ELECTROCOMPANIET AW 250R User manual

AW 250R
Balanced Poweramplifier
Owner’s Manual
ENG

Unpacking the amplifier:
Immediately upon receipt of the amplifier, inspect the carton for possible damage during
shipment. If the carton is visibly damaged, a claim must be filed with the carrier as soon as
possible.
Unpack the unit carefully, and please do remember to save all packaging materials for
future shipment. The carton and packaging have been designed to offer the safest possible
protection when transporting your amplifier.
The content of the carton is as follows:
1 pcs Electrocompaniet Ampliwire 250 DMB-R
1 pcs AC power cord
1 Owner's Manual
1 pcs Spare fuse, 10.0 AT slow-blow 5x20mm (120V AC)
5.0 AT slow-blow 5x20mm (240V AC)
The actual spare fuse is located inside the AC 3 pin receptacle.
Connecting the AW 250 DMB-R
Connecting to mains
Check that the mains voltage printed on the rear panel of the amplifier corresponds with
the line voltage in the territory were you intend to use your amplifier.
How to avoid damages
A good operating practice is to turn off all equipment before any connections or
disconnection’s are made. Do not under any circumstances connect or disconnect
equipment when power is turned on. If you insist on connecting or disconnecting while
power is turned on, you should be aware that the design of the RCA plug generates a
large transient when inserting the plug. This could damage both the speakers and the
amplifier.
The rear panel
The rear panel of the Ampliwire AW 250 DMB is equipped with two sets of RCA input
sockets, marked + and -, and one XLR female socket, for each channel.
Single-ended (RCA) input and operation
Upon arrival, the amplifier is set for single-ended use with a shorting plug in the negative
RCA input.This will short the negative (-) input of the amplifier to ground. With shorting
plugs in position, the amplifier is ready to be connected in a normal way with a single
ended preamplifier.

Balanced XLR input and operation
The balanced mode can only be used if the preamplifier has a balanced output. In order to
use the balanced XLR- input, turn off the amplifier, and remove the shorting plugs from
the negative (-) RCA inputs.Use an XLR interconnect with GND on pin 1, + on pin 2 and -
on pin 3.
Balanced RCA input and operation
The balanced mode can only be used if the preamplifier has a balanced RCA output. Be
sure the amplifier is turned off. Remove the shorting plugs. Use 2 single (1 stereo)
interconnect cables from the preamplifier to each channel of the power amplifier, connec-
ting + and - outputs from the preamplifier to the + and - inputs of the corresponding
channel on the amplifier.
Make sure the + and - are not interchanged, as this will cause the system to operate out of
phase, with very poor bass response as a result.
Operating instructions:
How to turn on your system
You should always turn on your equipment in this order: Signal source devices (CD, tuner,
etc) and preamplifier are turned on first. Allow 30 seconds of preheating before you turn on
your power amplifier.When turning your system off, you should start by switching off your
power amplifier, then the preamplifier, and finally your signal source devices
After switching on the power amplifier, there will be a 5 seconds delay before the speakers
are connected. This will prevent large turn on/off transients to reach the speakers.
Replacing a blown main fuse:
Always remove the AC cord from the Inlet
The main fuse is located inside a small drawer in the AC inlet of the unit. If, for some
reason the fuse blows, turn the unit off, and remove the AC cord from the inlet.
Open the drawer with a small screwdriver and remove the broken fuse. The spare fuse is
located in the hole in front of the main fuse. Push the new fuse gently out of the hole, and
place it in correct position (where the blown fuse was removed). Push the drawer gently
back to the closed position, connect the power cord and turn the unit on.
Never replace a blown fuse with other values than printed on the unit.

Warning:
The amplifier will be warm.
Due to the high class A operating point used in the Electrocompaniet design, it is normal
that the amplifier feels warm. Proper ventilation will be needed, and the amplifier should
not be covered. A good rule is to allow 1 - 2 inches of air sidewise, and 2 - 3 inches
above the amplifier.
If placing the amplifier on the floor, be aware of carpets that can obstruct the ventilation
underneath the amplifier.

Service Policy:
When service is needed
Your dealer will have all relevant information about the service centers in your area, and
will ensure that your unit is serviced without delay. It is our general policy to have your
amplifier returned to you within 5 working days. This is an average time, and could vary
locally, depending on the work load at the service center.
If, for some reason, there are no service facilities available in your country, please ship the
amplifier to the following address:
Electrocompaniet as
Breivikveien 7,
N-4210 Tau,
E-mail : [e-mail]
www.electrocompaniet.no
You are responsible for all shipping charges, insurance, re-importation to your country, and
duty arrangements. 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 the goods, stating that the amplifier
is returned to Norway for repair.
3) An accompanying letter describing faults, symptoms, or problems
with the amplifier.
4) Always ship the amplifier in its original carton and packaging
material to prevent damage in transit.
Electrocompaniet will not accept responsibility for any damage caused in transit,
how ever caused.
If you require further information concerning the amplifier operation, or if you have any
questions related to service, please do not hesitate to contact your dealer or your national
Electrocompaniet distributor.
Norway

Technical Specifications AW250R :
The following technical data were measured on randomised test objects and are typical
data.
Amplifier section
Main voltage 120 V / 240 V.Clipping point of the amplifier is set to a level where total
harmonic distortion (THD) is 0.2 %.
Output Impedance (20 Hz - 20 kHz) < 0,008 Ohm
RCA (single) input impedance 220 kOhm
XLR (balanced) input impedance 110 kOhm
Input sensitivity for rated output 1 V
Max. peak current > 100 A
THD (measured at 1 kHz half power, 8 Ohm) < 0,001 %
THD (measured at 1 kHz -1 dB, 8 Ohm) < 0,001 %
Noise (measured with both inputs shorted)
400 Hz - 30 kHz : 90 µV
10 Hz - 30 kHz : 100 µV
Rated output power
10 % change in line voltage will give app. 20 % change in output power.
8 Ohm 2 x 250 W
4 Ohm 2 x 380 W
2 Ohm 2 x 625 W
Power consumption (no load or signal) 230 W
Dimensions
Width 483 mm / 19 inches
Depth 450 mm / 17 inches
Height 210 mm / 8.2 inches
Weight 39 kg. / 85.8 lbs.
The manufacturer reserves the right to alter these specifications without further notice.

Made in Norway
W W W .ELECTRO CO M PANIET.NO