QSC Audio MX3000a, MX2000a Speaker Damage, Speaker Output Shock Hazard, Rack Mounting Precautions

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: To reduce the rish of electric shock, do not remove the cover. No user-serviceable parts inside. Refer servicing to qualified service personnel.

WARNING: To prevent fire or electric shock, do not expose this equipment to rain or moisture.

AVIS

RISQUE DE CHOC ÉLECTRIQUE

NE PAS OUVRIR

ATTENTION: Pour eviter les risques de choc électrique, ne pas enlever le courvercle. Aucun entretien de pièces intérieures par l’usager. Confier l’entretien au personnel qualifié.

AVIS: Pour eviter les risques d’incendie ou d’électrocution, n’exposez pas cet article à la pluie ou a l’humidité.

VORSICHT

GEFAHR EINES

ELEKTRISCHEN SCHLAGES.

NICHT ÖFFNEN!

VORSICHT: Um das Risiko eines elektrischen Schlages zu vermindern, Abdeckung nicht entfernen! Keine Benutzer Wartungsteile im Innern. Wartung nur durch qualifiertes Wartungspersonal.

WARNUNG: Zur vermeidung von Feuer oder elektrischen Schlägen, das Gerät nicht mit Regen oder Feuchtigkeit in Berührung bringen!

SAFEGUARDS

Electrical energy can perform many useful functions. This unit has been engineered and manufactured to assure your personal safety. Improper use can result in potential electrical shock or fire hazards. In order not to defeat the safeguards, observe the following instruc- tions for its installation, use and servicing.

PRECAUTIONS

L’énergie électrique peut remplir de nombreuses fonctions utiles. Cet appariel a été conçu et réalisé pour assurer une sécurité personnelle entiére. Une utilisation impropre peut entraîner des risques d’électrocution ou d’incendie. Dans le but de ne pas rendre inutiles les mesures de sécurité, bien observer les instructions suivantes pour l’installation, l’utilisation et l’entretien de l’appareil.

I. WARNING NOTICES

SPEAKER DAMAGE

The MXa Series amplifiers are among the most powerful professional amplifiers available and is capable of pro- ducing much more power than many loudspeakers can handle. It is the user’s responsibility to use suitable speakers with the amplifier and to use them in a sensible way that will not cause damage.

QSC will not be responsible for blown speakers. Consult the speaker manufacturer for power-handling recom- mendations.

Either channel of the MX 3000a amplifier has special clip- limiting protection circuitry that reduces the signal level at the onset of heavy clipping. This not only allows the amplifier to operate at a high average power level without audible distortion occurring, but it also prevents the speakers’ being destroyed by excessive clipping. How- ever, if the amplifier is operating normally and your speakers fail anyway, it is virtually certain that they could not handle the high power, despite the lack of clipping.

Even if you reduce the gain using the amplifier’s front panel attenuator controls, it is still possible to reach full output power if the input signal level is high enough.

A single high-power crescendo can blow high-frequency drivers almost instantaneously, while low-frequency driv- ers can usually withstand very high, continuous power levels for a few seconds before they fail. Reduce power immediately if you hear any speaker “bottoming out”— harsh pops or cracking distortion that indicate that the speaker voice coil or diaphragm is striking the magnet assembly.

QSC recommends that you use amplifiers of this power range for more headroom (cleaner sound) rather than for increased volume.

SPEAKER OUTPUT SHOCK HAZARD

An MXa amplifier is capable of producing hazardous output voltages. To avoid electrical shock, do not touch any exposed speaker wiring while the amplifier is operat- ing.

RACK MOUNTING PRECAUTIONS

In portable racks, to avoid damage to either the amplifier mounting ears or the mounting rails, support the amplifier at all four corners. Contact the QSC Customer Service Department to order rear support brackets.

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