regarding the gain structure of power amplifi- ers. You’ll notice that their travel is detented, ers — constant gain and constant sensitivity. meaning there are 40 built-in “resting points” Constant gain means that regardless of the so you can easily set both controls to the same output power of the
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You may wonder why we So what are the pros and cons of these two didn’t use just one stereo approaches? The reason some amplifier control to control both sides. manufacturers use the constant gain ap- That’s in case your applica- proach is because the noise specification tion requires a left/right looks better. It’s a fact of physics that as the imbalance (due to an irregu- gain of the amplifier increases, the circuit larly shaped room) or if you’re using the two noise is amplified and increases
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SIG SHORT SIG (short for “signal present”) is the lowest If this LED comes on, the M•1400/M•1400i step in the meters’ ladder. It senses the signal has detected a short circuit in either of the prior to the GAIN control, so when SIG is lit, outputs, meaning that the hot (+) and cold (–) you know the M•1400/M•1400i is receiving sig- speaker wires are touching, or a speaker itself nal. If it’s the only meter LED lit (meaning the is shorted out. Such a condition causes the other meter LEDs are not
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TEMP STATUS Be Aware: If the HOT LED comes on frequently, some- TEMP (short for temperature) is another thing is overworking the feature designed to keep your mind at ease. M•1400/M•1400i or it’s not Normally the COLD LED is lit, indicating that properly ventilated. Look the M•1400/M•1400i is working normally. at each of the “extreme conditions” described Under extreme conditions the amplifier may above and try to determine what is causing the overheat. You may ask, “What kind of extreme amplif
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1/4" If you shut down your The red posts are labeled “+,” which means system, turn off your ampli- positive. The black posts are labeled “–” for fiers first. When powering negative. You probably know the importance of up, turn on your amplifiers getting these terms correct — if one side is last. This way, equipment hooked up “in phase” and the other side is “out feeding the amp won’t “pop” or “thud” when it’s of phase,” you’ll be “out of work.” (By the way, powered up or down. although everyone
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In addition to the binding posts, the Before making connections ® M•1400 has Speakon connectors for connect- to an amp or reconfiguring ing the speakers to the amplifier. These are an amp’s signal routing, locking connectors that are easy to attach and turn the amp’s GAIN are designed to handle high power levels into controls down, turn the low-impedance loads. These connectors have POWER off, make the become popular with many loudspeaker manu- changes, turn the POWER back on, and then factur
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When connecting a balanced signal using Unbalanced TS (tip-sleeve) lines can be ac- the XLR or 1/4" jacks, they’re wired thusly, per commodated via the TRS jack. Make sure the AES (Audio Engineering Society) standards: cord terminates with a TS plug (like a guitar plug), or if it’s a TRS plug (like a headphone XLR TRS plug), make sure the ring is tied to the shield, Hot (+) Pin 2 Tip preferably at the source. Cold (–) Pin 3 Ring SLEEVE SLEEVE TIP Shield (Ground) Pin 1 Shield TIP 2 SHIELD RING (C
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THRU can’t reproduce — you can’t hear it, and worse yet, it’s a waste of amplifier power that can be Someday you’ll do a show at Carnegie Hall better used reproducing frequencies you can hear. and realize that one M•1400/M•1400i ampli- fier is just not going to do the job — you’ll need 5dB a six-foot-high rack full of ’em. That’s what the 0dB THRU jack is for. Simply plug the signal source –5dB outputs into the first amp’s INPUTs , patch from that amp’s THRU jacks to the next amp’s –10dB INPUTs
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CD Frequency More on Constant Directivity Horns Back in the early ’70s, radial Your compression drivers’ spec sheet should horns were the common have a suggested frequency for compensation mechanism for reproducing boost. If so, just turn the CONSTANT DIREC- high frequencies. Radial TIVITY switch ON and set its knob to match horns had a serious problem, that frequency. If your spec sheet doesn’t have though. The high frequencies that information, you can simply adjust the tended to beam straigh
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The AMP MODE switch determines the in- To use all the M•1400/M•1400i’s power to put signal routing within the M•1400/M•1400i drive one speaker cabinet using BRIDGE mode, amplifier. Shipped from the factory, the switch you’ll have to do four things: is set to STEREO. This is correct for about 90% 1. Turn off the power to the M•1400/M•1400i. of the applications using an amp like this 2. Set the AMP MODE switch to BRIDGE. (hence the TYPICAL indicator near it). But 3. Connect the positive side of t
