eamlab Studio300 User manual

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Model Studio300
HI-END stereo power amplifier
User manual English
Models for Europe
230 Vac –50 Hz.

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Safety information :
1. For best performance, please read
this manual carefully.
Keep it in a safe place for future reference.
2. Install the unit in a cool, dry, clean place
away from windows, heat sources, intense
vibration, dust, humidity, cold, and sources of
humming (transformers, motors, etc.).. To
prevent fire or shock hazard do not expose the
unit to water and moisture.
3. Never open the equipment. If something
should get into all 'inside, contact your dealer.
4. Do not operate the switches and other
controls with force. When moving the unit, first
disconnect the power cord and cables
connected to other devices. Never pull the
wires themselves.
5. The openings of the lid provides adequate
ventilation of the unit. In case of obstruction of
the same, the temperature inside the rooms
very quickly.
Then install the unit in a well-ventilated place,
avoiding placing various objects in front of
these openings to prevent fire and damage.
Leave a space of at least 20 cm behind, 20 cm
on both sides and 30 cm above the top panel
of the machine to avoid fire or other damage.
6. The voltage used must be specified.
Using this product with a current whose
voltage is higher than specified is
dangerous and may cause fire or other
damage. EAM LAB is not responsible for any
damage due to an incorrect use of the
appliance
Warning: device subjected to voltage 115Vac 50/60Hz.
To avoid risk of electric shock do not open the lid, do not
expose to moisture or rain, not groped repair on their own
but refer only to trained
To avoid damage do not superimpose. make
the goods always travel with their packaging,
throw and avoid placing material on your
device.,
WARNING: BEFORE YOU START TO USE READ AS FOLLOWS
INFORMATION

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DATASHEET (RMS power both cannel driven to 20 hz at 20 Khz)
8 Ohm 210+210 W
4Ohm 360+360 W
2 Ohm 560+560 W
THD 0.02% ( 900Hz full power @ 8Ohm )
Input impedance 47 Kohm bilanced/ 25 Kohm single ended
THD Vs freq. +/- 0,2% to 5Khz & 20Khz
S/N ratio >110 db
DF >180 (150Hz @ 4 Ohm )
Max V output 43V
Max current drive 42A
Measure 470 x 250 x 310 mm
Weight 28Kg
Compsumption (@ 230Vac full power) 6 A
Input connector XLR neutrik and RCA /
Output connector VBT binding post 8mm wire
Line filter Schaffner 15 A
protection THL –SVCS –ILP –IDCL
safety 90° thermal switch

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Unpacking :
Carefully remove from the box your Amplifier
and keep the original carton and packing
materials for future trips, expeditions or long-
term storage.
Introduction :
first of all thank you for choosing our a power
amplifier. Amplifier built on modern and
reliable high construction standards and with
high-quality components of the latest
generation. Every model of HA is tested
according to strict functional testing to ensure
high reliability in all conditions and provide
high performance sound unchanging for long
periods of time. The 5 year warranty on every
component that constitutes the amplifer is
further proof of its reliability.
The high power available allows you to enjoy
your music in full harmony without ever
listening fatigue and dynamic compressions.
Precautions :
For the high power can be supplied to ensure
that the speakers connected to it are able to
withstand these powers worth the irreparable
damage to speakers connected.
Before the installation :
remove your amplifier, taking care to keep it
in the future if you ever require to be shipped
to a service center EAMLAB to be overhauled
or repaired.
Installation :
thanks to its ease of use, there are no
particular notes of difficult interpretation.
Before making any connections, make sure
that the amplifier is turned OFF, preferably
with the mains plug is disconnected to avoid
unwanted random ignitions. Connect to the
output terminals of the speaker cable of at
least 2.5 sq mm cross section being
particularly careful to observe the correct
polarity to avoid unpleasant steps against
acoustic ranging to compromising the overall
noise. The section of the power cable that
feeds the wall outlet where the amplifier must
be connected to at least have a diameter of
2.5 mmq. For model HA600 and at least
1.6mmq. for HA300. This is to ensure the
amplifier always the right energy reserve
when it is subjected to high dynamic musical
passages.
It should be best to treat this aspect of the
electrical installation if you intend to use the
most of our amplifiers.
Preparation

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Pannel Front controls:
fig.A.
1. ILPTM intelligent lock power
Indicates the operating status of 'amplifier
Indicates the operating status of the thermal and DC protections.
3 . ON/OFF Switch

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Ready to Power on
After making all connections correctly we are
ready to turn on the amplifier.
You just made, the amplifier performs some
set in the reset to ensure a safe operation, this
is true both in power-on switch-off.
As sometimes happens the major problems of
high power amplifiers take over at power on
or power down.
Our amplifiers HA series are designed not to
lie in this unfortunate situation.
Pressed the power switch on the front panel,
the two LEDs ILPTM (see fig. A) will flash for
about 3 seconds and then stay on steady.
These LEDs indicate the operating status of
the protections that serve different functions
listed below:
ILPTM (intelligent lock power):
At Power on:
1 - connect the speakers out after about
3 seconds (delay antibump). The LEDs
become fixed after about 3sec.
2- resets the parameters of current and
voltage of the output stages to ensure
maximum efficency
3- immediately disconnects the load in case of
failure of the transistors
4 -disconnect the load in the event of a short
circuit on the output stages
5 - disconnect the load in the event of a short
circuit on the power cables
6 -disconnect the load in the event of
prolonged clipping without damaging the
speakers.
At the power off
1- immediately disconnects the outputs from
the load
If the LEDs flash always:
In remote eventually that something can
impair circuit ILPTM quickly intervene
immediately disconnecting the load and
blocking the amplifier. The LED or two LEDs
(the 2 channels have 2 independent circuits
ILP) will flash warning that something went
wrong during the operation.
note: the circuit ILPTM also intervenes when
the DC output offset should increase coming
from the parameters set in the factory.
Function and protection

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Proceed as follow :
turn the amp off and wait about 3 minutes to
make sure that the circuit ILPTM resets every
parameter.
turn on the amplifier and observe the return
to normal operation with LED ILP returning
fixed.
if the problem persists (LED always blinking)
contact a service center EAMLAB.
Note :
it may happen sometimes, after the
intervention of the circuit ILPTM, which is
switched on again, the LED or LEDs come back
fixed but the amplifier does not emit any
sound.
This means that the circuit ILPTM is working
again and the relay circuit that releases the
load does not detect the DC component in the
output because the circuit ILPTM the block in
advance if it detects abnormalities in the
output stages.
Even in this case, contact the service center.
Instruction :
In any case, do not ever groped to solve the
problem alone, but immediatamnete contact
theservicecenter.
Any unauthorized intervention by
EAMLAB immediately void the warranty.
THLTM thermal overload
The thermal protection system THLTM is
activated only in the case in which the
operating temperature of the final stages
exceeds the threshold of 90 °.
The intervention THL will be signaled by the
fixed LEDs on the front panel (see fig.) these
LEDs will light when the heatsink temperature
reaches 70 ° and the circuit tries to keep it
stable working on current values and
polarization of the power stages.
If the temperature still rise THLTM circuit turns
off the relay to speaker at 90 °
If the system THL activates :
1. You can power off the amplifier and
Letting it cool.
You can reset the amplifier on and leaving him
waiting for the circuit automatically resets the
optimal values.
Notes:
All amplifier control and protection
circuits are explained in the guide
ENGINEERING PRODUCT.
Consult this guide to understand how
it works

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Connecting schematics

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Studio300 HI-END REFERENCE POWER AMPLIFIER
Ingegneria prodotto
PROJECT AND TYPE
Studio300 are amplifiers with exceptional characteristics and are part of the Reference EAM LAB. in
these amps there is a wealth of technical solutions and cutting-edge design for which they have
committed since the products for a long period of testing procedures and, thanks to prudent choices
of components and materials, have allowed him to become a full title of the best HI-END devices on
the market. They differ from each other only for the power factor.
The circuitry is typically push-pull AB class with a differential asymmetrical input stage and Wilson
current mirror type. The choice of this circuit topology is dictated by the high voltage to which they
are subjected amplification circuits. we did not want to opt for a solution to more bias voltages due
to a better linearity of the frequency response and speed of propagation of the signal that can
ensure this technique. In addition, the high polarization allows amplifiers HA as to work for the first
10 W in class A before moving to the increase of the output current to the load. This factor has
allowed us, together with other technical solutions listed below, to maintain minimum the size of
the cabinet while having available powers with extraordinary high current delivery.
The amplification of the signal is entrusted to 12 power devices of last generation for each channel
capable of dissipating each one more than 15A of DC current. These final, together with all the active
components of the circuit, have been selected based on the data of bandwidth that we wanted very
extended. This detail is able to maintain high speed signal transfer between input and output that
have never been reached up to this moment. The HA amplifiers set a new standard for the control
of the speaker and the difference with conventional amplifiers is clear. Speed detail and
transparency are obvious and easily comparable.
The guarantee of having a sound timbre always correct even at high volumes with these amps
became a reality. The frequency response thanks to the goodness of design, technical solutions and
the finest materials is always clear and precise in all conditions of use, load and age.
CONTROLS AND PROTECTION
In addition to the tonal coherence for amplifiers HA 300 HA600 and we wanted it proves reliable
operation under all conditions. That is connected to the complex and difficult load , although it is
used in an inappropriate manner we EAM LAB we wanted a 'power amp in the first place that
ensures reliable and trouble-free operation and long-lasting whenever the "ON" button is pressed .

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ILP TM (Intelligent Lock Power)
The protections ILP system including in a single circuit 3 different functions.
detects any DC currents present on the end devices, blocking the exits and disconnecting the load
connected. In this regard the task is entrusted to 2 Relay 30A with more than 500,000 cycles of contact.
ILP is not a simple DC dector but a system of protections more complex able to warn each minimum
variation of DC output voltage. even in case of prolonged clipping circuit intervenes. Working in tandem
with IDCL these two devices are able to provide unmatched reliability for this amplifier.
IMPORTANT :
IDCL TM (Impedance Detecting & Current Limiting)
Tutte le protezioni attive presenti nei circuiti di
amplificazione sono progettate affinchè non
possano intervenire in nessun modo sul
segnale audio che potrebbe invece degradare
come avviene in molti casi su amplificatori non
progettati a dovere.
IDCL is a protection circuit that
constantly monitors the output current of
the power output by comparing it with the
load impedance. the circuit IDCL
intervenes in the case in which the
output current were to increase for
several reasons. With this method you
can use Studio300 also with the next
short-circuit impedance loads without
the slightest hint to failure.
The circuit IDCL is not a limiter but a real
"protection" and its current intervention
is not noticeable on the signal.
A side of the circuit is represented in its simplified
part.

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SVCSTM (Servo Controlled Current State)
The power amplifier must be treated appropriately imposing and its management is entrusted to
this circuit. The currents in the game, often very high, they are always kept under control even when
the amplifier is turned on to begin work. To prolong the life of exceedingly transformer and
capacitors the supply voltage is brought to regime only after a few seconds and not all at once. You
go from a 30% to 100% in about 4 seconds after. In addition to this useful function l 'SVCS controls
the power supplied from the transformer and limits the operation only in the event of excessive
thermal dissipation gradually lowering the yield up to 70% of its capacity.
THLTM (Thermal Heat Limiting)
The temperature of the end devices is handled by this circuit which always guarantees the correct
operation even in the event of excessive thermal stress. The circuit is activated when the
temperature on the heat sink reaches the threshold of 70 ° c. and makes sure to keep it stable within
a tolerance of 10% by acting on micro-variations of the polarization of the final stages.
The two LEDs on the front panel indicate the operation of the circuit THL. this is a condition that
occurs after a few hours of operation (in some cases after a few minutes, depending on the load
connected) and the amplifier in this condition can work continuously without the slightest problem
for many hours yet.
A thermal circuit breaker at 90 ° c. is however placed in series with the supply line to a further
guarantee of safety intervention. In the unlikely event that the circuit THL does go faulty circuit
breaker switches off the amplifier and turns it back on automatically when the temperature falls
within the parameters of safe operation.
EAM LAB Milano Italy –Copyright 10/7/2010 –www.eamlab.com –all right reserved