Stewart Audio CVA 25-1 Owner's Manual
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Stewart Audio CVA 25-1 Owner's Manual

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CVA Series
Owner's Manual
March 2014
www.stewartaudio.com
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Summary of Contents for Stewart Audio CVA 25-1

  • Page 1 CVA Series Owner’s Manual March 2014 www.stewartaudio.com...

  • Page 2: Important Safety Instructions

    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.
  • Page 3 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.

  • Page 4: Table Of Contents

    Table of Contents Important Safety Instructions ······························································ 2 Table of Contents ················································································ 4 1 Welcome ························································································· 5 1.1 Features ··············································································· 5 1.2 Using this Manual ································································ 5 2 Setup ······························································································· 6 2.1 Setup Precautions ······························································· 6 2.2 Amplifier Installation ···························································· 6 2.2.1 Pole-Mount Installation ···········································...

  • Page 5: Welcome

    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.

  • Page 6: Setup

    The CVA Series amplifier casing has mount holes on both the top as well as the side 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 or side of the unit.

  • Page 7: Universal-Mount Installation

    2.2.1 Universal-Mount Installation The CVA Series also has a universal bracket 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 or the side of the unit.

  • Page 8: Product Dimensions

    2.2.3 Product Dimensions 2.3 Proper Cooling Considerations Because CVA Series amplifiers regulates their temperature using con- vection cooling and no fans, 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.

  • Page 9: Input Connections

    2.4 Input Connections 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.

  • Page 10: Unbalanced Input Connections

    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.

  • Page 11: Output Connections

    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.

  • Page 12: Wiring Example

    2.5.1 Constant Voltage The Euro Block connector on the rear of the amplifier is capable of sup- plying output at either 70V or 100V 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.

  • Page 13: Operation

    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.

  • Page 14: Controls, Indicators, And Connectors

    3.2 Controls, Indicators, and Connectors CVA 25-1 PLENUM RATED LEVEL 100V 70V CLIP INPUT SPEAKER Clip Indicator LED Volume Level Knob Power Connector Input Connector Output Connector Remote Volume Control Power Indicator LED Signal Present Indicator LED...

  • Page 15: Indicators

    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 not in sleep mode. The green LED, labeled “SIG”, will light when an audio signal is present on the audio input.
  • Page 16 3.2.3 Remote Volume Control (cont.) In order to remotely control the volume of the unit, a 10k-ohm potenti- ometer should 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.

  • Page 17: Troubleshooting

    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. Ensure that there is an audio signal present on the audio input indicated by the green LED being lit.

  • Page 18: Technical Specifications

    Power, Signal, Clip Construction Aluminum Chassis Plenum Rating UL 2043 Approved Dimensions Height 1.25in (3.2cm) Width 4.35in (11.1cm) Depth 3.2in (8.1cm) Weight CVA-25/CVA-50 <0.7bs (0.32)/ 1.2 lbs (0.54kg) Stewart Audio reserves the rate to change features and specifications without notice.

  • Page 19: Warranty Information

    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.

  • Page 20: Return Authorization

    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.

  • Page 21: Estimate Approval

    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. Do not ship any accessories (manuals, cords, hardware, etc.) with your unit.

  • Page 22: Accessories

    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.
  • Page 23 8 Notes For Your Record In the spaces provided below, record the model and serial number located at the rear of your amplifier. Model No. ________________________________________ Serial No. _________________________________________ Purchase Date _____________________________________ Retain this information for future reference.
  • Page 24 14397 Cuesta Court Suite D1 Sonora, Ca. 95370 Phone: 209-588-8111 Fax: 209-588-8113 www.stewartaudio.com...

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