CVA50-1 NET+ - Manual (Online)
Contents
1. When using a balanced input source and connector you must ensure that the hot cold and ground pins of the connector are matched up to the and ground pins of the CVA Series Euro Block connector re spectively Diagrams have been provided for standard XLR and TRS connectors Please refer to the manual of your input source in case it does not follow the standard pin out Input Connector Female XLR Input Connector Male TRS pie a Shield Connector enlarged to show detail NOTE The CVA Series of amplifiers do not accept TRS in puts wired for a stereo source TRS inputs should only be used for balanced mono inputs 2 4 2 Unbalanced Input Connections When using an unbalanced input source and connector a jumper must be added between the negative terminals and the ground terminals Once this has been done the unbalanced source can be connected to the positive and ground terminals Please refer to the manual of your input source in case it does not follow the standard pin out For your convenience pre wired connectors are available for purchase see the next page for details T NOTE A jumper is required for connecting an unbalanced input Input Connector Ground t ma Male RCA C x A jumper has been added between the 7 aA o Gron negative terminals and ground Input Connector Ground IN Male TS lt i2. All returns to the factory for service must be accompanied by a Return Authorization RA number One can be obtained by contacting Stewart Audio at 209 588 8111 or via e mail at support stewartaudio com NOTE Any defective products received without an RA number will be returned to sender at their expense If Stewart Audio is unable to contact the sender in 14 days the mer chandise will be considered scrap and may be disposed of 6 2 2 Shipment Instructions If Stewart Audio requests that you ship the defective product back to their service center please refer to the guide below To ensure prompt warranty service be sure to follow all instructions 1 Return Authorization RA is required for product being sent to the factory for service 2 See packing instructions in section 6 2 3 3 Ship the defective product using a method which provides for or der tracking or order confirmation The service center is located at the following address Stewart Audio 14335 Cuesta Court Suite C Sonora CA 95370 4 Use a bold black marker and write the RA number on three sides of the box 5 Record the RMA number for future reference The RA number can be used to check the repair status 6 2 3 Packaging Instructions Should Stewart Audio request that you ship your product to their ser vice center these instructions must be followed in order to ensure safe delivery If they are not followed Stewart Audio assumes no responsi bility for
3. A jumper has been added between the negative terminals and ground Ground Shield NOTE The CVA Series of amplifiers do not accept stereo A inputs Either one side must be selected from the stereo source or an overload protected Y cable must be used to sum them to mono It is highly recommended that you purchase the pre wired connectors mentioned on the next page Damage to source equipment can result from the 10 Pre wired unbalanced connectors are available for purchase from Stew art Audio These will allow for a quicker installation with less room for error when connecting the CVA Series amplifier to an unbalanced source The summing adapters will properly sum a stereo source for use with the mono input on the rear of the amplifier without causing sound cancellation Part numbers are found below the diagrams ADPT RCA ADPT SUMRCA ADPT SUM35 Mono Stereo Stereo Female RCA Female RCA Female 3 5mm 2 5 Output Connections Because of the differences in the way that constant voltage amplifiers work as opposed to a typical 8 ohm setup the wiring procedure and the gauge of wire used is very different Constant voltage systems and speakers use a smaller current flow than the typical 80hm systems and thus can use a higher gauge thinner diameter wire Please refer to the following g chart to choose the ap propriate wire gauge for your installation Distance Wire Gauge Up to 500ft 22 AWG 500 10
4. When left unused for a long period of time the power cord should be unplugged from the outlet Damaged Amplifiers requiring service should be repaired by a qualified service technician when The power cord or AC plug has been damaged Objects have fallen or liquid has spilled into the unit The amplifier has been exposed to rain or other moisture The amplifier does not appear to operate normally or exhibits a marked change in performance e The amplifier has been dropped or the enclosure damaged aon The user should not attempt to service the amplifier beyond that de scribed in the operating instructions All other servicing should be referred to qualified service personnel Table of Contents Important Safety INStrUCTIONS ett tee terre eter terres 2 Table Of CONTENtS sere e eres eet e eer ee ere ee ee reer ences 4 1 Welcome cc 5 sey 00 1s Con 5 1 2 Using this Manual eeeeeceereeeee teeter ee ee seer te eeeeeeees 5 2 SOUP irr eee eee ener ere ee err eee ert eee ee enaes 6 2 1 Setup PreCAUtiONS veer terete etter rte ee rere 6 2 2 Amplifier Installation cre iit e rere 6 2 3 Proper Cooling Considerations tees 8 2 4 Input CONNECTIONS ese eeee etter etter tee eter eee 9 2 5 Output CONNECTIONS verre tte te ttt trent 11 3 Operation ic ee eer eee e errr tnt EE EEEE 13 3 1 Operation Precautions eee te tt teeters 13 3 2 Controls Indicators and CONNECTOIS v ee eee eet tee 14 3 3 Da
5. control must be adjusted until the CLIP LED goes out for undistorted sound amplification 3 2 2 Controls NET Models Only All CVA Series controls are located on the rear of the unit There is no power switch so the amplifier will power up immediately after connect ed to a power source The rear panel contains a single volume knob The amplifier is set to run off of a line level source and the level should be adjusted for opti mum performance To adjust this knob you will need a small flat head screwdriver While a typical program source level is present spin the rotary knob as far clockwise as you can without hearing distortion or without the Clip indicator illuminating If the signal is distorting and the knob is all the way counter clockwise adjust the gain down at the source level 3 2 3 Signal Priority Switching NET Models Only The CVA50 1 NET amplifier includes selectable priority switching which allows either the network or local input to override the other in put depending on the switch setting The switch position should be set to the priority input the signal that will interrupt the normal program When audio is detected on that priority input the amplifier will mute the signal from the other normal input After an approximately 3 5 se cond period with no signal on the priority channel the normal signal will be un muted For example if a local microphone is to be used as a priority page set the priori
6. damaged goods and or accessories that are sent with your unit 23 6 2 3 Packaging Instructions cont 1 Please write the RA number on three sides of the box Include the Stewart Audio RA number inside the box and a brief description of the problem 2 You will be advised during the RA process what accessories should be included with the amplifier Power supplies connectors cords etc This is dependent on the failure assessment 3 When shipping your amplifier it is important that it has adequate protection We recommend you use the original packing material when returning the product for repair If you do not have the origi nal box see number 4 4 If you provide your own shipping pack the minimum recommend ed requirements for materials are as follows a 275 P S I burst test Double Wall carton that allows for 2 inch solid Styrofoam on all six sides of unit or 3 inches of plastic bubble wrap on all six sides of unit b Securely seal the package with an adequate carton sealing tape c Do not use light boxes or peanuts NOTE Damage caused by poor packaging will not be covered un der warranty 6 2 4 Estimate Approval An estimate for all non warranty repairs will be provided to the custom er once the unit has been shipped to the factory The customer is re sponsible to approve this estimate within 7 days If the repairs are not approved within 14 days Stewart Audio reserves the right to consider the unit s
7. equipment Using equipment that is not capable of handling the output wattage may lead to permanent damage NOTE Stewart Audio will not be held responsible for damage to your CVA Series amplifier or connected equip ment if the instructions in this manual are not followed NOTE For additional operating precautions please refer to Important Safety Instructions located on Page 2 3 2 Controls Indicators and Connectors STEWART CVA50 1 NET NETWORK NET LOC PRIORITY LOCALIN LINE OUT 1 4 5 1 Signal Priority Switch 7 Signal Present Indicator LED 2 Network Connector 3 Power Indicator LED Channel Level Knob Clip Indicator LEDs Input Connector 170 Power Connector 5 Line Out Speaker Out Connector 6 Remote Volume Control 14 CVA50 1 NET NETWORK LINE OUT 2 1 Network Connector Line Out 3 Signal Present Indicator LED STEWART SIG PWR 3 4 Power Indicator LED 5 Power Connector 6 Speaker Out Connector 15 3 2 1 Indicators CVA Series amplifiers have three rear panel LEDs to indicate the status of the amplifier The blue LED labeled ON will be lit when the unit is connected to a power source The green LED labeled SIG will light when an audio signal is present on the audio input When signal is present and output is going to the speakers the red LED labeled Clip will light when the input level signal is too high The LEVEL
8. 00 ft 20 AWG Over 1000ft 18 AWG Speaker leads connect by means of removable Euro Block connectors supplied with the unit Strip speaker leads 1 4 and insert leads into connector observing proper polarity With a small flat blade screwdriv er tighten the screw until the leads are held securely in place Inspect for possible shorts or broken wires 11 2 5 1 Constant Voltage The Euro Block connector on the rear of the amplifier is capable of sup plying output at either 100V or 70V depending on the step down trans formers which will be used in the speaker installation For information on specific step down transformer installation information please con sult the transformer s manufacturer s literature 2 5 2 Wiring Example The diagram below is a typical wiring setup for two speakers with out board step down transformers wired in parallel to the 70V output op tion of a CVA Series amplifier Output Connector 100V 70V 4 12 3 Operation 3 1 Operating Precautions 1 Before use your amplifier must be configured for proper opera tion including input and output wiring hookup Improper wiring can result in damage to equipment or potentially harm to the operator Consult section 2 for setup instructions 2 Tampering with the circuitry or making unauthorized changes is not only dangerous but may also violate local regulations 3 Use care when making connections between the amplifier and the input or output
9. STEWART The Difference is Hear EVASO 1 NET STEWARTAUDIO EVASO 1 NET Owner s Manual CVA50 1 NET Series July 2014 Important Safety Instructions Before using your Stewart Audio Inc Power Amplifier please read this Owner s Manual carefully to ensure optimum trouble free perfor mance WARNING TO REDUCE THE RISK OF ELECTRICAL SHOCK DO NOT EX POSE 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 CAUTION A A CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL The lighting bolt within arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of un insulated dangerous voltage within the product s enclosure that may be of sufficient mag nitude to constitute a risk of electrical shock to person The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instruction in the literature accompanying the appliance Important Safety Instruction Please Read Prior to Product Installation 1 Installation should be performed by a trained and licensed professional to insure safe and lasting operation All of the safety and operating instructi
10. crap and may discard it 6 2 5 Payment of Non Warranty Repairs Payment for non warranty repairs must be submitted to Stewart Audio before the product will be returned to the customer 24 7 Accessories The following accessories are available from Stewart Audio for your amplifier All part numbers shown are Stewart Audio Part Numbers Mounting Brackets AV POLE Pole mount bracket for AV Series amplifiers AV BRACKET Universal mounting bracket for AV Series amplifiers Connection Adapters ADPT RCA Mono Female RCA to male Euroblock ADPT SUMRCA Stereo Female RCA to male Euroblock ADPT SUM35 Stereo Female 3 5mm to male Euroblock Wall Plates WP RVC B Wallplate with 10k potentiometer and knob for re mote volume control Black WP RVC A Wallplate with 10k potentiometer and knob for re mote volume control Aluminum To purchase these accessories or to see the full Stewart Audio product lineup visit us at www stewartaudio com 25
11. e mixer or preamp level Replace the cables and loudspeakers temporarily to see if this resolves the problem If problem still exists contact your Authorized Dealer for ser vice 20 5 Technical Specifications Maximum Output 30Hz 20kHz CVA50 1 NET NET Frequency Response 0 3 dB Power Bandwidth 3dB THD N Signal to Noise Ratio Remote Volume Control Input Sensitivity Standard Voltage Gain Input Impedance Balance Unbalanced Power Consumption Idle 1 8 Draw Class Input Connectors Output Connectors Power Supply Cooling Controls LED Indicators Construction Plenum Rating Dimensions Height Width Depth Weight 50W 100V 70V 100HZz 20kHz 80Hz 30kHz lt 0 1 gt 80dB 0 10V DC 4 pin Block 0 5V 3 dBV 150X 43dB 70 7V 20k Ohms 10k Ohms 6 1 Watts 14 Watts D RJ45 Euro Block 3 pin 3 5mm NET Euro Block 2 pin 5mm External In Line 48DVC Convection Cooling Level Power Signal Clip Aluminum Chassis UL 2043 Approved 1 25in 3 2cm 6 00in 15 2cm 4 00in 10 2cm 1 2 Ibs 0 54kg Stewart Audio reserves the rate to change features and specifications without notice 21 6 Warranty Information 6 1 Warranty Summary All Stewart Audio amplifiers and accessories unless excluded in this summary are covered by a 3 year limited warranty on parts and labor from the data of purchase In order to be eligible for warranty repairs the amplifiers and accessories must have been
12. eceivers are shown on the left hand side The CVA50 1 NET series includes 1 trans mitter and 1 receive channels In order to make a connection click on the matrix node between the appropriate transmitter and receiver If a connection is successful it will display a green checkmark 3 3 2 Dante FAQ Q l am having problems installing or using the Dante Controller Soft ware A Please refer to the official documentation available in the Audinate portal where you downloaded the Controller Software Q do not see the CVA50 1 NET series showing up on the network A All Stewart Audio products are tagged as Ultimo lt MAC_ADDRESS gt from the factory You can find the correct Ultimo device by choosing the correct MAC address from the list You can rename this using the device configuration 18 3 4 Remote Volume Control NET Models Only CVA50 1 NET amplifiers can have their volume remotely controlled or muted via the Euro Block input on the rear of the amplifier The remote volume control allows the units volume to be controlled through the use of an external potentiometer which can be located wherever con venient for the user Remote muting is also useful for fire alarm situa tions in which all unnecessary sound must be silenced A NOTE If the remote volume control connector is utilized it will override the volume knob on the rear of the unit In order to remotely control the volume of the unit a 10k ohm potenti ometer sh
13. ifier 100V or 70 7V e Selectable priority switching NET only e Remote volume control NET only e Multiple mounting options e External inline power supply e Made in the USA 1 2 Using this Manual In order to obtain maximum performance from your CVA Series Ampli fier please take time to read this brief owner s manual and carefully follow the guidelines for connection and operation This manual provides you with the information necessary to safely in stall and operate your new CVA Series amplifier in the most common scenarios If you find yourself requiring additional assistance please feel free to contact your Authorized Dealer or you may contact us di rectly using the contact information provided on the back of this manu 5 2 Setup 2 1 Setup Precautions you have read the Important Safety Precautions at the be ginning of this manual CAUTION Before installing your amplifier make sure that 2 2 Amplifier Installation The CVA Series incorporates a number of different mounting options in order to fit your installation needs 2 2 1 Pole Mount Installation The CVA Series amplifier casing has mount holes on the top of the unit which can be used with the AV Pole bracket available from Stewart Audio Two screws are included in the kit which will affix the bracket to the top side of the unit Part Number AV Pole 2 2 2 1 Universal Mount Installation The CVA Series also has a universal brac
14. ket available which allows the unit to be mounted against a wall or under a table Two screws are included in the kit which will affix the bracket to the top of the unit Once this is done two holes are available for mounting the unit where desired Part Number AV Bracket CAUTION Use only the screws provided in mounting brackets to the amplifier Do not over tighten 2 2 3 Product Dimensions 6 00in 15 3cm STEWART 1 25in 3 2cm LVASO 1 NET Front s 4 00in_______ 10 2cm 1 25in 3 2cm Side 2 3 Proper Cooling Considerations Because CVA Series amplifiers are convection cooled with no fan the amplifiers must be given adequate space to allow for proper airflow Do not stack the amplifiers on top of each other or mount it in a way that other equipment will block airflow along the surfaces of the case CAUTION Inadequate airflow to the amplifier can cause the amplifier to overheat and potentially become damaged in the process Be sure to provide plenty of air space to allow for convection cooling 2 4 Input Connections NET Models Only Your CVA Series amplifier is provided with a 3 pin Euro Block connector for its input connection This connector will accept both balanced or unbalanced connections however some modifications must be made for an unbalanced connection See the next two sections for instruc tions on connecting your amplifier to its input source 2 4 1 Balanced Input Connections
15. nte seer tte tt ttre r treet 17 3 4 Remote Volume Control ceeecereertrt ttt ee esse te reeae es 19 4 Troubleshooting ccc eee eeeees 20 5 Technical Specifications 00 eee eee 21 6 Warranty Information eee tees 22 6 1 Warranty SUMMAary srsieeeeecreeee sete ttt e ee ee eter tte eeeeeeeeeees 22 6 2 Return Procedure eesseeeeeeseceereee settee tttetteee teeter ttt eeeeeeeenees 22 7 ACCESSOFIES eee ree eerie 25 This amplifier proudly designed and manufactured in the USA 1 Welcome sa es STEWARTAUDIO The Difference is Hear Congratulations on the purchase of your new Stewart Audio CVA Series power amplifier This amplifier has been designed and built to provide you with years of high quality audio performance and trouble free operation If after reading this manual you should have any questions concerning amplifier installation and opera tion please contact your Authorized Stewart Dealer or you may con tact us directly using the contact information provided on the back of this manual 1 1 Features Your Stewart Audio CVA Series amplifier is the result of years of expe rience in the design and manufacture of quality amplifiers As such it provides a combination of performance and operational benefits that simply cannot be found in conventional amplifiers e Sub Compact 1 3 rack package e Dante enabled for two channels of networked audio e Mono constant voltage ampl
16. ons should be read before the am plifier is installed or operated Retain these instructions for future refer ence All instructions should be followed all warnings on the amplifier and in the operating instructions should be adhered to 10 11 The amplifier should be situated so that its location and position does not interfere with its proper ventilation For example the amplifier must not be placed on a rug bed sofa or similar surface that impedes airflow across the chassis Airflow around the unit should be unobstructed This amplifier should not be used near water for example near a bathtub in a wet basement near a swimming pool etc This amplifier is intended to be operated in a controlled indoor environment Do not place the amplifier near heat sources such as radiators heat regis ters stoves or other appliances that produce heat The amplifier s power supply should only be connected to 120 VAC 60 Hz power source Do not defeat the ground or polarization of the power plug Route power cord and other cables so that they are not likely to be walked on tripped over or stressed Pay particular attention to condition of cords and cables at plugs and at the point where they exit the amplifi er To prevent risk of fire or injury damaged cords and cables should be replaced immediately Clean the amplifier with a clean damp cloth Do not use solvents or abra sive cleaners Never pour any liquid on the amplifier
17. ould be placed between the 10V pin and the GND Ground pin on the rear of the unit with its wiper on the RVC pin The volume will be determined by the selected resistance on the potentiometer the greater the resistance the louder the volume The amplifier can be remotely muted by making a connection between the GND pin and the MUTE pin No power should be applied to these pins simply a contact connection 10V 10kQ moO RVC GND MUTE 4 Troubleshooting Problem Power indicator does not turn on Procedure Check that the unit s power supply is plugged into a func tioning outlet and the power supply is correctly connected to the unit Problem No output heard on speakers Blue power indicator is lit Procedure Check that level controls are not turned down Check that input and output connections are secure Ensure signal present LED is lit to denote a signal If there is no signal detected check signal source and that level controls are set high enough Problem Amplifier overheats and or shuts off Procedure Review section 2 3 on proper cooling procedures Check the clip LED on the rear of the amplifier to see if the signal is overdriv ing the signal light flashes red frequently Overdriving the amplifier for extended periods of time can cause a thermal shutdown Problem Output sound is distorted or cracking Procedure Check all cables for damage or loose connections and re duce the gain on the input signal at th
18. purchased through an authorized Stewart Audio dealer and submitted by the original purchas er This warranty is only valid in the country in which the amplifier was purchased 6 1 1 Eligibility Requirements Stewart Audio warrants against all malfunctions which come as a result of component or manufacturer defect The amplifier is also covered from all failures which 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 e The power cord or AC plug has been damaged through misuse e The amplifier has been exposed to moisture or extreme tempera tures e The amplifier has been dropped items have been dropped on the amplifier or the enclosure has been damaged e The amplifier has been opened by the operator e The amplifier was improperly packaged when sending to the fac tory for repair resulting in damage e Any of the precautions or instructions found in this manual were not followed Damages resulting to the amplifier which are not covered under this warranty can be factory repaired at cost to the customer Use the con tact information below to initiate the repair process 6 2 Return Procedure This section includes the return procedures which must be followed in order to prevent processing delay or cost to the customer Please read the entire section before contacting Stewart Audio for returns 22 6 2 1 Return Authorization Number
19. ty switch to Local When a microphone signal is detected the normal network audio will be muted and the page will come through 16 3 3 Dante If you have selected the Dante version of the CVA50 1 NET series con figuration is done using the Dante Controller software from Audinate Dante Controller Software can be found on Audinate s website at www audinate com From there you can select Dante Controller under the Products section This will require registration for Audinate s portal and also includes ac cess to the Dante Controller User Manual which should be read for complete configuration instructions 3 3 1 Using Audinate s Dante Controller Software Once Dante Controller has been installed following the instructions in the Dante Controller Software User Manual found at www audinate com launch the application to see the connection matrix Danto Iramnittors Dante Recenrees ma wore G wm Conssi we one i rea om Ma we me Martor Conssi G osr reece marar mnm o Oste Vital Seemed Pienet a ao wma g Unlike CobraNet Dante does not require IP configuration or bundle configuration Instead connections are made on the connection matrix shown above 17 All Stewart Audio products will ship from the factory as being named Ultimo lt MAC gt This can be renamed within the device configuration in the Dante Controller Transmitters are shown on the top of the matrix while R
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