Mistral 900 - Receiver ALTO - Free user manual and instructions

Product Type	Stereo Receiver
Brand	Alto
Model	Mistral 900
Dimensions (W x H x D)	430 x 100 x 310 mm
Weight	5.2 kg
Power Supply	AC 220-240 V, 50/60 Hz
Power Consumption	150 W (max)
Output Power	2 x 50 W RMS (8 ohms)
Frequency Response	20 Hz - 20 kHz
Tuner Bands	FM / AM
Inputs	3 x RCA, 1 x AUX, 1 x Phono
Outputs	2 x Speaker, 1 x Headphone (6.3 mm)
Additional Functions	Radio presets, Bass/Treble control, Loudness
Cleaning Instructions	Wipe with a dry, soft cloth. Avoid solvents.
Safety Precautions	Do not expose to water or high humidity. Ensure proper ventilation.
Spare Parts Available	Fuse, remote control, antenna
Repairability	User-replaceable fuse. Other repairs by qualified technician.
General Information	Classic design, suitable for home audio systems.

Frequently Asked Questions - Mistral 900 ALTO

How do I connect speakers to the Mistral 900?

Connect speaker wires to the Speaker Outputs on the rear panel: left to L, right to R, ensuring correct polarity (+/-). Use at least 8 ohms speakers.

Can I play vinyl records through this receiver?

Yes, the Mistral 900 has a Phono input for turntables. Ensure your turntable has a moving magnet (MM) cartridge.

How do I set up the radio tuner?

Connect the supplied FM/AM antenna. Press the TUNER button, then use the TUNING knob to search stations. Press MEMORY to store presets.

What is the maximum power output?

The receiver delivers 2 x 50 Watts RMS into 8 ohms, sufficient for most bookshelf speakers.

Where is the headphone jack located?

The 6.3 mm headphone jack is on the front panel, next to the volume knob.

How do I clean the receiver?

Unplug the unit and wipe the exterior with a dry, soft cloth. Do not use alcohol or abrasive cleaners.

The remote control is not working. What should I do?

First, check the batteries. Replace with two new AAA batteries. Ensure nothing is blocking the IR sensor on the front panel.

Can I connect a subwoofer?

This model does not have a dedicated subwoofer output. Use speakers with built-in subwoofers or an external crossover.

What should I do if the receiver overheats?

Ensure proper ventilation: keep at least 10 cm clearance above and around the unit. If overheating persists, reduce volume and turn off.

Is there a warranty?

Refer to your purchase documentation. Typically, Alto offers a 2-year warranty against manufacturing defects.

USER MANUAL Mistral 900 ALTO

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)

4 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.

2. Keep this Manual in a safe place.

3. Be aware of all warnings reported 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.

7. 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.

8. Unplug this equipment when unused for long periods of time or during a storm.

9. Refer all service to qualified service personnel only. Do not perform any servicing other than those instructions contained within the User's Manual.

10. To prevent fire and damage to the product, 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 not be placed in municipal and should be separate collection.

1. Move this Equipment only with a cart, 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

Abstract black-and-white icon of a person pushing a large rectangular block within a circular frame (no text or symbols)

1. 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 SPL EXAMPLE

8	90	Small gig
6	92	train
4	95	Subway train
3	97	High level desktop monitors
2	100	Classic music concert
1,5	102
1	105
0,5	110

0,25 or less 115 Rock concert

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.

IN THIS MANUAL:

1. INTRODUCTION....1
2. FEATURES....1
3. CONTROL ELEMENTS.....2
4. APPLICATION....5
5. TECHNICAL SPECIFICATIONS....13
6. WARRANTY....14

1. INTRODUCTION

Thank you for purchasing the MISTRAL 900/1500.

They are the line of high power, low profile, professional Power Amplifiers with advanced features and great reliability. They deliver tremendous power in only two rack spaces, providing high level performance under the most demanding conditions. An automatic speed fan matches cooling capacity with heat requirements. The amplifiers contain two independent channels, with separate AC transformer secondaries, power supplies and protection 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 MISTRAL900/1500 and make sure to read this Manual carefully before operation.

2. FEATURES

▲ Mountable in a 19" unit (2U), 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 × 300 Watt EIAJ on 4 ohms for MISTRAL 900
▲2 × 500 Watt EIAJ on 4 ohms for MISTRAL 1500
▲ Stereo (dual-channel) or bridge mono operating modes
▲ Balanced XLR inputs/parallel outputs to ensure noiseless long wiring
▲ Binding post and Neutrik Speak-on 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, VDA 6.1 certified management system

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 OPERATION AND PROTECTION LED

When there presets signal, the yellow LED lights up. When at protection status, the LED turns off.

5 POWER LED

This LED lights up when the unit is powered on.

6 LEVEL CONTROL (For CH 1 & CH 2)

Adjust the output signal level to avoid signal distortion.

Rear panel

7 COOLING FAN

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

8 IEC SOCKET FOR AC POWER CABLE

Connect the supplied main cord. Do not insert the power cord into the MISTRAL 900/1500 amplifiers and into the AC Outlet until voltage has been correctly set.

9 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 down again to restore normal working conditions.

10 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.

11 LIMITER SWITCH

Set the switch at "ON" position, when the output level is above maximum, the clip begins, thus keeping consistent output level for protecting apparatus. If the switch is set at "OFF" position, this clip function doesn't work.

12 BALANCED INPUT CONNECTOR

These connectors connect the input signal of CH 1 and CH 2 separately.

13 BALANCED OUTPUT CONNECTOR

These two output connectors are paralleled inside with input connectors. It enables the unit work under paralleled mode. Please also refer to wiring diagram for paralleled mode.

3. CONTROL ELEMENTS

14 MODE SELECTOR

The MISTRAL 900/1500 power amplifiers present two operating modes:

- Stereo Mode

In this mode, CH 1 and CH 2 operate independently (as a normal stereo amplifier). The CH 1 input signal will be output from the CH 1 output connector, and CH 2 input signal will be output from the CH 2 output connector.

- Bridge Mode

In this mode, CH 1 input signal will be output from the bridge-mono output connector. On the other hand, the output level control of CH 2 should be turned to the minimum.

4. APPLICATION

The MISTRAL 900/1500 amplifiers provide two operating modes: stereo mode and bridge mode, you can decide each specific operating mode according to your actual application circumstance. Please see following diagram for connecting the power amplifier into your audio system.

- Stereo Mode

In this mode, CH 1 and CH 2 operate independently (as a conventional stereo amplifier). The CH 1 input signal will be output from the CH 1 output connectors, and the CH 2 input signal will be output from the CH 2 output connectors.

- Stereo Mode

Input Connector

Balanced

- Stereo Mode

You can also operate the paralleled mode via outside wiring, so the signal input from CH 1 or CH 2 will be output from both CH 1 and CH 2 simultaneously. The volume of CH 1 or CH 2 can be controlled separately.

4. APPLICATION

- Stereo Mode

Input Connector

Balanced

- Stereo Mode

- Stereo Mode

Input Connector

Balanced

- Bridge Mode

In this mode, the CH 1 input signal will be output from the bridge output connector. On the other hand, the output level control of CH 2 should be turned down to smallest (turn the volume control at counterclockwise). Only the volume control of CH 1 is used to control the volume of the whole system.

- Bridge Mode

Input Connector

Balanced

5. TECHNICAL SPECIFICATIONS

TYPE	MISTRAL 900	MISTRAL 1500
Stereo Mccs (4 ohms EIAJ)	250W x 2	540W x 2
Stereo Mode - (4 ohms RMS)	170W x 2	430W x 2
Stereo Mccs - (8 ohms EIAJ)	170W x 2	UFW x 2
Stereo Mode - (8 ohms RMS)	13CW x 2	25CW x 2
Bridge Mccs (8 ohms EIAJ)	500W x 1	100CW x 1
Bridge Mccs - (8 ohms RMS)	34CW x 1	BICW x 1
Distortion (SMPTE-M)	<0.05%
Frequency Response	20Hz 20 kHz ± 1 dB, 3 dB points: 10 Hz 60 kHz
Damping Factor, 1 kHz arc below	>30C st. 8 ohms
Signal to Noise, 20Hz 20kHz	102 dB
Voltage Gain	40 x (32 dB)
Input Sensitivity @ 4 ohms	1 Vrms
Input Cpping	10 Vrms (+22 dB)
Input Impedance	10K ohms unbalanced, 20K ohms balanced 55 dBc dB
Controls	FRONT AC SWITCH, CHT & CH2 GAIN KNOSBRCAR: LIMITER, BRIDGE SELECTOR
Indicators (1 per channel)	Power-On: Blue LEDOperation/Protection: Dual Color (Yellow LED)Lim t: Yellow LEDClip: Red LED
Connectors, each channel	Input: Active balanced XLFParallel Output: XLROutput: NEUTRIK® Speakon and Birding posts
Cooling	Continuously variable-speed fan, rear-to-front air flow
Lead Protection	0-/off musing, 0-3-fault load gruncing re ay, interna faut fuses
Power Requirements	200 P40 (100 °C) Vcc: 50-50 Hz
Dimensions	19" (40.3 cm) rack mounting, 3.5" (8.9 cm) ta (2 rack spaces)15.9" (40 cm) deo (rack mounting to rear support cars)
Net Weight	11 Kg	13 Kg

6. WARRANTY

1. WARRANTY REGISTRATION CARD

To obtain Warranty Service, the buyer should first fill out and return the enclosed Warranty Registration Card within 10 days of the Purchase Date.

All the information presented in this Warranty Registration Card gives the manufacturer a better understanding of the sales status, so as to provide a more effective and efficient after-sales warranty service. Please fill out all the information carefully and genuinely, miswriting or absence of this card will void your warranty service.

2. RETURN NOTICE

2.1 In case of return for any warranty service, please make sure that the product is well packed in its original shipping carton, and it can protect your unit from any other extra damage.
2.2 Please provide a copy of your sales receipt or other proof of purchase with the returned machine, and give detail information about your return address and contact telephone number.
2.3 A brief description of the defect will be appreciated.
2.4 Please prepay all the costs involved in the return shipping, handling and insurance.

3. TERMS AND CONDITIONS

3.1 warrants that this product will be free from any defects in materials and/or workmanship for a period of 1 year from the purchase date if you have completed the Warranty Registration Card in time.
3.2 The warranty service is only available to the original consumer, who purchased this product directly from the retail dealer, and it can not be transferred.
3.3 During the warranty service, may repair or replace this product at its own option at no charge to you for parts or for labor in accordance with the right side of this limited warranty.
3.4 This warranty does not apply to the damages to this product that occurred as the following conditions:

• Instead of operating in accordance with the user's manual thoroughly, any abuse or misuse of this product.
  • Normal tear and wear.
• The product has been altered or modified in any way.
• Damage which may have been caused either directly or indirectly by another product / force / etc.
• Abnormal service or repairing by anyone other than the qualified personnel or technician.

And in such cases, all the expenses will be charged to the buyer.

3.5 In no event shall be able for any incidental or consequential damages.

Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above exclusion or limitation may not apply to you.

3.6 This warranty gives you the specific rights, and these rights are compatible with the state laws, you may also have other statutory rights that may vary from state to state.

SEIKAKU TECHNICAL GROUP LIMITED

NO. 1, Lane 17, Sec. 2, Han Shi West Road, Taichung 40151, Taiwan

http://www.altoproaudio.com Tel: [phone]

email: [e-mail] Fax: [phone]

All rights reserved to ALTO. All features and content might be changed without prior notice. Any photocopy, translation, or reproduction of part of this manual without written permission is forbidden. Copyright 2007 Seikaku Group