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To our valued customer and music enthusiast,
with the purchase of your new ACCUSTIC ARTS
incorporates the most modern technology to achieve excellent sound and quality. To make sure that you have
pleasure for as long as possible with your amplifier we kindly ask you to thoroughly read this instruction manual
through to the end.
We wish you many enjoyable hours of listening to music with your new unit.
®
ACCUSTIC ARTS
/ Lauffen (Germany)
C o n t e n t
1 MONO III – MK 2 highlights ____ Page 2
2 Important safety instructions ____ Page 3
3 Introduction and positioning ____ Page 4
4 Installation ____ Page 5
4. 1 Input selection: balanced / unbalanced
4. 2 Damping factor linearization
4. 2. 1
General information
4. 2. 2
The technical part
4. 2. 3
Claims and reality
4. 2. 4
Solution: damping factor linearization
4. 3 Mute function
4. 4 Loudspeaker cables and correct phase for the loudspeakers
4. 5 Connection to mains power
4. 6 Replacing damaged mains fuses
5 Start-up ____ Page 10
5. 1 Description of function
5. 2 Operating instructions
6 Looking after your amplifier ____ Page 11
7 Troubleshooting ____ Page 11
8 Specifications ____ Page 12
9 Copyright, trademarks, warranty ____ Page 13
1 MONO III – MK 2 highlights
▪
Extremely powerful mono power amplifier
▪
20 selected MOS-FET output transistors in premium quality
▪
Magnetically shielded and encapsulated toroidal core transformer
▪
Optimum smoothing thanks to more than 110,000 µF power supply capacity; Premium quality capacitors
▪
Very high damping factor for perfect speaker control
▪
ACCUSTIC ARTS® damping factor linearization (switchable)
▪
Professional protective circuit against clipping, HF oscillations and too high DC offset
▪
Switch-on current limitation for highest operational safety
▪
Constant low operating temperature due to generously dimensioned heat sinks
▪
Balanced input (XLR) and unbalanced input (RCA) – inputs are switchable
▪
Very high quality WBT speaker terminals (bi-wiring / bi-amping)
®
MONO III – MK 2 you have opted for a product which
2
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Summary of Contents for Accustic Arts MONO III MK2
- Page 1 To our valued customer and music enthusiast, ® with the purchase of your new ACCUSTIC ARTS MONO III – MK 2 you have opted for a product which incorporates the most modern technology to achieve excellent sound and quality. To make sure that you have pleasure for as long as possible with your amplifier we kindly ask you to thoroughly read this instruction manual through to the end.
- Page 2 ▪ Extremely stable housing, fully made of aluminium; inlay made of massive brass, polished and chromed ▪ ® ACCUSTIC ARTS MONO III – MK 2 is “Handmade in Germany” 2 Important safety instructions ▪ Read these instructions. ▪ Keep these instructions.
- Page 3 ▪ WARNING – DANGER TO LIFE! High voltage in the inside of the unit. Never operate the unit with removed top cover and do never touch the board while the unit is switched on! The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to presence of uninsulated “dangerous voltage”...
- Page 4 Carefully store the transportation packaging for the possibility of further use. If you have a claim on the warranty, always use the original packaging for any necessary transportation. Transportation without this packaging can lead to damage to the housing. Please check, if the following items are included: 1 x AC mains cable (type depends on your country) 2 x replacement fuses for FUSE 1 / FUSE 2 (type depends on your mains voltage) Provided there is available space the power amplifier should, if possible be positioned as close as possible to the...
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Page 5: Installation
4 Installation Fig. 1: Rear panel Mains socket FUSE 1: Fuse socket for protection of transformer 1 / right channel FUSE 2: Fuse socket for protection of transformer 2 / left channel INPUT SELECTION: see Fig. 2 in chapter 4. 1 AUDIO INPUT BALANCED: Balanced XLR input socket for the preamplifier output signal AUDIO INPUT UNBAL.: Unbalanced RCA input socket for the preamplifier output signal SPEAKERS RIGHT: Right loudspeaker output socket pair A... - Page 6 ® In order to connect this amplifier with a separate preamplifier, e.g. the TUBE PREAMP II from ACCUSTIC ARTS please use interconnect cables with best possible shielding and high quality connectors. This is the only way to ensure that the sound quality of the power amplifier is fully exploited.
- Page 7 Example: A power amplifier has (at 1 kHz) the internal resistance R =16 mΩ The damping factor is then calculated to be 500. Physical equation: 8 Ω / 0.016 Ω = 500 *** This is a typical value for modern transistor power amplifiers. (In comparison: at 1 kHz full tube power amplifiers usually have an internal resistance in the range of 0.4 Ω...
- Page 8 Fig. 5: This simplified diagram serves to illustrate damping factor linearization 4. 3 Mute function Fig. 6: Positions of the MUTE switch When the switch MUTE is pressed, the speaker outputs of the unit are turned off. The blue LED is still illuminated, but the speakers get no signal. Releasing the switch MUTE activates the speaker outputs.
- Page 9 IMPORTANT! Avoid short circuits! Never connect the output terminals of your power amplifier to each other. Neither connect red (+) with white or black (-) of the channel nor the channels to each other. 4. 5 Connection to mains power Only connect the power amplifier to the mains power when all the other cable connections have already been carried out.
- Page 10 5 Start-up Fig. 7: Front view LED (red) indicates protection mode during warm-up or error on the left output stage channel LED (red) indicates protection mode during warm-up or error on the right output stage channel LED (blue) indicates ready for operation Mains power switch to switch on the AMP III –...
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Page 11: Troubleshooting
6 Looking after your amplifier ® This unit from ACCUSTIC ARTS does not require special treatment in excess of the usual care taken with high quality devices. Clean the housing with a dry or slightly moistened cloth. Please do not use any aggressive detergents or detergents which contain silicon. - Page 12 This instruction manual was correct at the time of going to press. The manufacturer reserves the right to make changes to the technical specification without prior notice as deemed necessary to uphold the ongoing process of technical development. This manual is done by ACCUSTIC ARTS Audio GmbH. Copyright © 2016. All rights reserved. Trademarks: ®...
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Page 13: Warranty
Warranty: The manufacturer accepts no responsibility for damage caused by not adhering to this instruction manual. Modification or change to any part of the product by unauthorized persons releases the manufacturer from any liability over and above the lawful rights of the customer. If a warranty claim occurs, first contact your dealer.