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MC850 Operations Manual Rev F 

Page 1 

Table of Contents

 

 

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MC850 Operation Manual 

 

1

 

Important safety instructions 

1.

 

Please read carefully prior to product installation or operation. 

2.

 

Read these instructions. 

3.

 

Keep these instructions. 

4.

 

Heed all warnings. 

5.

 

Follow all instructions. 

6.

 

Do not use this apparatus near water. 

7.

 

Clean only with dry cloth. 

8.

 

Do not block any ventilation openings. Install in accordance with manufacturer’s instructions. 

9.

 

Do not install near any heat sources such as radiators, heat registers, stoves, or other 

apparatus (including amplifiers) that produce heat. 

10.

 

Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has 

two blades with one wider than the other. A grounding type plug has two blades and a third 

grounding prong. The wide blade and/or the third prong are provided for your safety. If the 

provided plug does not fit into your outlet, consult an electrician for replacement of the 

obsolete outlet. 

11.

 

Protect the power cord from being walked on or pinched particularly at plugs, convenience 

receptacles, and the point they exit from the apparatus. 

12.

 

Only use attachments/accessories specified by the manufacturer. 

13.

 

Use only with the cart, stand, tripod, bracket, or table provided by the manufacturer, or sold 

with the apparatus. When a cart is used, use caution when moving the cart/apparatus 

combination to avoid injury from tip-over. 

14.

 

Unplug this apparatus during lightning storms or when unused for long periods of time. 

15.

 

Refer all servicing to qualified service personnel. Servicing is required when the apparatus has 

been damaged in any way, such as power-supply cord or plug is damaged, liquid has been 

spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or 

moisture, does not operate properly, or has been dropped. 

2

 

Approvals 

This 

equipment has been tested and found to be compliant with the limits for Class A Digital device 

pursuant to part 15 of the FCC rules. 

Summary of Contents for MC850 CV-D

Page 1: ...it into your outlet consult an electrician for replacement of the obsolete outlet 11 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point they exit from the apparatus 12 Only use attachments accessories specified by the manufacturer 13 Use only with the cart stand tripod bracket or table provided by the manufacturer or sold with the app...

Page 2: ...EDUCE THE RISK OF ELECTRICAL SHOCK DO NOT EXPOSE THIS AMPLIFIER TO RAIN OR MOISTURE DANGEROUS HIGH VOLTAGES ARE PRESENT INSIDE THE ENCLOSURE DO NOT OPEN THE CABINET REFER SERVICING TO QUALIFIED PERSONNEL ONLY Please refer to the following table for AC Line plug information Voltage Line plug according to standard 110 125 V US UL817 and CSA C22 2 no 42 220 230 V EUROPE CEE 7 page VII SR section 107 ...

Page 3: ...15 Class A If this product is not used in accordance with these operating instructions it may cause interference with to other equipment such as radio and television receivers 3 3 4 Speaker Damage Loudspeakers may be damaged or destroyed if overpowered Always check the loudspeaker s continuous and peak power ratings to prevent such an occurrence Do not rely solely on the amplifier s volume control...

Page 4: ... 3 3 5 Maintenance 3 4 Table of Contents 4 5 Welcome 6 5 1 Features 6 5 2 Unpacking and Visual Inspection 6 5 3 Installation and Setup 6 5 3 1 Rack Mounting 6 5 3 2 Cooling and Ventilation 6 5 3 3 Operating Voltage 7 6 Rear Panel 8 6 1 Operation 9 6 1 1 Dante Audio 9 6 1 2 RS 232 Control 9 6 1 3 Speaker Connections 10 7 MC850 Configuration and Status Application 13 7 1 MC850 System Status Screen 1...

Page 5: ...ntents Top 8 Specifications 20 9 Troubleshooting 21 10 Warranty Information 22 10 1 Warranty Summary 22 10 2 Eligibility Requirements 22 10 3 Non warranty Repairs 22 11 Return Procedure 23 11 1 Shipment Instructions 23 11 2 Packaging Instructions 23 ...

Page 6: ...All models offer control and status via the Ethernet control port using Stewart Audio s Multichannel Amplifier Control and Status application Output level control is also available over an RS 232 interface for legacy controllers 5 2 Unpacking and Visual Inspection Every Stewart Audio product is carefully tested and inspected before leaving the factory and should arrive in perfect condition If any ...

Page 7: ...Operating Voltage The MC850 uses an integral universal power supply that operates on AC mains from 100 240V at 50 or 60 Hz The power receptacle on the rear panel accepts IEC 60320 C13 power cords The MC850 has no power switch The amplifier will turn on automatically when AC power is connected to the device ...

Page 8: ...hing an unsafe level A flashing LED indicates that the amplifier has reached an unsafe internal temperature level and has shut down for protection The LED will remain flashing until a safe operating temperature is attained At that time the amplifier will automatically restart If this condition persists reassess airflow and cooling conditions 5 Power LED This green LED illuminates whenever AC power...

Page 9: ...media networking technology with near zero latency and synchronization Routing audio signals from Dante enabled transmitters to Dante enabled receivers is accomplished via the Dante Controller Software available from Audinate s web site Please visit their web site for detailed information regarding this technology system and network configuration troubleshooting and other support Note that the MC8...

Page 10: ...s of CHAN1 0x02 0x0A CHAN1 0x03 0x02 0x0A CHAN1 STATE4 0x03 1 CHAN selects the channel affected as follows 0x00 All channels 0x01 Channel 1 0x02 Channel 2 etc 2 LEVEL is the attenuation in decibels dB expressed as a hexadecimal 0x00 0x50 3 VALUE is the desired attenuation in decibels dB expressed as a hexadecimal 0x00 0x50 4 STATE is in the mute status where 0x00 is un muted 0x01 is muted Note tha...

Page 11: ...e designed to facilitate paralleling a number of high impedance speakers on a single output channel Ideally the output signal level is set to deliver nominally 70 7VRMS 100VRMS in Europe at the output terminals The output voltage is selected by positioning the 70 100V switch on the rear of the device to the appropriate position Each speaker transformer is then appropriately tapped to deliver the r...

Page 12: ...til the leads are held securely in place Inspect for possible shorts or broken wires NOTE Class 2 wiring must be used on the speaker terminals to comply with UL requirements CAUTION Do not connect either speaker terminal to ground This will cause a short circuit which may damage the amplifier speaker or both Similarly do not connect any speaker terminal to ground CAUTION The speaker terminals repr...

Page 13: ...device To connect to a specific device double click anywhere along the row describing that device 7 1 1 Program Drop down Menu There are two selections on the Program drop down menu The About option provides the version information for the application The Exit option exits the application 7 1 2 System Drop down Menu There are three options on the System drop down menu The Select option allows the ...

Page 14: ... entering the level in the box below the slider or by using the up down arrows on the right side of each level box The level can be adjusted in 0 5 dB steps 7 2 1 3 RS 232 Settings The MC850 Series of amplifiers are also equipped with an RS 232 port for volume control and status The RS 232 levels for each channel and the master level set by the RS 232 controller are indicated at the bottom of the ...

Page 15: ...low that the device s firmware version device name see Setup Tab Section 7 2 2 for details and model 7 2 1 7 Channel Status Indicators and Temperature Gauges To the right of the trim sliders are four Channel Status boxes that illuminate to indicate the amplifier status The MC850 actually uses four separate amplifiers each in BTL mode to provide power to the eight speaker loads The status of each a...

Page 16: ...e MC850 is to receive a control port IP address automatically from the DHCP server However if a static IP address is desired this section provides a mechanism to assign that address Use care when exercising this option as setting an IP address that is not in the same subnet as the controlling PC will result in a failure to discover the device 7 2 2 3 Channel Control Section To the right of the Nam...

Page 17: ...al levels are delivered to the load to prevent overdriving the amplifier 7 2 2 6 Power Allocation Section LZ and Channels 7 8 of the MXZ The low impedance output models LZ Model and Channels 7 8 of the MXZ model allow the user to allocate different audio power levels for each channel As delivered each channel is allocated 50Wrms Larger spaces may require more power while smaller ones may require l...

Page 18: ... 01 2000 00 00 00 The Event Log file may be cleared saved or printed by pressing the appropriate button 7 2 4 Load Test Tab The MC850 control and reporting application provides a convenient method of testing the amplifier output loads It does not continuously monitor load impedance nor does it measure impedance during the test process It is intended to detect significant changes in loads that woul...

Page 19: ... this case changing the volume will result in a variance reported by the application New reference values can be established at any time and are recommended whenever a change to the load on any channel is changed However once a new set of reference values is established the previous values cannot be restored For that reason a message pops up when Take Reference Values is selected to verify that th...

Page 20: ... 44 1 48 88 2 96 176 4 192 ksps Power Draw Power Saving Mode Idle 1 8 Power Full Power 4 1W standby 28W operational 103W 585W Amplifier Class D Control and Status RS 232 and Ethernet Dante Network Audio Input Connectors RJ 45 x 2 switched or redundant Output Connectors 5mm Euroblock LED Indicators Power Fault Signal x 8 Power Supply Input 100 240VAC 50 60Hz PFC Universal Input Construction Aluminu...

Page 21: ...r receiver in the Network View screen indicates that a Dante subscription has been established In the Device View screen for the MC850 amplifier the speaker symbols should be green not gray when a signal is routed to those receive channels and the channels have audio present See the Dante Help for more detailed information The amplifier or certain channels cycles on and off or clicks Check speaker...

Page 22: ...hich arise during the warranty period 3 years from date of purchase that are not a result of misuse The following actions will void your warranty The power cord or AC plug has been damaged through misuse The amplifier has been exposed to moisture or extreme temperatures The amplifier has been dropped items have been dropped on the amplifier or the enclosure has been damaged The amplifier has been ...

Page 23: ...nfirmation The service center is located at the following address Stewart Audio 14335 Cuesta Court Suite C Sonora CA 95370 Use a bold black marker and write the RA number on three sides of the box Record the RMA number for future reference The RA number can be used to check the repair status 11 2 Packaging Instructions Should Stewart Audio request that you ship your product to their service center...

Page 24: ...te to prevent damage during transit Make certain that the amplifier is NOT free to move within the package as this is the most common cause of damage 5 Securely seal the package with an adequate carton sealing tape 6 Do not use light boxes or peanuts NOTE Damage caused by poor packaging will not be covered under warranty ...

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