Alto Professional Stealth Wireless Guide D'utilisation page 65

Return Information
A return merchant authorization number must be obtained from your local Alto Pro representative. For
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your representative go to altoprofessional.com.
A copy of the original sales receipt must also be included for the equipment to be repaired under warranty.
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The faulty equipment must be packed in its original packaging.
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One additional outer layer of packaging must be included to ensure product safety. Failure to do so may
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inadequately protect the equipment in transit and therefore jeopardize the warranty.
Alto Pro will not accept COD shipments and no call tags will be issued for merchandise return.
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Alto Pro will not return repaired merchandise to customers by priority service except by written request
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at the customer's cost. Requests must be submitted in writing with returned merchandise.
The defective Alto Pro equipment should be sent freight prepaid with the return merchant authorization
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number printed clearly on the outer packaging and original sales receipt enclosed to your local service center.
Very Important
Please read this section before connecting this unit to your system:
For optimum performance:
• All slide faders are subject to wear. Excessive force can wear out the faders quickly. User-replaceable
slide faders are not covered by our warranty.
• Never use spray cleaners on the slide controls. Residues cause excessive dirt build-up and this will void
your warranty. In normal use, slide controls can last for many years. If they malfunction (usually because
of a dirty or dusty environment), consult a professional technician.
• Always make sure that AC power is off while making any connections.
• Use appropriate cables throughout your system. Do not use excessively long cables (i.e. over 32 feet / 10
meters). Be sure plugs and jacks are tightly mated. Loose connections can cause hum, noise, or
intermittents that could easily damage your speakers. Make the input and output connections with readily
available low-capacitance stereo cables. Cable quality makes a big difference in audio fidelity and "punch."
See your Alto Pro dealer or an electronics or audio specialist store if you are not sure which cables to use.
• Never attempt to make any adjustments other than those described in this manual, or repairs. Take the
unit to your dealer or to an authorized Alto Pro service center.
• Always remember: turn amps on last and off first. Begin with master faders or volume controls on
minimum and the amplifier gain/input control(s) down. Wait 8–10 seconds before turning up the volume.
This prevents transients which may cause severe speaker damage.
• Use restraint when operating controls. Try to move them slowly. Rapid adjustments could damage
equipment due to amplifier clipping.
• Avoid amplifier "clipping" at all costs: this occurs when the red LEDs (usually on the front panel of most
professional power amplifiers) start flashing. "Clipping" is when the power amplifier is distorting and
working beyond its limits. Amplifier distortion is the main cause of speaker failure.
• To prevent fire or shock hazard, do not expose the unit to rain or moisture. Never place cans of beer,
soda, glasses of water or anything wet near or on top of the unit!
• Headphone outputs can be set to levels which can cause damage to your ears. Use caution.
• This unit may contain a microcomputer for signal processing and control functions. In very rare situations,
severe interference, noise from an external source, or static electricity may cause it to lockup. In the unlikely
event that this should happen, turn off the unit, wait at least five seconds, and then turn it back on again.
• Under rare circumstances, if this product is exposed to electromagnetic interference during use, there
may be a slight drop in signal-to-noise ratio.
• Intended electromagnetic environments: residential, commercial, light industrial, urban outdoors.
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