Jadis SE845Nec User manual

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Power amplifier
Ownerrs Manual

Table of contents
Introduction
Warning
Unpacking and checking
Description
Installation instruction
Tube position
How to match your amplifier to your loudspeaker
How to turn ON your amplifier
Maintenance
Specifications

|-
Read
manipulation.
V/arning
this document thoroughly
Then read step by step when before any
installing.

IJnpacking and checking
The SE845Nec amplifier has been packed in a box that has been
specially designed for it. Do not throw away this box as it will be
needed for re-packing the unit when it has to be returned to the factory for
maintenance or upgrading. Please note that the warranÿ will be considered
as cancelled if the unit has been dispatched incorrectly packed.
The boxes should contain: Two modules blocks amplifier, its
tubes, two mains power cables and one 6-sided spanner which is used to
remove the covers of the units to allow the tubes to be changed
necessary. when

Description
Front View
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SE845Nec
On the front side of the amplifier, you will find:
- The power switch ON/OFF.
- The Power led, green when the unit is turned on.

Back View
On the back side of the amplifier, you will find:
- The Input connectors.
- Two channel output connectors for loudspeaker
Description of XLR Input (Balanced model onl)r)
-Pin 1 : Ground
-Pin 2: Plus
-Pin 3 : Minus

Installation instructions
Read this carefully
Optimum listening quality is obtained when the following
recommendations have been observed step by step.
1 - Each Jadis amplifier unit is packed with its own tested tubes.
Place the tubes: be careful not to mix up the tubes and place them
immediately on to their corresponding place as indicated in the « Tube
position » .
2 - Place your Jadis amplifier on a flat, solid surface. Avoid placing
the units directly on a carpet or on inflammable materiaL Avoid placing
objects on top of the amplifier to ensure adequate ventilation.
3 - Because your Jadis is a tube amplifier, provide an open space to
allow a correct evacuation of heat. Do not try to cool your Jadis
amplifier with a fan or expose it to air currents: sudden cooling can
create microcracks on the tubes. Do not move your amplifier when the
tubes are hot.
4 - Always turn on your preamplifier before turning on the amplifier.
Reverse the procedure when turning off your amplifier. To ensure long term
reliability the ON/OFF power switch must be operated with a quick firm
movement. Always use the ON/OFF Switch. Never unplug the mains cord
to turn off the unit. If it is necessary to change a cable or to modiÿ a
connection, make sure the amplifier and the preamplifier have been
switched off for a least three minutes before proceeding.

Tubes position
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Tubes Installation:
First of all, remove the grid which protects the tube sockets (be sure
the mains connector is unplugged).
Attention: For mounting the tubes, do not force them, this may
damage the sockets. Be careful at dressing power tubes because they have
stop pins on the central parts of the mounting base.
Mount first the drivers tubes (smallest ones) and then mount the
power tubes. The tubes placement is shown at pages before.
Replace the grid and never remove it when the amplifier is
connected to the mains voltage, whether it is running or not.

How to match )rour amplifier to )rour
loudspeakers
The load impedance is pre-adjusted in
from4to8ohms.
The technical characteristics of the
impedance adaptation from I to 16 Ohms.
the factory for loudspeakers
Jadis amplifiers allow aî
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How to turn ON our amolifier
In order to get the best performance from your Jadis amplifier, it is
necessary to follow carefully the instructions below:
1- Check that the power switch is OFF.
3- Connect the loudspeaker wires to the red and black terminals
the back of the amplifier.
4 - Connect the interconnect cables between the preamplifier
outputs and the amplifier input connectors.
5 - Connect the mains cord of your amplifier which is detachable to
facilitate safer and easier moving of the unit. Always use the power cord
supplied or one of equivalent electrical rating. Insert the power cord into
its socket on the unit before plugging the other end to the mains network.
Your Jadis amplifier is now ready to operate. However, its optimum
sound quality will reached only when the amplifier reaches its ideal
temperature (after about t hour of operation).
To turn ON and OFF your amplifier, always use the power switch. Do
not plug and unplug the main cord to turn on and off the unit.
2-

Maintenance
Your Jadis amplifier is adjusted for a nominal voltage
coffesponding to your country's electrical network.
If the amplifier fails to operate:
I - Turn OFF the unit immediately.
2 - Unplug all the cables.
3 - Do not forget the mains cord.
4 - Contact your Jadis dealer for diagnostic and repair.
To clean your amplifier, use a soft cloth with a non abrasive
cleaning product.
Do not forget to unplug all connectors before cleaning.

SE845Nec specifications
Load impedance:
Output Power at lkllz:
Bandwidth at -3 dB:
Sensitivity for rated output :
Input impedance:
Maximum power consumption:
Dimensions:
\Meight:
Subject to modification.
I to 16 Ohms
40 Watts
2}Hzto 38 l<LIz
560 mV.
> l00k Ohms
250 W per unit
68x30x29cm
45 kg each unit

\N/ARRÂNTY
JADIS s.A.R L rvarrants the components of your Jadis product for a
5-year penod frorn the purchase date.
In the event of fajlure of your Jadis product, JADIS s.A.R L. will repair
and readjust and" should the occasion anse. u'ill replace the units pro-
viding that all the clauses contained in the rvan'ant1,.are met.
In order to initiate senice of any kind it is necessary to obtain prior dis-
tributor or dealer authorization and then ship the unit prepaid
Any of the foliowng conditions shall void the warrant_v :
1- Operations not in accordance with this manual.
2 - Abuse, accident or unauthorized modifications as determined bv
JADIS S.A.R.L. exclusively
3 - Removal, defacing or falsifying of the serial numbers.
4 - Shipping without the complete factor.y cartons.
JADIS s.A,R L. shall nor be liabie for anv accidental damages regarding
operation, failure, trouble-shooting or repair ofyour Jadis product.
Tube \4iarranh
The tubes used on Jadis products are selected ans tested by Jadis. but the-v are in no ryay
covered by this present rvarranÿ. The only waranty that apflies to any tubois the warranry,
if there is one, provided by the tube manufacturer.