X-Treme Audio XTDT User Manual
XTDT AMPLIFIERS
XTDT AMPLIFIERS
DIGITAL TECHNOLOGY
AMPLIFIERS
Owner’s manual
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Owner’s manual
DIGITAL TECHNOLOGY SERIES AMPLIFIERS
Owner’s Manual
CONTENTS
1. Important safety instructions
2. Declaration of compliance
2.1 User’s liability
3. Introduction
3.1 Unpacking
3.2 Installation/Assembly
3.3 Front panel
3.4 Rear panel
4. Brief description of the product range
5. User instructions
5.1 Maximum power consumption
5.2 Cooling
5.3 Settings
6. Ouput stage block diagram
7. Protection features
7.1 Limiter
7.2 Thermal protection
7.3 Power safety check
7.4 DC protection
7.5. Absorption limitation
7.6 Power supply protection
7.7 Switch-on/Turn-off transients
7.8 Maintenance information
8. Technical features
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XTDT AMPLIFIERS
1. Important safety instructions
This symbol indicates the presence of important user instructions
and information that should be given particular attention so as to
use the product properly.
This symbol indicates the presence of “dangerous voltage” that
may cause the risk of electric shock. Pay the utmost attention and
proceed cautiously.
Please, read carefully the following - not thorough -advice for a
correct and safe use of Digital Technology Series amplifiers.
1. Follow carefully the attached documentation and keep it for
future reference.
2. Comply with the warnings.
3. Store the packaging and check that all material is in excellent
conditions.
4. Do not use water near the product, do not pour water or any
other liquid on the amplifiers. Do not use it with wet hands or
feet into the water.
5. Do not use next to heat sources such as radiators, stoves or
other similar devices.
6. Check the integrity of the mains cable. Do not tread on the
cable and do not squeeze the plug.
7. Connect the plug to a socket equipped with grounding. Do not
tamper with the plug. If the plug supplied is not compatible with
your socket, please apply to an electrician for its replacement.
8. Connect to supply mains with the same voltage as indicated
on the back of the amplifier.
9. Install the amplifiers in compliance with the instructions.
10. Do not obstruct the air ducts.
11. Disconnect the appliance in case of storm and if unused.
12. Connect according to the instructions only.
13. Do not connect an input signal higher than that indicated in the
manual.
14. Do not connect the amplifier output to the input of another
channel.
15. Do not connect any output of the amplifier to power sources
such as battery, voltage supply or outlet, regardless of wheth-
er the amplifier is on or off.
16. Keep the volume controls to a minimum during the amplifier
switching on/off.
17. Do not remove the upper or lower cover: there is a risk of elec-
tric shock.
18. Do not try to self-repair the appliance, but apply to qualified
personnel.
19. Clean with a dry cloth only.
20. The product should be handled by skilled personnel in the fol-
lowing cases:
- damaged mains cable or plug;
- exposure of the product to rain or humidity;
- some liquid has entered inside the unit;
- an object has fallen on the unit;
- the unit has fallen down and is damaged;
- the product does not work correctly or shows a remark-
able change of performance.
21. Careful supervision is necessary if the product is used in the
presence of children or inexpert adults.
22. This product could produce sound levels which cause hear-
ing damage. Use the utmost care and do not operate at high
volume level or at an uncomfortable level for a long time.
Consult an audiometric specialist in case of hearing loss or
complaints.
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Owner’s manual
2. Declaration of compliance
This device complies with the requirements of the EMC directive
89/336/EEC, amended by 92/31/EEC and 93/68/EEC, and the requirements of the Low Voltage Directive 73/23/EEC, amended by
93/68/EEC.
Standards Applied:
EN55103-1 (Emissions)
EN55103-2 (Immunity)
EN60065, Class I (Safety)
2.1 User’s liability
• Damages to the loudspeaker systems
Always check the peak and continuous power of the loudspeakers. This amplifier is extremely powerful and can be potentially
dangerous both to the loudspeakers and to persons. Most loudspeakers may be easily damaged or broken, especially by amplifiers operating in bridge. Even if there is a gain reduction through
the attenuators on the amplifier’s front panel, it is still possible to
reach the maximum output power if the input signal level is high
enough.
• Dangerous output voltage
The amplifier can generate hazardous output voltage. Do not
touch exposed cables of loudspeakers with the amplifier in operation.
3. Introduction
Congratulations for choosing X-Treme Digital Technology
Series amplifiers and thank you for trusting us and our products.
All the X-Treme amplifiers have been carefully planned in the smallest details, from every part of its equipment to final assembling.
The R&D dpt. underlines that the product you have chosen uses
the most advanced technology. An improper use of the amplifier
can compromise its correct operation. Therefore we recommend
you using it carefully and correctly. Read this manual carefully as
it contains essential information for a safe use of your amplifier.
3.1 Unpacking
Immediately inspect the package and its content so as to check
whether there are any signs of damage. After unpacking check
the product and all parts, if you notice any damage inform your
dealer immediately. It is advisable to save the packaging materials
even if the amplifier shows no sign of shipping damage; you might
have to return it to X-Treme or to one of its dealers. Use the original package only, which is the best way to protect the equipment
from shipping mishandling.
3.2 Installation/Assembly
All models of the X-Treme Digital Technology Series amplifiers may
be installed in a 19’’ standard rack strand. For the assembly 4
holes are present on the front panel; in order to get an optimum
fastening, that is important in movable systems, additional supports are placed on the back.
• Radio interferences
A sample of this product has been tested and approved to meet
the requirements of the Electromagnetic Compatibility Directive
(EMC). These requirements have been defined so as to provide
reasonable protection against dangerous interference of electrical equipment. Whenever this product has not been installed or
handled according to these guidelines, it might interfere with other
equipment such as radio receivers. However, there is no guarantee that they should not occur in a specific installation. Should
this equipment interfere with transceiver equipment (such possibility can be checked by switching on and off the device), the user
should try to cancel the interference by observing one or more of
the following measures:
- increase the distance between the device and the receiver;
- connect the device to a plug linked to a different circuit from the
one to which the receiver is connected;
- redirect or move the receiver’s antenna;
- make sure that the unit concerned conforms to the EMC immunity limits (CE-labelled). All electrical equipment sold in the EC
should be approved concerning the protection against electromagnetic fields, high tension and radio interference;
- contact qualified personnel.
fig. 1
fig. 2
Pay particular attention during the installation; we remind you that
the amplifiers should not be installed in places with:
• high temperatures;
• dust, excessive humidity or water next to the devices;
• presence of strong magnetic fields;
• vibrations;
• enclosed spaces that coud avoid airing.
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XTDT AMPLIFIERS
3.3 Front panel: controls and indicators
4 74
1210113 54 6 98
Fig.3 a) Front panel mod. XTDT3200 and XTDT3800
1210113 54 6 98
4 74
Fig.3 b) Front panel mod. XTDT4800F and XTDT6000F
1) Holes for the assembly
2) Holes for standard rack handles
3) Input attenuators
A precision attenuator for every channel with 21 positions allows
tuning of the amplifiers level for every channel.
Warning: when using a mono in bridge both level attenuators A-B (C-D) should be set to the same position.
Please set them to position 0 dB.
4) Signal LED
Every channel has a LED bar that shows the input signal level.
Green LED shows the presence of a signal and level -20 dB, yellow -10 dB.
5) Clip/Limiter LED
Every channel has a LED that lights up at clip point and when the
limiter activates.
6) Protection LED
Protection LED that lights up when the load voltage is under 1 Ω
or the amplifier output has been short-circuited.
Respectively: 0.1%, 1% and 10% of maximum power.
8) Hi-Temp LED
It indicates when the dissipator temperature starts increasing. At
60 ºC the Hi-Temp LED will start flashing and the output power will
be gradually reduced. At 75 ºC the Hi Temp LED will remain lit and
A-B channels (mod. XTDT3200 and XTDT3800) or A-B, C-D (mod.
XTDT4800F and XTDT6000F) will go into mute until the temperature reaches normal level, resetting is automatic.
Warning: this condition usually occurs due to inadequate
ventilation clearance, please check thoroughly the amplifier installation.
9) Active LED
It lights up to show that the amplifier is on and works properly.
10) Starting up push button
A soft-start system limits absorption when starting up.
11) Ventilation grid
Grid with sponge filters for proper ventilation of the amplifier and
to prevent dust infiltration.
Warning: do not block the ventilation entries.
7) Exp LED
It indicates that an optional expansion board has been inserted.
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