User manual MACKIE M800

[. . . ] FULL SYMMETRY DUAL DIFFERENTIAL HIGH CURRENT DESIGN PROFESSIONAL POWER AMPLIFIER CH OL 3v 16 2v 14 12 24 26 6 22 18 20 GAIN/dB GAIN/dB CH 3v SIG OL 1 ­3 ­6 ­9 ­20 CH STATUS 16 18 20 2 ON 2v 14 22 12 24 6 26 ­3 ­6 ­9 ­20 0 0 1&2 HOT SENSITIVITY 28 1v OFF 0 0 28 1v SENSITIVITY 1. 23v (+4dBu) NORM 1. 23v (+4dBu) POWER TM CAUTION 120 VAC 60 Hz 1500 WATTS RISK OF ELECTRIC SHOCK DO NOT OPEN TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. REFER SERVICING TO QUALIFIED PERSONNEL. WARNING: SERIAL NUMBER MANUFACTURING DATE (MONO BRIDGE) 800 WATTS 4 OHM LOAD MIN. 400 WATTS CH 2 OHMS LOAD MIN. AVIS: RISQUE DE CHOC ELECTRIQUE -- NE PAS OUVRIR CONCEIVED, DESIGNED, AND MANUFACTURED BY MACKIE DESIGNS INC · WOODINVILLE WA · 98072 · USA · MADE IN USA · PATENTS PENDING · COPYRIGHT ©1999 THE FOLLOWING ARE TRADEMARKS/REGISTERED TRADEMARKS OF MACKIE DESIGN INC. : "MACKIE" "FR SERIES" & THE "RUNNING MAN" FIGURE , , MONO BRIDGE CH INPUT LOW CUT FILTER CONSTANT DIRECTIVITY HORN EQ /AIR EQ CH AMP MODE 1 CHANNEL LIMITER CONSTANT DIRECTIVITY HORN EQ /AIR EQ 4. 5k Hz OFF ON STEREO MONO BRIDGE OFF ON OFF ON CHANNEL LOW CUT FILTER TYPICAL 35 Hz STAGE MONITOR 2 INPUT 100 Hz 1 TYPICAL 35 Hz STAGE MONITOR 2 4. 5k Hz 100 Hz + + AND WARRANTY REGISTRATION ­ BAL/UNBAL OFF AIR EQ ­ 170 Hz TYPICAL 2k Hz 6k Hz 2k Hz TYPICAL TYPICAL TYPICAL 6k Hz AIR EQ OFF 170 Hz BAL/UNBAL HIGH-CURRENT POWER AMPLIFIER M·800 OWNER'S MANUAL SPEAKER OUTPUTS THRU THRU CAUTION AVIS 7. Heat -- This Mackie product should be situated away from heat sources such as radiators, or other devices which produce heat. [. . . ] The M·800 power amplifier eliminates the need for any of these external devices -- it has the compensation circuitry already built in, and using it is a breeze. CONSTANT DIRECTIVITY HORN EQ /AIR EQ 4. 5k Hz OFF ON 2k Hz 6k Hz AIR EQ TYPICAL CD FREQUENCY Your compression drivers' spec sheet should have a suggested frequency for compensation boost. If so, just turn the CONSTANT DIRECTIVITY switch ON and set its knob to match that frequency. If your spec sheet doesn't have that information, you can simply adjust the frequency knob by ear, preferably using the same music as the actual performance (3. 5kHz is a good place to start). 15dB 10dB 5dB More on Constant Directivity Horns All high-frequency compression drivers have an inherent roll-off of about 6 dB per octave above about 3kHz. The exact frequency at which the roll-off occurs (called the mass breakpoint) depends on the materials used, the mass of the moving parts (diaphragm and voice coil) and the strength of the magnet. The CONSTANT DIRECTIVITY HORN EQ control on the M·800 compensates for this natural roll-off in the power response of the compression driver coupled to a CD horn, with the end result of flat-frequency response (constant) over a wide coverage angle (directivity). 0dB ­5dB 20Hz 100Hz 1kHz 10kHz 20kHz Constant Directivity EQ Even if you don't have CD horns, you can use the CONSTANT DIRECTIVITY feature to enhance your EQ curve. By setting the frequency knob fully clockwise, you introduce a very high-frequency boost to the signal (above 6kHz). And in Mackie-land, this gentle boost has a name: AIR, as seen on our SR series of consoles. By boosting these high frequencies, AIR will breathe life into your mix, making cymbals brighter and vocals silkier. Speaking of Mackie SR consoles: If you use the AIR feature on an SR console as well as the AIR feature just described on the M·800, you may be overdoing it. You won't hyper-ventilate or anything, but it might cause your audience to experience ear fatigue from too much highfrequency content. Too much of a good thing, perhaps. 15 AMP MODE This three-way switch determines what kind of amplifier you want the M·800 to be (or not to be -- what was the question?) The switch alters the input signal routing within the amplifier. Shipped from the factory, it is set to STEREO, correct for about 90% of applications (hence the TYPICAL indicator near it). The switch should only be configured when the amplifer is turned off. STEREO This is the typical setup for amplifying stereo signals. There are separate left and right inputs, and separate left and right outputs. The two channels are independent of each other. MONO This mode (also known as Dual-Mono) is used to send the same signal to each speaker. · The inputs are summed (before the GAIN controls) and the mix sent to both amplifier channels. · The speakers are connected as for normal stereo use. Some examples of using the BRIDGE mode: · Two M·800s can be used to create a powerful stereo system, each driving one speaker. · You can use one amp to power a mono system, such a center speaker or PA. · Multiple M·800s can be used in theater surround systems, each driving one speaker. Connect the positive side of the speaker cable to the CH 1 red (+) binding post. Connect the negative side of the speaker cable to the CH 2 red (+) binding post. WARNING: In BRIDGE mode, both connections to your speaker are live; that is, neither is grounded through the chassis (because the M·800 black binding posts are not used). [. . . ] Call Mackie at 800/258-6883, 8AM to 5PM Monday through Friday (Pacific Time) to get 1) The name and address of your nearest Mackie Authorized Service Center and 2) A return authorization (RA). You must have an RA number before taking your unit to a service center. Make sure that you have a copy of your FR Series sales receipt from the store where you bought the product. It is necessary to establish purchase date and thus determine whether or not your FR Series product is still under warranty. [. . . ]