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FORTE MONO POWER
AMPLIFIER
OWNER'S MANUAL
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© 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.
P/N: 91-fortemanual
Revision: 02
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Related Manuals for Viola Systems FORTE MONO
Summary of Contents for Viola Systems FORTE MONO
- Page 1 --------------------------------------------------------------------------- FORTE MONO 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.
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Page 2: Table Of Contents
TABLE OF CONTENTS • Safety Instructions • Introduction • Unpacking • Voltage Setting • Location • XLR Connector Pin Assignment • Speaker Cable Connection o Single Speaker Cable Connection o Bi-wiring Speaker Connection o Bridge Connection • Multi-amplification • AC Power Cable Connection •... -
Page 3: Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS Please read all of the following instructions before operating your power amplifier. This product contains no user serviceable parts. NEVER attempt to repair the unit yourself. Refer all servicing to a VIOLA approved technician. This product must be connected to the mains supply with a three- conductor AC mains power cord that includes a ground connection. -
Page 4: Introduction
INTRODUCTION Thank you for choosing the VIOLA Forte Amplifier. Great care has gone into the design and manufacture of the Forte and if properly used, it will give a lifetime of musical enjoyment. We strongly recommend that you read these instructions before you attempt to use the unit, so that you can be sure it is set up to give optimum performance. -
Page 5: Location
LOCATION We recommend that you place the Forte as close to the loudspeaker as possible, as this reduces the length of speaker cable required. Whilst this may make it necessary to use longer interconnect cables, long interconnects cause less sonic degradation than long speaker cables. -
Page 6: Speaker Cable Connection
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 Forte, we recommend the use of a high-quality speaker cable such as the VIOLA Jazz cable. -
Page 7: Bi-Wiring Speaker Connection
BI-WIRE CONNECTION Bi-wireable speakers have separate inputs for the high frequency (HF) and low frequency (LF) sections of their cross-overs. These are connected to the power amplifier with separate speaker cables. Bi-wire connection is regarded as superior to using a single cable, as it avoids interactions between the low and high frequencies that may occur when a single speaker cable is used. - Page 8 that can deliver 75W per channel into 8 ohms, into a mono power amplifier that can deliver 300W into 8 ohms. This works by feeding the input signal into one unit whilst feeding an anti-phase version of the same signal to the input of the other unit. The speaker is connected between the High (H) terminals of the two units.
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Page 9: Multi-Amplification
MULTI-AMPLIFICATION Multi-amplification (or multi-amping) uses separate p ower amplifiers to drive the input to each section of the speaker. This reduces the interaction not only between the upper and lower frequencies, but also between the left and right channels. There are two types of multi-amped system. The most common type uses the speaker’s internal cross-over. -
Page 10: Breaking In
Allow the system to stabilize for 2 minutes, and then put a CD into the player and press play. If the wall outlet you are using for the Forte is switchable, switch it on now. Press the power switch on the Forte’s front panel. When the unit starts, this will glow green. -
Page 11: Mains Fuse
MAINS FUSE The mains fuse is located inside the mains input receptacle on the unit’s rear panel. If you suspect that the fuse has blown, follow the procedure below: • Disconnect the amplifier from the mains supply. • Insert a small screwdriver into the recess in the fuse cover as shown in the diagram below and carefully lever the cover up. -
Page 12: Troubleshooting
TROUBLE SHOOTING Most problems may be resolved by following the steps below. If these fail, please contact your VIOLA dealer, national distributor or VIOLA directly. 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. -
Page 13: Warranty
If the unit starts, but then shuts down contact your VIOLA dealer, national distributor or VIOLA for assistance. • Switch the amplifier off and reconnect the signal source. Switch the amplifier on. If it starts (front panel LED comes on) and stays on proceed to the next step. -
Page 14: Contacting Viola
For units returned to the factory under warranty during the first year, VIOLA will pay for the freight charges both ways. A VIOLA approved shipping company must be used and the units will be returned to the customer using the same carrier, or an equivalent service. -
Page 15: Specifications
SPECIFICATIONS Class of Output Operation: AB Power Rating: 75W continuous average power into 8 ohms 20Hz to 20kHz at less than 0.25% THD 150W continuous average power into 4 ohms 20Hz to 20kHz at less than 0.5% THD IM Distortion (SMPTE): 1W to 75W into 8 ohms <0.075% 1W to 150Winto 4 ohms...
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