Alto Mistral-400 Users Manual
R
LTO
User's Manual
MISTRAL 400
STEREO POWER AMPLIFIER
www.altoproaudio.com
Version 1.0 NOV. 2007
English
IMPORTANT SAFETY INSTRUCTION
CAUTION
RISK OFELECTRIC SHOCK
DO NOTOPEN
TO REDUCE THE RISK OF ELECTRIC SHOCK
PLEASE DO NOT REMOVE THE COVER OR
THE BACK PANEL OF THIS EQUIPMENT.
THERE ARE NO PARTS NEEDED BY USER
INSIDE THE EQUIPMENT. FOR SERVICE,
PLEASE CONTACT QUALIFIED SERVICE
CENTERS.
This symbol, wherever used, alerts you to the
presence of un insulated and dangerous voltages
within the product enclosure. These are voltages that
may be sufficient to constitute the risk of electric
shock or death.
This symbol, wherever used, alerts you to
important operating and maintenance instructions.
Please read.
Protective Ground Terminal
AC mains (Alternating Current)
Hazardous Live Terminal
ON: Denotes the product is turned on.
OFF: Denotes the product is turned off.
CAUTION
Describes precautions that should be observed to
prevent damage to the product.
1.
Read this Manual carefully before operation.
Keep this Manual in a safe place.
2.
Be aware of all warnings reported
3.
with this symbol.
4.
Keep this Equipment away from water and
moisture.
5.
Clean it only with dry cloth. Do not use
solvent or other chemicals.
6.
Do not damp or cover any cooling opening.
Install the equipment only in accordance with
the Manufacturer's instructions.
Power Cords are designed for your safety. Do
7.
not remove Ground connections! If the plug
does not fit your AC outlet, seek advice from
a qualified electrician. Protect the power
cord and plug from any physical stress to
avoid risk of electric shock. Do not place
heavy objects on the power cord. This could
cause electric shock or fire.
Unplug this equipment when unused for long
8.
periods of time or during a storm.
Refer all service to qualified service personnel
9.
only. Do not perform any servicing other than
those instructions contained within the
User's Manual.
To prevent fire and damage to the product,
10.
use only the recommended fuse type as
indicated in this manual. Do not short circuit
the fuse holder. Before replacing the fuse,
make sure that the product is OFF and
disconnected from the AC outlet.
WARNING
To reduce the risk of electric shock
and fire, do not expose this equipment
to moisture or rain.
Dispose of this product should
notbeplacedinmunicipalwaste
and should be separate collection.
MovethisEquipmentonlywithacart,
11.
stand, tripod, or bracket,
specified by the
manufacturer, or
sold with the
Equipment. When
a cart is used, use
caution when
moving the cart /
equipment
combination to
avoid possible
injury from tip over.
12.
Permanent hearing loss may be caused by
exposure to \ extremely high noise levels.
The US. Government's Occupational Safety
and Health Administration (OSHA) has
specified the permissible exposure to noise
level.
These are shown in the following chart:
HOURS X DAY
8
6
4
3
2
1,5
1
0,5
0,25 or less
According to OSHA, an exposure to high SPL in
excess of these limits may result in the loss of
heat. To avoid the potential damage of heat, it is
recommended that Personnel exposed to
equipment capable of generating high SPL use
hearing protection while such equipment is
under operation.
The apparatus shall be connected to a mains
socket outlet with a protective earthing
connection.
The mains plug or an appliance coupler is used
as the disconnect device, the disconnect device
shall remain readily operable.
EXAMPLE
SPL
Small gig
90
train
92
Subway train
95
High level desktop monitors
97
Classic music concert
100
102
105
110
115
Rock concert
IN THIS MANUAL:
1. INTRODUCTION.........................................................................1
2. FEATURES................................................................................1
3. CONTROL ELEMENTS................................................................2
4. APPLICATION............................................................................4
5. TECHNICAL SPECIFICATIONS
.......................................................7
6. WARRANTY...............................................................................8
1. INTRODUCTION
Thank you for your purchasing the MISTRAL 400.
The MISTRAL 400 is a line of high power, low profile, professional Power Amplifiers
with advanced features and great reliability. It delivers tremendous power in only
one rack space, providing high level performance under the most demanding
conditions. The amplifier contains two independent channels, each channel with
separate AC transformer secondaries and
clip
. The Power outputs employ standard power connectors and all the inputs
are electronically balanced.
Enjoy your MISTRAL 400 and make sure to read this Manual carefully before
operation.
LED indicators for limit, power on and
2. FEATURES
Mountable in a 19" unit (1U), stereo high power amplifier
Fantastic audio quality even with extremely high volume levels
Solid and durable can be mounted into a cabinet
User-controllable clip limiter
2 100 Watt EIAJ on 4 ohms for MISTRAL 400
Stereo (dual-channel) or bridge mono operating modes
Balanced XLR inputs to ensure noiseless long wiring
Neutrik Speak-on connectors for output
Single channel, bridge and bi-amp output wiring possibility
Front panel LED indicators for limit, power on and clip
Accurate gain control
Manufactured under QS9000, VDA 6.1 certified management system
1
SPOTLIGHT
3. CONTROL ELEMENTS
Front panel
2 31
LTO
45
5
1
POWER SWITCH
It switches the amplifier ON and OFF.
2
CLIP LED
When the signal distortion reaches or surpasses 0.5% , the LED lights up. This
means the output level of signal source is too high and it is time to reduce the
input level until the LED turns off.
3
OUTPUT LIMITER LED
When the unit limits the output signal, the LED lights up.
4
POWER LED
This LED lights up when the unit is powered on.
5
LEVEL CONTROLS (For CH1&CH2)
Adjust the output signal level to avoid signal distortion.
2
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