ELECTROCOMPANIET EC 4.9 User manual

EC 4.9

Unpacking the EC 4.9
Immediately upon receipt of the EC 4.9, inspect the carton for possible damage during shipment.
The carton and packaging have been designed to provide the safest possible protection
for transport of your preamplifier.
Unpack the unit carefully. ave all packaging materials for future shipment.
The contents of the carton
1 pcs Electrocompaniet EC 4.9 (preamplifier)
1 pcs AC mains cord.
1 pcs inspection card.
Set up procedure
Before connecting the EC 4.9 to the mains, check that the main voltage indicated on the
rear panel corresponds to the line voltage in the territory where you intend to use the unit.
How to avoid damages
Do not under any circumstances connect or disconnect equipment when power is turned on.
The design of the RCA plug generates a huge transient when inserted.
Connecting or disconnecting equipment with the power on can result in severe damage
to both speakers and amplifier.
How to avoid noise problems
The EC 4.9 contains delicate circuits that are sensitive to magnetic stray fields.
The unit should not be placed near main transformers, TV sets, etc. Care should also be
taken regarding placement of the interconnect cables. Do not run interconnect cables in
parallel with main cords or speaker cables. Keep interconnect cables as short as
possible.
How to avoid possible antenna problems
In some set-ups hum may occur when you connect the radio, VCR or TV to your system.
The problem is caused by DC voltage coming from your antenna.
Please contact your cable network operator.

How to connect our s stem
See illustration 1 and illustration 3
Inputs
ingle- ended operation:
All inputs are similar regarding sonic performance.
Unused inputs may be shorted to ground, using a RCA shorting plug.
Balanced operation:
There are three set of balanced inputs.
Two set for 6 channel operations, labelled Input 1 and Input 2, and one set for 2 channel
operations labelled CD.
Note that the two 6 channel inputs may also be used for 2 channel operations.
Outputs
REC:
Rec outputs are used for recording.
The source you listen to will be monitored through this output.
The record function is not influenced by the volume control setting.
Never use shorting plugs in outputs.
LINE OUT:
The line out is a variable output, dependent on the volume control setting and MUTE function.
These outputs controls the power amplifier(s).
PAC:
These contacts are used to communicate with power amplifiers AW 2x120 and AW 3x120.
Connect a PAC Com cable (sold separately) from PAC A to one of the amplifier and PAC B to
the other. When these cables are connected to the amplifiers the amplifiers will automatically switch
to mono mode when running 2 channel sources.
PAC Multi is reserved for future use.
DATA:
Connect an U B cable from the DATA port to a PC to upgrade the software on the EC 4.9.
REMOTE CHARGE:
Connect the remote ECT2 (sold separately) to this port to charge the remote.

Front panel
See illustration 2 and illustration 3.
The main switch is located in the centre of the lower part of the front panel.
The four buttons on the right-hand side of the front panel is used to adjust the volume and
select the input source.
Use the up and down buttons to adjust the volume, and the left and right buttons to select
input source.
The available input sources are:
In 1 : 6 channel balanced operation on source connected to Input 1.
In 1 - 2 Ch : 2 channel balanced operation on source connected to Input 1.
Only Front Right and Front Left input will be used.
In 2 : 6 channel balanced operation on source connected to Input 2.
In 2 - 2 Ch : 2 channel balanced operation on source connected to Input 2.
Only Front Right and Front Left input will be used.
CD : 2 channel balanced operation on source connected to CD input.
Tuner : 2 channel single ended operation on source connected to Tuner input.
Tape : 2 channel single ended operation on source connected to Tape input.
DVD : 2 channel single ended operation on source connected to DVD input.
In daily operation, switch off the EC 4.9 by turning the volume control down.
When the EC 4.9 is not to be used for a long period of time, use the main switch to turn the unit off.
Then disconnect the AC main cord for maximum safety.
Navigator window
This window on the left-hand side of the front panel shows what source that is currently
active and the current listening volume.
How to power up our s stem
You should always power up your system in the following way:
ignal sources (CD player, tuner, etc.) first, then the EC 4.9.
Allow a 30 seconds warm-up before you turn on the amplifier.
When switching off our s stem
tart with the amplifier, then the EC 4.9, then the signal sources.

Input configurations
XLR input: 1 = ground 2 = positive 3 = negative
RCA: Circle = ground Centre = positive
Output configurations
XLR output: 1 = ground 2 = positive 3 = negative
peaker: Red = positive Black or White = ground
RCA to XLR adapter: 1 & 3; ground and negative = shorted, 2 = positive
Technical specifications EC 4.9
The following technical data were measured on randomized test objects and are typical data.
All measurements are made at 120V / 240V // 50Hz / 60Hz
Measurements Single ended Balanced
Input impedance 47 kOhm 47 kOhm
Output impedance 100 Ohm 100 Ohm
Maximum gain 6 dB 6 dB
Minimum gain - 111 dB - 111 dB
Noise floor (0 dB gain) < -130 dB < -130 dB
THD (1V in, 1V out) -120 dB -130 dB
Max input +- 15Vp-p +- 30Vp-p
Max output +- 30Vp-p +- 30Vp-p
Frequency response 1 – 200 kHz 1 – 200 kHz
Channel separation > 120 dB > 120 dB
Power consumption (no load or signal) 30 W
The EC 4.9 is DC coupled from input to output.
Dimensions
Width: 483 mm
Depth: 405 mm
Height: 125 mm
Weight: 12 kg
pecifications subject to change without notice.

Important Notice
For optimal sonic performance, the EC 4.9 should be burned in for a minimum time of 72
hours.
If the EC 4.9 has been switched off, allow two hours of warm-up for optimal sonic
performance.
Proper ventilation is important.
Never cover the ventilation area.
A good rule of thumb is to allow at least 3 - 5 cm (1 - 2 inches) of air sidewise, and 5 - 8
cm
(2 - 3 inches) above the EC 4.9.
If service is needed
Your dealer will have all relevant information regarding the service center in your area and
will ensure that your unit is serviced with minimum delay.
It is our general policy to have your unit returned to you within five working days.
This is an average time and can vary locally, depending on the workload at that particular
service centre.
If, for some reason, there are no service facilities available in your country, please ship the
unit to the following address:
ELECTROCOMPANIET A ,
BREIVIKVEIEN 7,
4120 TAU,
NORWAY
witchboard: [phone] Fax: [phone] ervice: [phone]
E-mail: [email protected]
Web: www.electrocompaniet.no
ervice department: [e-mail]
The end-user is responsible for all shipping charges, insurance, and re-importation and
duty charges.
When shipping a product to the factory for service, always include the following:
1. A sales slip or other proof of purchase if repair is claimed under warranty.
2. A proforma invoice with value of goods, stating that the amplifier is being returned
to Norway for repair.
3. An accompanying letter describing faults, symptoms, or problems with the unit.
4. Always ship the unit in its original carton and packaging material to prevent damage
in transit. Electrocompaniet will not cover damages incurred in transit.
If you require further information concerning the operation of the unit or if you have any
questions related to service, please do not hesitate to contact your dealer or national
distributor.

Illustration 1 – Back panel
Illustration 2 – Front panel

Illustration 3 – Channels used
Source Input channels used Output channels used Additional information
In 1
6 Channel
In 1. Front Left, Front
Right, ub, urround Left,
urround Right, Centre
Front Left, Front Right,
ub, urround Left,
urround Right, Centre
In 1
2 Channel
In 1. Front Left, Front
Right
Front Left, Front Right Multichannel amplifiers will
be bridged to mono mode if
connected to pac A or B
In 2
6 Channel
In 2. Front Left, Front
Right, ub, urround Left,
urround Right, Centre
Front Left, Front Right,
ub, urround Left,
urround Right, Centre
In 2
2 Channel
In 2. Front Left, Front
Right
Front Left, Front Right Multichannel amplifiers will
be bridged to mono mode if
connected to pac A or B
CD CD – Balanced Front Left, Front Right Multichannel amplifiers will
be bridged to mono mode if
connected to pac A or B
Tuner Tuner – ingle ended Front Left, Front Right Multichannel amplifiers will
be bridged to mono mode if
connected to pac A or B
Tape Tape – ingle ended Front Left, Front Right Multichannel amplifiers will
be bridged to mono mode if
connected to pac A or B
DVD DVD – ingle ended Front Left, Front Right Multichannel amplifiers will
be bridged to mono mode if
connected to pac A or B