Adam GTC 55 Manual de usuario
GTC 55
GTC 77
GTC 88
GTC Sub
Operation Manual / Bedienungsanleitung
English / deutsch
Grand Theatre Components
2
Please read the following safety instructions before setting up your system.
Keep the instructions for subsequent reference. Please heed the warnings and
follow the instructions.
Caution: To reduce the risk of electric shock, do not open the GTC Sub.
There are no user-serviceable parts inside. Refer servicing to qualified
service personnel.
The GTC Subwoofer, as well as all attached extension cords, must be termi-
nated with an earth ground three-conductor AC mains power cord like the one
supplied with the product. To prevent shock hazard, all three components must
always be used.
Check if the specified voltage matches the voltage of the power supply you use.
If this is not the case do not connect the GTC Sub to a power source! Please
contact your local dealer or national distributor.
The GTC Subwoofer should be installed near the socket outlet and
disconnection of the device should be easily accessible.
To completely disconnect from AC mains, disconnect the power supply from the
AC receptacle.
Protect the cord from being walked on or pinched.
Never replace any fuse with a value or type other than those specified. Never
bypass any fuse.
Always switch off your entire system before connecting or disconnecting any
cables, or when cleaning any components.
Caution
Risk of electrical shock
Do not open
Risque de shock electrique
Ne pas ouvrier
CAUTION: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT REMOVE BACK COVER OR ANY OTHER PART.
NO USER-SERVICABLE PARTS INSIDE.
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
REFER SERVICING TO QUALIFIED PERSONNEL.
Safety Instructions
3
GTC Manual / english
Always unplug sensitive electronic equipment during lightning storms.
Always keep electrical equipment out of the reach of children.
Do not place a loudspeaker on an unstable cart, stand or tripod, bracket or
table. The unit may fall, causing serious injury and/or serious damage. When
cart is used, use caution when moving the cart/apparatus combination.
Always use fully checked cables. Defective cables can harm your speakers. They
are a common source for any kind of noise, hum, crackling etc.
Do not expose these products to rain or moisture, never wet the inside with any
liquid and never pour or spill liquids directly onto a loudspeaker. Please do not
put any objects filled with liquids (e.g. vases, etc.) onto a speaker/subwoofer.
Avoid touching the speaker membranes and do not block the woofer’s
ventilation ports.
Never expose the loudspeakers to extremely high or low temperatures. Never
operate these products in an explosive atmosphere. Never use flammable or
combustible chemicals for cleaning audio components.
High SPL’s may damage your hearing! Please do not get close to the
loudspeakers when using them at high volumes.
Please note that the diaphragms build up a magnetic field. Do not ply with
magnetic items at close range to the diaphragms.
Assure free airflow behind the speakers to maintain sufficient cooling.
The cut out for an in-wall speaker installation could damage the support
structure or fire protection elements of a building. Contact an architect, the
constructor or an official authority for structural fire protection.
Damaging existing in-wall installations may cause severe injury or death. ␣
Before producing the wall cut-out, make sure that no conflict with other in-wall
installations will occur (pipe work, power cabling, etc.). Use a stud finder to
map the wall construction accurately, a pipe detector to scan the proposed
installation position and an electrical field detector to help avoid any risk of
electrical damage or shock. We recommend asking for professional help.
Safety Instructions
4
Table of contents
Safety Instructions ................................................ 2-3
1. Introduction .......................................................... 5
2. Quick Start ............................................................ 6
2.1 Important Information ........................................... 6
2.2 Connecting the speakers ...................................... 6
3. Recommendations on Setup ................................. 7
3.1 Room acoustics ..................................................... 7
3.2 General recommendations .................................... 7
4. Speaker Positioning .............................................. 8-9
4.1 The stereo triangle ................................................ 8
4.2 Surround placement ............................................. 8
4.3 Horizontal setup of the GTC 77 + GTC 88 ............. 8
4.3 Horizontal setup GTC 77 + GTC 88 (continued) ..... 9
4.4 Horizontal setup of the GTC 55 ............................. 9
5. Connecting the Subwoofer .................................... 10
5.1 Connections .......................................................... 10
5.2 Input ..................................................................... 10
5.3 Satellite Out .......................................................... 10
5.4 Sub Out ................................................................. 10
6. Subwoofer Placement ........................................... 11
6.1 Distance to satellites ............................................. 11
6.2 Walls/Distance to walls ........................................ 11
6.3 Finding the optimum position ............................... 11
7. GTC Sub Controls .................................................. 12-13
7.1 Mode ..................................................................... 12
7.2 Subwoofer Phase .................................................. 12
7.3 Satellite Filter ........................................................ 13
7.4 Sub Level .............................................................. 13
7.5 Sub Filter............................................................... 13
8. In-wall Installation ................................................. 14
9. Troubleshooting .................................................... 15
9.1 Distorted or no signal ............................................ 15
9.2 GTC Sub: No or distorted signal ............................ 15
9.3 GTC Sub: Parasitic noises ..................................... 15
10. Maintenance ......................................................... 16
11 . Shipping / Packaging ............................................ 16
12. Environmental Information .................................... 16
13. EU Declaration of Conformity ................................ 17
14. Limited Warranty ................................................... 18
14.1 Terms and Conditions ........................................... 18
14.2 How to claim ......................................................... 18
15. Technical Data ....................................................... 19
5
GTC Manual / english
1. Introduction
Dear customer,
Thank you for choosing the ADAM Audio GTC series.
ADAM loudspeakers are built for maximum quality reproduction and audio perfection.
The Home Theatre/Installation speakers of the GTC series combine the ability of
producing high sound pressure levels with the ADAM-typical, low distortion, crystal
clear sound. All components of this series can be combined individually with each
other.
The intention of this manual is to provide you with information about your new ADAMs.
It contains important information regarding safety, setting up, handling, and
warranty. We request that you read these sections carefully to ensure easy set up and
prevent potential problems.
If you have any questions about this or any of our products, please don’t hesitate to
contact us – we will be happy to assist you.
For detailed information concerning ADAM’s technologies and products, complete
reviews, and a list of worldwide ADAM users and studios, please visit our website:
www.adam-audio.com
You are invited to share your experience with our products by joining us on Facebook
and also, if you don’t want to miss out on the latest info on ADAM Professional Audio,
come and follow us on Twitter!
We hope that you enjoy your new loudspeakers and wish you many delightful hours
with them.
The ADAM Audio Team
6
2.1 Important Information for setup
After having unpacked your loudspeakers, please allow the system to acclimate
to the temperature of the room for approximately an hour.
We recommend using high quality cables to guarantee optimal performance.
We recommend that you retain the original packaging, as it is the best way to
guarantee safe transportation should the need to do so arise.
The loudspeakers will take some break-in time to achieve optimum sonic
performance.
2.2 Connecting the loudspeakers
a) Before connecting the loudspeakers to your audio components make sure that
the audio source is switched off and set the level controls fully counterclockwise.
b) Connect the speaker terminal with your audio
source (i.e. stereo/multichannel amplifier,
A/V receiver etc.) by using speaker wires with
stripped bare ends or banana plugs.
c) Make sure that the line out level (volume) of your stereo is either at a low level or
all the way off. Then switch on your audio system.
d) Turn on your source of music and adjust the volume carefully.
2. Quick Start
7
GTC Manual / english
The proper positioning of your loudspeakers is of extreme importance to the sound
quality. We would therefore like to give you some advice concerning room acoustics
and the setting up of your loudspeakers. Since every room is unique, we can only offer
general recommendations.
3.1 Room acoustics
Room acoustics come down to essentially three aspects:
a) Reverberation: The ‘sound’ of a room is to some extend a result of its reverbera-
tion, i.e. to how the sound waves are reflected. Soft furniture (like carpets, cur-
tains, or sofas) tends to absorb sound waves, especially higher frequencies. Hard
materials like stone or glass reflect sound waves almost entirely. In general, rever-
berant rooms are rather unforgiving in terms of authentic music reproduction due
to the great number of reflections.
b) The room dimensions: The volume of a room is the second important aspect of its
acoustics. The same loudspeaker will sound different in different sized rooms with
similar sonic characteristics. Therefore, the size of your room partly determines
the positioning of your loudspeakers.
c) The listening distance: The distance between the listener and the sound source
is the third crucial aspect in loudspeaker positioning. If this distance is either too
great or too small, the sound will be compromised.
3.2 General recommendations
Please make sure that there are no obstacles in the way from the loudspeaker to
your ears. You should be able to see the speakers completely.
The distance to the surrounding walls should be at least 40 cm to avoid early
reflections, which will degrade the sound.
The loudspeakers should be aligned with the listener’s position.
Please note that vibrating parts of nearby objects can mask the sound.
3. Recommendations on setup
8
4.1 The Stereo Triangle
If the loudspeaker is going to be used for stereo
applications, the optimum listening position should be at
the top of an imaginary equilateral triangle with the two
loudspeakers should be placed at the other two points
of this triangle. The loudspeakers should be aligned with
the listener’s position.
4.2 Surround Placement
Speaker positioning for multi-channel stereo purposes is ideally based on a circle
with speakers placed at 0° (Center), 30° (Front Right), 110° (Rear Right), 250°
(Rear Left), 330° (Front Left), with the listener being the circle’s center (Radius
between 0.7-2.0 m). This ITU recommended configuration may vary for music or
film applications. However, it is recommended to create a symmetrical listening
position with the front side and surround speaker pointing to the listener’s ear.
The distance to the surrounding walls should be at least 40 cm to avoid early
reflections, which can degrade the sound.
4.3 Horizontal setup of the GTC 77 + GTC 88
For a horizontal setup one of the subwoofer
segments and the tweeter-/midrange segment of
the GTC 77 + GTC 88 are interchangeable. In this
way you can place the tweeter-/midrange
segment between the two subwoofers and also be able to rotate it through 90°,
allowing the easy and efficient adjustment of the tweeter according to the position
of the audience.
a) Put the loudspeaker rear side down on a soft surface and
unscrew the subwoofer segment (middle segment) and the
tweeter-/midrange segment. Lift the middle segment out of
the speaker housing, remove the foam mat from the bottom
of the chamber and unplug the underlieing cable connectors.
b) Lead the subwoofer cable from the middle chamber into the
upper chamber, then lift the tweeter-/midrange segment out
of the upper chamber.
4. Speaker Positioning
9
GTC Manual / english
c) Place the tweeter-/midrange segment above the middle
chamber and twist it through 90°, so that the tweeter points
upwards in horizontal loudspeaker position. Plug in the cable
and place the segment onto the speaker housing with the screw
holes corresponding to the holes on the segment plate.
d) Connect the subwoofer with the cable in the upper chamber
and place the segment onto the speaker cabinet the same way
as you did with the tweeter-/midrange segment.
e) Screw both segment plates onto the speaker cabinet firmly.
f) If you choose to use two GTC 77 or two GTC 88 speakers as a
stereo pair in a horizontal position as indicated below, please
make sure that the set up is mirrored/symmetrical, i.e. that the
bass reflex ports of both loudspeakers face either inwards or
outwards in order to get a precise stereo image. This means you
have to turn the tweeter-/midrange segment above the middle
chamber for the right speaker through 90° in the opposite
direction than you did with the left one. Your horizontal stereo
setup should look:
4.4 Horizontal setup of the GTC 55
If you choose to use two GTC55 speakers as a stereo pair in a horizontal position
please make sure that the set up is mirrored/symmetrical, i.e. that the bass reflex
ports of both loudspeakers face either
inwards or outwards. This is crucial
for a precise stereo signal. Your
horizontal stereo setup should look:
4. Speaker Positioning
like this
or like that
like this
or like that
10
5.1 Connections
On the rear side of the subwoofer you can find balanced (XLR) and unbalanced (RCA)
connectors.
a) Before connecting the subwoofer to your audio components and the power source make
sure that the subwoofer, the loudspeakers and your audio source are switched off and set
the level controls fully counterclockwise.
b) Choose your preferred connection as described under 5.2.
c) Check if the specified voltage matches the voltage of the power supply you use. If this
is not the case do not connect the subwoofer to a power source! Please contact your
local dealer or national distributor. If the voltages match, use the included power cable to
connect the GTC Sub to the AC socket.
d) Switch on the main on/off switch on the rear panel of the subwoofer.
e) Make sure that the line out level (volume) of your stereo is either at a low level or all the
way off. Then, switch on your audio system and adjust the volume carefully.
5.2 Input
Connect the left and right line-level signal from your signal source
(preamplifier etc.) to the LEFT and RIGHT INPUT jacks. Use either
XLR (balanced) or RCA (unbalanced) cables.
5.3 Satellite Out
Connect the LEFT and RIGHT SATELLITE OUT jacks to the inputs of
the left and right main powered speakers or the inputs of the amps
powering the main speakers.
5.4 Sub Out
This balanced output mirrors the input signal enabling you to daisy-
chain as many GTC Subs in a row as you like. The Sub Level affects the
output, so that all Subs in the chain can be levelled at a time. Instead
of having one huge subwoofer it often is advisable to incorporate a
few smaller ones in the setup to avoid standing waves at very low
frequencies. This always needs a little bit of testing, since it is not
possible to predict the behaviour of a subwoofer in unknown acoustical
conditions.
5. Connecting the GTC Subwoofer
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