ELECTROCOMPANIET EC 4.7 User manual
GB
USA
EC 4.7
Unpacking the EC 4.7
Immediately upon receipt of the EC 4.7, 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. Save all packaging materials for future shipment.
The contents of the carton
1 pcs Electrocompaniet EC 4.7 (preamplifier)
1 pcs AC main cord.
1 pcs inspection card.
1 pcs remote control.
2 pcs batteries.
Set up procedure
Before connecting the EC 4.7 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 4.7 contains delicate circuits that are sensitive to magnetic strayfields.
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.
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How to connect your system
Please read this page carefully and follow diagram 1.
On the rear panel you will find a switch to adjust the gain in the amplifier.
Use this switch to accommodate the signal source to the amplifier. This switch will also
affect the HT input.
Inputs
Single- ended operation:
The left channel is the top row on the rear marked black.
All inputs are similar regarding sonic performance.
Unused inputs may be shorted to ground, using a RCA shorting plug.
To use the balanced input single ended, connect the ECP5XLR in the XLR
Outputs
REC:
Tape 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, but will be shut off by
the MUTE function.
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 (balanced and single- ended) control the power amplifier.
If more than one amplifier is used, and these amplifiers are DC coupled on the input side,
they will influence on each other when the amplifiers are switched on/off.
To avoid any problem, these amplifiers must be turned on/off simultaneously.
Never use shorting plugs on the outputs.
How to power up your system
You should always power up your system in the following way:
Signal sources (CD player, tuner, etc.) first, then the EC 4.7.
Allow a 30 seconds warm-up before you turn on the amplifier.
When switching off your system:
Start with the amplifier, then the EC 4.7, then the signal sources.
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Remote control Diagram 2
1. Input selector CD, TUNER, TAPE, DVD, VCR, AUX.
2. Mute on / off
3. Volume up
4. Volume down
Front panel Diagram 3
The main switch is located in the center of the lower part of the front panel.
In daily operation, switch off the EC 4.7 by using the MUTE button on the remote control.
If the EC 4.7 has been switched off, allow two hours of warm-up for optimal sonic
performance.
When the EC 4.7 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 Diagram 3
The six icons shown on the left-hand side of the front panel have the following functions:
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CD
Compact disc
Single ended RCA or
balanced XLR
TUN
Tuner
Radio
Receiver
TAP
Reel to reel
Music cassette
Digital audio tape
DVD
Digital versatile disc VCR
Video cassette
Recorder
Satellite tuner
Television
AUX
Riaa
Auxiliary
Mini disc
Personal computer
Television
Replacing remote control batteries Diagram 5
Replace used batteries by gently inserting your fingernail or small screwdriver in the
groove on the left side of the battery compartment cover.
Lift the cover off and insert a fresh set of batteries.
Be careful to follow the + and – polarity indications at the bottom of the battery compartment.
Battery: 2 x LR03 /AAA: 1.5Volts
Input configurations Diagram 6
XLR input: 1 = ground 2 = positive 3 = negative
RCA: Circle = ground Center = positive
Output configurations Diagram 6 and 1
XLR output: 1 = ground 2 = positive 3 = negative
Speaker: Red = positive Black or White = ground
RCA to XLR adopter: ECP5XLR: 1 & 3; ground and negative = shorted, 2 = positive
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Technical specifications EC 4.7
The following technical data were measured on randomized test objects and are typical data.
All measurements are made at 120V / 240V // 50Hz / 60Hz
Clipping point of the preamplifier is set to a level where total harmonic distortion (THD) is 0.2 %.
Measurements Parameters Single ended Balanced
Input impedance (Fixed) 330 Kohm 165 Kohm
Input level (RMS) >10V>20V
Equivalent input noise < 3 mV
Signal to noise (400 - 30 KHz) > 100 dB
Channel separation (20 - 20KHz) > 90 dB
Frequency response (DC-65 KHz) - 0.4 dB
Gain (Maximum volume) 0dB6dB
Attenuation (Minimum volume) - 75 dB
Output Impedance (Fixed) 100 ohm
Output level (RMS) > 8 V > 16 V
THD (1Vin,1Vout,1KHz) < 0,001 % < 0.0005 %
Output noise (400 – 30 KHz) < 5 mV < 10 mV
Rated output level
10 % change in line voltage will give approximately 10 % change in output level.
Power consumption (no load or signal) 15 W
The EC 4.7 is DC coupled from input to output.
Dimensions
Width: 483 mm - 19“
Depth: 410 mm - 16.1”
Height: 115 mm - 4.5”
Weight: 8 Kg - 17.6 lbs.
Specifications subject to change without notice.
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Important Notice
For optimal sonic performance, the EC 4.7 should be burned in for a minimum time of 72
hours.
The easiest way to burn in your EC 4.7 is to put a signal at any input, without the speakers
connected.
In daily operation, switch off the EC 4.7 by using the MUTE button on the remote control.
If the EC 4.7 has been switched off, allow two hours of warm-up for optimal sonic
performance.
Due to high class A operation in all Electrocompaniet designs, it is normal for the EC 4.7
to feel warm.
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 4.7.
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 center.
If, for some reason, there are no service facilities available in your country, please ship the
unit to the following address:
Electrocompaniet as,
Breivikveien 7,
N-4120 Tau,
Norway
Web: www.electrocompaniet.no
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 dam-
age 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 your
national distributor.
USA GB
Fax: 47 51 74 10 10
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