--------------------------------------------------------------------------- SYMPHONY POWER AMPLIFIER OWNER’S MANUAL ------------------------------------------------------------------------------- © Viola Audio La boratories 2004, 2005 The information contained in the manual is subject to change without notice. The most current version of this manual will be posted on our web site at www.Viola labs.com.
TABLE OF CONTENTS • Safety Instructions 3 • Introduction 4 • Unpacking 4 • Voltage Setting 4 • Location 5 • XLR Connector Pin Assignment 5 • Speaker Cable Connection 6 o Cables and Connectors 6 o Single Speaker Cable Connection 6 o Bi-Wire Connection 7 o Bridge Connection 8 • Bi-amplification • AC Power Cable Connection 10 • Switching on for the First Time 10 • Breaking In 10 • Care and Cleaning 11 • Fuses 11 • Troubleshooting 12 • Warranty 13 • Servi
IMPORTANT SAFETY INSTRUCTIONS Please read all of the following instructions carefully before operating your power amplifier. 1. The VIOLA Symphony weighs approximately 120lbs (54kg). NEVE R try to move it on your own. Always use two people to move or unpack the unit. Take care to lift using your legs and avoid straining your back. 2. This product contains no user serviceable parts. NEVER attempt to repair the unit yourself. Refer all servicing to a VIOLA approved technician. 3.
to 55°C non-condensing. 12. ALWAYS disconnect the unit from the mains supply during lightning storms , or if the unit will not be used for a prolonged period. INTRODUCTION TRODUCTION Thank you for choosing the VIOLA Symphony Amplifier. Great care has gone into the design and manufacture of the Symphony and if properly used, it will give a lifetime of musical enjoyment.
personal injury and you may also cause serious damage to the unit which will void the warranty. LOCATION We recommend that you place the amplifier as close to the loudspeakers as possible, as this reduces the length of speaker cable required. Whilst this make it necessary to use longer interconnect cables, long interconnects cause less sonic degradation than long speaker cables. The unit may be placed on a stand or shelf, provided it is strong enough. Alternatively it may be placed directly onto the floor.
SPEAKER CABLE CONNECTION Caution! • NEVER connect a power amplifier's output terminals to any device other than a loudspeaker. • NEVER short-circuit the amplifier's output terminals. • ALWAYS switch the amplifie r off before connecting or disconnecting signal or speaker cables. CABLES AND CONNECTORS To realize the full potential of the Symphony, we recommend the use of a highquality speaker cable such as the VIOLA Jazz cable. Please consult your VIOLA dealer for details.
Speaker Symphony RED BLACK H L H L L H - + Figure 1. Single speaker cable connection. BI-WIRE CONNECTION Bi-wireable speakers have separate inputs for the high frequency (HF) and low frequency (LF) sections of their cross-overs and these are connected to the power amplifier with separate speaker cables. This form of connection is regarded as superior to single wiring, as it avoids interactions between the low and high frequencies that may occur when a single speaker cable is used.
Speaker Symphony RED BLACK H L H L L H - + - + Figure 2. Bi-wire connection. Note: Bi-wireable speakers are often shipped with links between the inputs to the two sections of the cross-over. Ensure that these links are removed, or the benefits of bi-wiring will not be realized. BRIDGE CONNECTION The two channels of the Symphony may be connected in what is called “Bridge Connection” to form a mono amplifier that can deliver approximately 4 times the output power of the individual channels.
Connect the bridging cable between the Fischer input connector on the right channel and the XLR input connector on the left channel. Connect right channel upper or lower red binding post on the rear of the Symphony (which ever is convenient) to the input terminal marked +, or colored red on the speaker. Connect left channel upper or lower red binding post on the rear of the Symphony (which ever is convenient) to the input terminal marked -, or colored black on the speaker.
AC POWER CABLE CONNECTION If the wall outlet you plan to use for the Symphony has an on/off switch, check that it is switched off. Insert the supplied AC mains cord into the receptacle on the rear of the Symphony and ensure that it is pushed securely home. Insert the other end of the mains cable securely into the mains outlet. Take care to arrange the cable so that it is not bent sharply and that its weight will not pull it out of either the mains outlet, or the receptacle on the rear of the Symphony.
CARE AND CLEANING Caution! • ALWAYS switch the amplifier off and disconnect it from the mains supply before attempting to clean it. • NEVER apply cleaning products directly to the amplifier as they may enter the unit and cause damage. • NEVER use any of the following cleaning products as they may damage the finish: • Wax polish • Spirit or alcohol based cleaners • Corrosive or abrasive cleaners In most cases wiping the unit with a slightly damp soft cloth will give satisfactory results.
TROUBLE SHOOTING Most problems may be resolved by following the steps below. If these fail, please contact your VIOLA dealer, national VIOLA distributor or VIOLA directly. 1. No sound and the front panel LED is not lit? • Press the front panel power switch to confirm that the unit is not switched off.
and stays on proceed to the next step. If it shuts down there is a fault with the signal source and you should contact the dealer or maker directly for assistance. • Switch the amplifier off and reconnect the other channel from the signal source. Switch the amplifier on. If it starts (front panel LED comes on) and stays on proceed to the next step. If it shuts down there is a fault with the signal source and you should contact the dealer or maker directly for assistance.
SERVICE Customers Within the USA In the first instance please contact your local VIOLA dealer. Should they be unable to assist you, please contact VIOLA by phone on 1-203-772-0435, by fax on 1-203772-0569, or by email at service@Viola labs.com. Please supply as much information about the problem as possible, including the unit’s serial number and details of all equipment in the system when the fault occurs.
SPECIFICATIONS Class of Output Operation: AB2 Power Rating: 200W continuous average power into 8 ohms 20Hz to 20kHz, both channels driven at less than 0.25% THD 400W continuous average power into 4 ohms 20Hz to 20kHz, both channels driven at less than 0.5% THD IM Distortion (SMPTE): 1W to 200W into 8 ohms <0.075% 1W to 400Winto 4 ohms <0.10% THD: <0.1% @ 20 kHz/200 watts Frequency Response: 1W into 8 ohms (10Hz - 20kHz) +/-0.
