Trilogy 990 User manual

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User Manual

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thank you
Welcome
Firstly, thank you for purchasing your Trilogy Audio Systems 990 Power-amplier, we value your custom.
We strive to design and build world class products that stand the test of time. By reading this manual you can
gain clear understanding of its operation and learn to care for it correctly. In turn, it will reward you with a lifetime
of outstanding performance.
......................................
Nic Poulson.
CEO Trilogy Audio Systems.
www.trilogyaudio.com
User Manual
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5 Introduction
5 About this manual
7 Unpacking
7 Enviroment
7 Power Supply
9 Connections
11 Operation Guide
13 Keep Warm Mode
15 Bridge operation
17 Operational Warnings
19 Protective Lockout Modes
21 TASLink Overview
Appendices
23 Appendix A
25 Appendix B
Care & Service
27 Cleaning
27 Servicing
27 Declarations
Glossary
28 Glossary
Specications/Returns
29 990 Specications
29 Returns
Acknowledgements
30 Acknowledgements .
contents
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Introduction
We prefer that your Trilogy dealer delivers, installs, sets up and explains your 990’s operation to you.
However, we still recommend that you read through this manual thoroughly and keep it to hand for reference.
Should any part of this manual or the operation of the 990 not be clear to you, please do not hesitate to contact
your Trilogy dealer. If they are not available please contact ourselves directly.
About this manual
Throughout this user manual, the following icons are used:
[power] This refers to a physical control on the 990.
LEFT OUTPUT This refers to a physical connection on the 990.
From this point on, any information presented on the left hand pages are pictorial representations of either the
front or back views of the 990 or other diagrams. Therefore consider the left hand pages as additional information
to accompany the written descriptions on the opposite pages.
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Unpacking
Be careful when unpacking your Trilogy amplier, it is heavy. Seek assistance if necessary. Store the packaging
safely for future use. It is the ideal method of protecting your amplier from damage during transport.
Environment
Do not site the amplier near liquids, or place water-lled containers near the unit. If water does come into
contact with the unit there is serious potential for an electric shock or re hazard. Immediately pull out the mains
plug from the wall socket. Contact your dealer to arrange an inspection before further use.
The amplier is cooled by convection and so needs good circulation of room temperature air under and around it.
Do not place it near sources of heat such as radiators or in direct sunlight. Do not enclose in a cupboard. Do not
place directly on carpet.
A at, smooth surface is required. As with all high resolution audio equipment, your amplier is sensitive to
vibration, strong magnetic elds and radio interference. A dedicated high performance equipment platform sited
away from other appliances is the optimum location.
Power Supply
The AC input voltage has been set for the country it was purchased in. Check that the label on the rear panel
matches your AC supply voltage before plugging in. The AC inlet cable provided should be used. If another cable
is used check it is wired correctly. The fuse should be rated at 10 amps.
The wires in the AC input cable supplied are coloured in accordance with the following code:
Green and yellow..............Earth
Blue................................Neutral
Brown.................................Live
The amplier must be earthed. Do not disconnect the AC earth at any time. If in doubt about any aspect of
power supply, consult your Trilogy dealer or a qualied electrician.
A direct connection to a mains outlet is best for your amplier, avoid adapters. To realise your amplier's full
potential we recommend high quality mains conditioning. See www.Isol-8.co.uk for more on power supply and
system solutions from our highly acclaimed sister company.
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Connections
It is good practice to complete all interconnections before switching on to avoid any damage to your systems
loudspeakers while plugging in.
The IEC inlet provides the unit with power. Connect with the supplied AC input cable. It can be left connected at
all times to ensure reliable operation. If not being used for extended periods of time switch off at the mains outlet.
The amplier has two alternative line level audio inputs.
There is a single ended input on RCA “Phono” connectors or balanced input on Neutrik XLR connectors.
Connect your preamplier’s Main output to either of these as required. If your pre amplier offers a choice, it is
better to use the balanced connection.
Each channel has outputs via copper terminals for connection to your loudspeakers. It is important to connect
your speaker cables correctly. Connect the terminal marked + to the positive terminal of your loudspeaker, and
the terminal marked – to the negative. Make sure that each connection is secure and not touching another. Do
not over tighten the terminals as damage may result. Finger tight is sufcient torque.
Twin TASLink connectors allow system interconnection and control via QuietBuss with other Trilogy Audio System
products. This 990 can be remotely switched on and off and safe operation monitored via TASLink. Various other
operational facilities are also available. See your Trilogy Pre amplier manual for further details.
TASLink cables of varying lengths are available from your Trilogy dealer.
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TRILOGY

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Operation Guide
Having made and checked all appropriate input, output and AC connections, the [power indicator] will be dimly
lit. To turn on the 990 briey press the [power button].
The [power indicator] will ash slowly for 25 seconds, then ash more rapidly for a further 25 seconds. During this
“warm up” period, the output will be muted.
The (power indicator) will now remain on. The 990 is now ready for use.
Optimal performance will be achieved in about 1 hour once the amplier has become quite warm to the touch.
To turn the amplier off, press and hold the [power] button for half a second.
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Keep Warm Mode
The central uted heatsink is at the very core of the 990’s design. Firstly it forms a very rigid and inert structural
spine. Secondly, it separates the AC mains and power supply from audio electronics. Thirdly, normal nned
heatsinks resonate quite badly and this noticeably effects the performance of the output stage. The 990 does not
suffer from this. Finally, the heatsink is designed deliberately to be of high mass and low efciency. Both of these
work together to maintain the 990’s output stage at the optimal temperature, a temperature that does not vary
much whilst amplifying music. This temperature will vary slightly depending on the temperature of your room but
will typically be 45 degrees Centigrade. This will feel quite warm to the touch and is quite normal.
Once the 990 is on, you may enter “keep warm” mode by briey pressing the [power button].
The [power indicator] and heatsink utes illumination will now slowly and continually cycle between full intensity
to dim.
To bring the 990 back to operation, again briey press the [power button]. The start up sequence will happen in
the usual manner. From this keep warm mode, optimum performance will be achieved in a much shorter period
of time.
If the 990 is connected to a Trilogy Pre-amplier via TASLink, control over the keep warm mode can be made
from the Pre-amplier or the PRC (Personal Remote Control). See your Trilogy Pre amplier manual for further
details.
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standard
bridge

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Bridge operation
The 990, very unusually, is a true balanced amplier from input, right up to the output stage. In a normal amplier
(even if it has a balanced input), the output to the loudspeaker is connected between the amplier hot (or +)
terminal and system earth.
In a bridge amplier, the loudspeaker is connected between the output of two power ampliers.
Whilst this method is much more costly as four ampliers are required for stereo, the enormous currents that ow
to and from the loudspeaker, do not in any way inuence the very delicate system earth.
DO NOT in any circumstances allow either the + OR the – outputs of the 990 to be connected to earth or each
other. This may be the case with some kinds of loudspeaker switching matrix or some headphone adaptors.
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Over Current
DC Offset
Temperature Hot
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Operational Warnings
The [Power indicator] is not only used to indicate the operational status of the 990, but also provides a visual
indication of any possible overload or fault condition.
It should be stated that you should not experience any of these conditions in normal use.
Whilst the [Power indicator] is ashing during the warm up period, it is on and off for equal amounts of time.
However, when it is indicating a warning or fault condition, there will be a series of one tenth of a second “blinks”
or “ashes”, which indicate different conditions.
This page details the WARNINGS. These are arranged so that the [Power indicator] is mainly on and “blinks” off.
If the [Power indicator] is mainly off and “ashes” on, then the 990 has entered a Lockout mode. This is covered
on the next page.
The three warnings are detailed below:
Over Current
The 990 is being asked to supply too much current to the loudspeaker. The 990 will momentarily mute and
repeatedly continue to do so until the volume is lowered.
The [Power indicator] will “blink” off once in the 1.6 second period. Continued operation in this state will cause
the 990 to enter Over Current Lockout.
DC Offset
The output signal of the 990 has a DC component, or contains very low frequencies at high amplitude. The 990
will mute until this condition has ceased. Generally this condition will be caused by a brown out, or playing source
material with extremely low frequencies at relatively high levels.
The [Power indicator] will “blink” off twice in the 1.6 second period. Continued operation in this state will cause
the 990 to enter DC Offset lockout.
Temperature Hot
If the temperature of the 990’s heatsink reaches 60 degrees centigrade, the following warning will be given, but
the 990 will remain operational.
The [Power indicator] will “blink” off three times in the 1.6 second period and will continue until the 990 cools
below 55 degrees centigrade. If the temperature exceeds 65 degrees centigrade, then the 990 will enter
Over Temperature Lockout.
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Over Current Lockout
DC Offset Lockout
Over Temperature Lockout
Power Supply Lockout
Output Stage Lockout
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Protective Lockout Modes
As described on the previous page, if the warning condition continues for a period of time, the 990 will enter
Protective Lockout Mode. Once in this mode the 990 will turn off. This will be indicated by the [Power indicator]
being largely off with brief ashes on. Again the number of ashes will indicate the reason for the shutdown.
At this point it is important to record or remember the number of ashes. We call this mode a Lockout, because
you cannot simply turn the 990 back on from the [power button]. We thought this condition too important for a
simple reset. There may, for example, be a problem that needs correcting before re-powering the 990. Examples
are there is a short circuit in the loudspeaker cabling or the airow over the heatsink is obstructed.
If you are condent that you have found the cause of the lockout you can attempt to re-power the 990. You will
need to remove the IEC power inlet cable, wait for 10 seconds and then plug it back in again. Then follow normal
turn on procedure.
If however, the 990 re-enters lockout mode, (remember it may take some considerable time for the fault condition
to re-appear if, for example, it was a temperature lockout) it is important to consult your Trilogy dealer as there
may be an internal fault.
1 ash Over current lockout.
2 ashes DC Offset lockout.
3 ashes Over temperature lockout.
4 ashes Power supply lockout.
5 ashes Output stage lockout.
If the 990 is connected to a Trilogy Pre amplier via TASLink, then these conditions will also be indicated on the
Pre-amplier’s display.
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