Trilogy 931 Manuale utente
USER MANUAL
931
USER MANUAL 931.21102014.V1
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thank you
Welcome
Firstly, thank you for purchasing your Trilogy Audio Systems 931 Headphone
Amplier, 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
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GETTING STARTED
4 Introduction
4 Unpacking
4 Environment
5 Power Supply
5 Warning!
6 Listening with Headphones
8 Connections
10 Operation
CARE & SERVICE
11 Cleaning
11 Servicing
11 Declarations
contents
GLOSSARY & SPECIFICATIONS
12 Glossary
12 Specications
RETURNS & ACKNOWLEDGEMENTS
13 Returns
13 Disposal & Recycling
13 Acknowledgements
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Introduction
We prefer that your Trilogy dealer explains your 931’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 931 not be clear to you, please do not hesitate to
contact your Trilogy dealer. If they are not available please contact ourselves directly.
Unpacking
Be careful when unpacking your Trilogy headphone amplier. Store the packaging safely for future use. It
is the ideal method of protecting your amplier from damage during transport.
Environment
Do not site the headphone amplier 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 931 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 amplier 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.
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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 and fused appropriately.
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 amplier 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 qualied electrician.
A direct connection to a mains outlet is best for your amplier, avoid adapters. To realise your amplier'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.
Warning!
The 931 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 qualied electrician.
The IEC inlet carries a ceramic 20mm fuse. If the unit stops working, check and replace this fuse with
one of the same type and value if necessary: 250mA T for 230V version, 500mA T for 100V and 120V
versions. If the fuse repeatedly fails, do not use the unit and contact your Trilogy dealer for service.
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Listening with Headphones
IMPORTANT!
The 931 is capable of delivering high sound pressure levels. Listening at high sound pressure levels
may result in permanent hearing damage. The following table is intended as an approximate guide to
recommended exposure levels.
Example Source Sound Level Max Exposure
Train Passing 10m 90 dbA 8 hrs
Circular saw 1m 95 dbA 4 hrs
Motorcycle pass 1m 100 dbA 2 hrs
Chain Saw 1m 105 dbA 1 hr
Rock Concert 10m 110 dbA 0.5 hr
Police siren 10m 115 dbA 0.25 hr or less
Hearing damage is a complicated issue. Users are urged to familiarise themselves thoroughly with current
government recommendations if regularly listening. Listening using high performance headphones with
low distortion can be subjectively misleading. The user may not be aware that high levels are being
reached. Trilogy recommends caution when setting listening levels.
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Trilogy 931 | Rear View
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Connections
It is good practice to complete all interconnections before switching on to avoid any damage to your
headphones 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 amplier has two single ended inputs on RCA “Phono” connectors.
The output is via a standard 6.35mm (¼”) type A jack socket. Most dynamic headphones are suitable
for connection; if you are in doubt about the suitability of your headphones seek advice from your Trilogy
dealer.
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Trilogy 931 | Front View
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Operation
Check all appropriate input, output and AC connections. Check that the volume control is set to a
moderate level. To turn on the 931 push the power toggle switch down. The power indicator will light red.
The 931 is now ready for use.
Optimal performance will be achieved in about 20 minutes once the headphone amplier has become
quite warm to the touch. The high mass heatsink for the output devices is at the heart of the 931’s
design. Normal extruded nned heatsinks resonate quite badly, this has a negative effect on the
small signal performance of the output stage. The 931’s heatsink is machined from a solid billet and
deliberately designed to be of high mass and low efciency. This maintains the 931’s output stage at the
optimal operating temperature whilst amplifying music. This temperature of the heatsink 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.
Inputs are selected by the toggle switch on the front panel. Input 1 is selected when the switch is up, Input
2 when the switch is down.
Volume is controlled by the rotary knob on the front panel.
To turn the amplier off push the power toggle switch up.
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