QSC MX-1000a Bedienungsanleitung PDF herunterladen (Seite 3)

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.

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.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

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.

AVIS

RISQUE DE CHOC

ÉLECTRIQUE

NE PAS OUVRIR

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!

VORSICHT

GEFAHR EINES

ELEKTRISCHEN SCHLAGES.

NICHT ÖFFNEN!

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.

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