Manuale d’uso / di manutenzione del prodotto M800 del fabbricante Mackie
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M•800 O WN E R ’ S MAN U AL HIGH-CURRENT POWER AMPLIFIER ™ ON OFF POWER PROFESSIONAL POWER AMPLIFIER FULL SY MMETRY DUAL DI FFERE NTIAL H IGH C URR ENT D ESI G N OL – 3 – 6 – 9 – 20 – 3 – 6 – 9 – 20 OL CH 1 28 26 24 18 20 16 22 14 12 6 0 0 1.
CAUTION AVIS RISK OF ELECTRIC SHOCK DO NOT OPEN RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER (OR BACK) NO USER-SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL ATTENTION: POUR EVITER LES RISQUES DE CHOC ELECTRIQUE, NE PAS ENLEVER LE COUVERCLE.
3 Part No. 820-079-00 Rev. B 3/2000 ©2000 Mackie Designs Inc., All Rights Reserved. Printed in the U.S.A. INTRODUCTION amplifier to handle is clipping.
4 QUICK ST AR T 6. Determine which AMP MODE is best for your application: • STEREO mode (separate left and right inputs, separate left and right outputs) is the typical setup for amplifying ster eo signals.
5 9. In STEREO and MONO , connect speaker cables to the SPEAKER OUTPUTS , either binding post or 1/4" TS: • The binding posts are wired r ed = positive (+) and black = negative (–) • The 1/4" TS connectors ar e wired tip = positive (+) and sleeve = negative (–) 10.
6 APPLICA TION DIAGRAMS Mackie’s gang of oppr essed illustrator droids have created easy-to-understand diagrams of popular studio and live-sound setups. FEA TURE DESCRIPTIONS: Each and every knob, switch, and connector on the M•800 power amplifier is explained in depth here.
7 M•80 0 : MONO OPERA TION CH 1 1 CHANNEL CH 2 SPEAKER OUTPUTS + – – + MONO BRIDGE BAL/UNBAL MONO BRIDGE OFF ON OFF ON OFF ON 120 VAC 60 Hz 1500 WATTS CONSTANT DIRECTIVITY HORN EQ /AIR EQ LOW CUT FILTER 170 Hz OFF 4.
8 M•80 0 : STEREO SYSTEM WITH CD HORNS M•80 0 : STEREO SYSTEM USING TWO AMPLIFIERS IN BRIDGED MODE CH 1 1 CHANNEL CH 2 SPEAKER OUTPUTS + – – + MONO BRIDGE BAL/UNBAL MONO BRIDGE OFF ON OFF ON OFF ON 120 VAC 60 Hz 1500 WATTS CONSTANT DIRECTIVITY HORN EQ /AIR EQ LOW CUT FILTER 170 Hz OFF 4.
9 APPLICA TION DIAGRAMS M•800 IN BRIDGE MODE WITH A BASS GUIT AR PREAMPLIFIER CH 1 1 CHANNEL CH 2 SPEAKER OUTPUTS + – – + MONO BRIDGE BAL/UNBAL MONO BRIDGE OFF ON OFF ON OFF ON 120 VAC 60 Hz 1500 WATTS CONSTANT DIRECTIVITY HORN EQ /AIR EQ LOW CUT FILTER 170 Hz OFF 4.
10 Here ar e some more examples of how you might use the GAIN controls: • When you are in a small room wher e loud volume is not requir ed, having the amp gain controls turned fully clockwise would r equire you to keep the mixer faders down exceptionally low .
11 METERS The meters indicate the output level in decibels refer enced to the clipping point of the amplifier . The top LED is labeled OL (short for Overload). If this comes on, the amplifier will start to dis- tort, and the audio signals may “clip”.
12 POWER CORD The M•800 is supplied with a detachable power cord. Make sure the power switch is off before firmly attaching the cord to the ampli- fier . Fit the other end into an AC outlet properly configured for the type of plug on the power cord and for the voltage rating of the amplifier .
13 If you’re using low imped- ance loads at high power levels, we r ecommend that you use the binding post speaker outputs rather than the 1/4" TS jacks. Al- though 1/4" jacks and plugs ar e convenient and easy to use, they are not designed to handle high-level currents.
14 In order to match the output bandwidth with your particular speaker system, the M•800 am- plifier has a tunable LOW CUT FIL TER. The frequencies ar e clearly marked along the knob’s travel: • Fully counterclockwise, the frequency is be- low 10Hz, effectively bypassing the filter .
15 CONST ANT DIRECTIVITY SWITCH If you don’t have constant directivity horns, you can leave this switch OFF . Compression drivers mounted on constant- directivity horns r equir e compensation in the form of a high-frequency boost, with its “knee” set somewhere between 2kHz and 6kHz.
16 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 appli- cations (hence the TYPICAL indicator near it).
17 LIMITER LIMITER ON (TYPICAL) . This is the normal configuration with protective limiting. LIMITER OFF is without protective limiting. The limiter is not designed to alter your sound — it’s just ther e to protect your speakers from the effects of clipping.
18 GENERAL PRECAUTIONS W ARNING: Bypassing the plug’s ground pin can be dan- gerous. NEVER do it! The AC current demand of an amplifier var - ies depending on several factors, including the crest factor and the duty cycle of the program material.
19 AC Power Distribution The majority of AC outlets encountered in homes and clubs are served by a 240V AC center-tapped service en- trance transformer .
20 • T urn the POWER off, check the speaker connections and make sur e that there ar e no strands of wire shorting across the speaker terminals. • Is the HOT LED lit? Make sur e there is cool air available at the front of the amplifier . Make sure there is room at the sides of the amplifier for warm air to exit.
21 As soon as the music gets loud, the amp shuts down! • Check the M•800’s meters. Be sure that OL is not lighting up frequently or continuously . • Can the amp breathe? The M•800 amps draw their ventilation air in from the front and out through the side panels.
22 APPENDIX B: T echnical Information For example, four 8-ohm speakers, con- nected in parallel, will equal a 2 ohm load (8 / 4 = 2). If the parallel loads aren’t all the same, things gets a little more complicated, but noth- ing that you can’t do with a simple calculator .
23 M•800 SPECIFICA TIONS Maximum Power: 175 watts per channel into 8 ohms 275 watts per channel into 4 ohms 400 watts per channel into 2 ohms 550 watts into 8 ohms bridged 800 watts into 4 ohms bridged Note: Power ratings are specified at 120VAC line voltages.
24 19.00" (48.3cm) 17.25" (43.8cm) 15.25" (38.7cm) 3.50" (8.9cm) 2U 16.25" (41.3cm) M•800 WEIGHT 28 lbs. 12.7 kg) Limiter Section: Complementary Positive and Negative Peak D.
25 M•800 BLOCK DIAGRAM CH 1 BALANCED LINE INPUT (TRS) CH 1 BALANCED LINE INPUT (XLR-F) LIMITER LIMITER ON OFF ON OFF LIMITER SWITCH LIMITER DETECTION LIMITER DETECTION ON OFF LOW CUT FIL TER FREQ CD.
26 APPENDIX C: Bi-amping and T ri-amping CH 1 OUT CH 2 OUT CH 1 IN CH 2 IN + – + – FR SERIES POWER AMPLIFIER (STEREO MODE) HIGH FREQUENCIES T O TWEETER LOW FREQUENCIES T O WOOFER TWO-WA Y SPEAKER .
27 A. Mackie warrants all materials, workmanship and proper operation of this FR Series product for a period of three years from the original date of purchase. If you complete the optional question- naire portion of the Product Registration Card, the warranty will be extended for an additional two years .
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Mackie M800 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Mackie M800 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Mackie M800 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Mackie M800 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Mackie M800, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Mackie M800.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Mackie M800. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Mackie M800 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
