Alto Mistral-2500 Users Manual

LTO

User's Manual

MISTRAL 2500/4000/6000

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.

Read this Manual carefully before operation. Keep this Manual in a safe place.

Be aware of all warnings reported

with this symbol.

Keep this Equipment away from water and moisture.

Clean it only with dry cloth. Do not use solvent or other chemicals.

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

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

periods of time or during a storm.

Refer all service to qualified service personnel

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.

Move this Equipment only with a cart,

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

train

Subway train

High level desktop monitors

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............................................................................5

5. TECHNICAL SPECIFICATIONS

6. WARRANTY.............................................................................14

.....................................................13

1. INTRODUCTION

Thank you for purchasing one of our MISTRAL stereo power amplifier.

The MISTRIAL 2500/4000/6000 are the line of high power, low profile, professional power amplifiers with advanced features and great reliability. An automatic speed fan matches cooling capacity with heat requirements. The amplifiers contains two independent channels, with separate AC transformer secondaries, power supplies and protections system. Each channel has independent protective circuitry against open circuit, short circuit, mismatched loads and over temperature and LED indicators for operating/protection, limit, power on and clip. The power outputs employ standard power connectors and all the inputs are electronically balanced.

Enjoy your MISTRAL stereo power amplifier and make sure to read this Manual carefully before operation.

2. FEATURES

Mountable in a 19" rack unit, 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 2 700 watt EIAJ on 4 ohms for MISTRAL 2500 2 1000 watt EIAJ on 4 ohms for MISTRAL 4000 2 1400 watt EIAJ on 4 ohms for MISTRAL 6000 Stereo (dual-channel) or bridge mono operating modes Balanced XLR inputs/parallel outputs to ensure noiseless long wiring Binding post and Neutrik Speakon connectors for output Single channel, bridge and bi-amp output wiring possibility Front panel LED indicators for operating/protection, limit, power on and clip Accurate gain control Independent DC and thermal overload protection on each channel automatically protects amplifier and speakers Over-heat protection for each channel Manufactured under QS9000, VDA6.1 certified management system

SPOTLIGHT

Front panel

3. CONTROL ELEMENTS

2 3

OPERATNG/ PROTECTON

POWERON

2500

CH2

CLP

LIMT

LTO

POWER SWITCH

CH1

OFF

POWER

1 4

StereoPower Amplifier

It switches the MISTRAL stereo power amplifier ON and OFF.

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.

OUTPUT LIMITER LED

When the unit limits the output signal, the LED lights up.

OPERATION AND PROTECTION LED

In normal operation, the LED is green; If the LED is red, it means the unit is in heat protection, no signal output at the time and over-heat inside the unit (the surface temperature of power transistor is 110 ), the temperature must be lowered through better ventilation and decrease the signal level etc. After the temperature dropped, the protection stop and meanwhile the LED turns off with the unit recover normal work.

POWER LED

This LED lights up when the unit is powered on.

LEVEL CONTROL (For CH1&CH2)

Adjust the output signal level to avoid signal distortion.

SPOTLIGHT

Rear panel

3. CONTROL ELEMENTS

BREAKER

MODE

ERIA

Appaaten s all nsutas t l jo dat u t g den ansu s il e t na ve k

CAUTION

WARNNG SHOCKH ZARD

DON TO EN

AVS RI QUE DE CH C LEC RQUE

CAUTON:

RE LA E W H HE S METY EFU EAND R T NG DSC NNE TSU PLY ORDBE ORE HANG G US

EP SOU R R

CH1

BRDGE MONO

CH2

NPUT INPUT

PARALLEL

OUTPUT

COOLING FAN

CH1

NEW TDE

BALANCED

NPUT

CH1

1+ 1-

POS NEG

CH2

2+ 2-

NPUT

PARALLEL

OUTPUT

BRDGE

1+ 2+

POS NEG

OUTPUT1

CH2

1+ 1-

POS NEG

OUT UT2

TP PIN 2 RINGP N 3 SLEEVE/PN 1

LM TER

O F ON

INPUT

TP PIN 2 RINGP N 3

CH2

SLEEVE/PN 1

132

NEW TDE

T REO

BALANCED

RDGE

NPUT

This fan secures enough cooling for your amplifier. The fan speed is electronically regulated depending on the temperature of the power devices.

NOTE:

For MISTRAL 2500/4000, the fans are on the rear panel. For MISTRAL 6000, the fan is on the front panel.

a. IEC SOCKET FOR AC POWER CABLE (For MISTRAL 2500/4000)

Connect the supplied main cord. Do not insert the power cord into the MISTRAL stereo power amplifier and into the AC Outlet until voltage has been correctly set.

b. POWER CORD (Only for MISTRAL 6000)

This is an IEC power cord. You can connect the plug of power cord to the mains. Please make sure the voltage accepted by the unit.

CIRCUIT BREAKER (Manual reset button)

This is an electronic fuse for protecting the unit from possible damage. When the unit is overloaded or the temperature inside the unit is too high, this push type button will spring out and disconnect the power supply. Push the Breaker to restore normal working conditions.

OUTPUT CONNECTOR

These connectors have two kinds: Binding post and Neutrik connector. You can choose proper connectors according to practical need. For your safety, please be careful when do connecting work.

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