ASR Emitter I HD User manual

Operating manual ASR Emitter I HD and II HD Page 1
ASR Audio Systems Friedrich Schäfer P.O. Box 1722, D- 35 727 Herborn +49 27 72 / 4 29 05
We thank you for your confidence set into our firm and our product and request you a lot of joy while
listening music with your new ASR Emitter!
We as manufacturers, the firm ASR Audio Systems Friedrich Schäfer, produced for you the Emitter with
great care exclusively with highest quality and selected components.
If you have questions that your dealer can’t answer, please, call us during the normal business hours, Monday
till Friday from 7.30 to 15.00 o'clock middle European time.
The operating manual consists of two parts : The essential basics are discussed at first,
the details are explained more precisely in the following part.
Table of content
The operating concept of the Emitter, unpacking of the equipment, Scope of delivery Page 2
Set up and power connection of the Emitters Page 3
The grounding of your equipment, the ground lift switch, the accumulator power unit Page 4
The run in period, the connection of devices at the input Page 5
Direct input, connection of a tape deck or of an auxiliary equipment Page 6
The connection of loudspeakers, second output, headphones, direct output Page 7
Operating elements of the Emitter Page 8
Controls and remote control of the Emitter Page 9
Table of the remote control keys and its meaning Page 10
Tuning of the balance and the level adjust Page 11
Tuning of the display and of the energy saving circuit Page 12
Set up of the configuration, function control LED’s Page 13
Protection circuits : Short circuit, distortion switch off, offset, too high temperature Page 14
What to do in the case of malfunction Page 15
General drawing of the Control- LED’s on the main PCB board, function overview Page 16
Cleaning Page 17
Technical data Page 18
Set up and installation of the optional phono board Page 19
!!! Please, read carefully this operating manual before you set up your Emitter and

Operating manual ASR Emitter I HD and II HD Page 2
ASR Audio Systems Friedrich Schäfer P.O. Box 1722, D- 35 727 Herborn +49 27 72 / 4 29 05
make yourself familiar with the qualities of the Emitter !!!
That will help you to use optimally the diverse possibilities of the ASR Emitter and to prevent
damages, that may result of inappropriate operation.
The operating concept of the Emitter
The Emitter can be operated in all functions with the three golden knobs and the monitor button. The use
of the remote controller is much more comfortable.
The display board of the Emitter which is located behind the front panel shows the current
operating state to you with the help of LED’s and illuminated letters.
On this display board, occurring troubles are immediately announced to you. Please consider
pages 14 and 15 of this operating manual if a trouble should occur and deal in accordance
with this operating manual.
The power units of the Emitter allows the operation in the so-called energy saving mode when the operating
voltage is sloped down. The switching point of the energy saving mode to the full power operation is
variable. However, the Emitter operates for the optimal care of the amplifier in the first minute after switch-
ON only in the energy saving mode.
After you have set up and wired your device according to instructions at a suitable place,
please turn the device into "Standby".
The LED’s for Standby, the level display as well as the LED’s for the selected input light up for 10 seconds.
Now you can switch ON the Emitter with the ON / OFF switch or the remote control.
Unpacking the Emitter
After opening the carton, you take out the devices. Loosen the adhesive strips cautiously (please
do not cut through) around the foam plastic foil and keep them for possible later use.
Then you may test the scope of delivery for completeness :
1. amplifier
2. programmable remote control
3. Power unit, 2 piece at the case of Emitter II. with 150 cm of power cables 3x 1,5 qmm
4. Repair lot Allen wrench 3 mm for case screw joints
Replacement screws
Replacement fuses
5. Care set Bottle of anti static plastic cleaner
Special cleaning cloth for cleaning of acrylic material
Do not turn ON the amplifier for approximately 2 hours after unpacking, in order to allow an approximation
to the room temperature. In the case of very cold and moistly weather, moisture would be able to have
suppressed itself in the device. This must dry up completely before switch ON.
The place of installation
At the place of installation the ASR Emitter should not be exposed to moisture, extremely high or low
temperatures. In such a way, set up the Emitter that the air can circulate freely to the cooling elements. The
waste heat resulting through the high quiescent current of the Class A/B- construction of the Emitter must be
able to flow off freely in order to avoid overheating.
The power units have only a small thermal development.

Operating manual ASR Emitter I HD and II HD Page 3
ASR Audio Systems Friedrich Schäfer P.O. Box 1722, D- 35 727 Herborn +49 27 72 / 4 29 05
The acoustic isolated installation of the Emitter
A well choose, acoustic isolated installation of the Emitter improves the tonal result very much. You can
use for example damping plates that are offered by many manufacturers.
You achieve an even better result if you derive the oscillations directly at the cooling element.
The Emitter II is furnished in series with spikes. Please unscrew the spikes so far and then lock them well till
the normal feet does not touch the ground.
With the Emitter I you can put big spike cones under the cooling fins.
For optimal linking, the pad for the spikes should be made out of a fixed, hard material.
You achieve this for example with a granite plate or the ceramic pads available with us.
Also at the power units a good isolated installation results in sound improvement.
A simple stacking of the individual power unit cases can damage sound clarity.
Therefore, please set up the cases individually and separately.
A damping plate with strings or spikes below every case can improve the sound again.
Of course you can also use a rack. Please, in this case pay attention however to a stable and
vibrating decoupled place. The distance between each case should be at least 10 cm.
The distance to the Emitter should be more than 20 cm.
The power connection of the Emitter
The ASR Emitter is equipped with separated power units in order to achieve best possible tonal results.
When the amplifier is switched OFF or is turned in position "Standby", only a small
auxiliary transformer with very small power consumption is working. Only after switch ON, the main
transformers are turned ON. Before the connection of the cable from the amplifier to the power unit, the
amplifier must be switched OFF. The connecting cable of the amplifier should be plugged in at first with the
plastic nose into the line plug at the back plate of the power unit case.
After this you can connect the Power unit with your power supply network!
If you want to separate the combination between amplifier and power unit, first switch OFF the Emitter.
After this, please wait until the complete expiration of all LED’s.
To unplug the cable from the socket connector at the power unit please bend away the clip at the connector.
If this connection between amplifier and power unit was separated by mistake once
before the LED’s had gone out, please wait before you plug in again at least two hours.
As a result, you avoid damages at the plug-in connector.
Three LED’s are positioned in the power unit in the middle of the power unit board:
The red LED lights up if only the standby transformer is supplied with voltage, in addition a
yellow LED lights up if the transformers are switched into the energy saving mode.
All three LED’s, therefore red, yellow and green light up when the main transformers work
in normal operation with full power.
Additional two yellow LED’s at the left and right on the power unit board light up while attaining the voltage
in the energy saving mode. After switching to full power, the correct full power voltage is shown by the light
up of two green LED’s.
Amplifiers of the power class of the Emitter with very extensive power units have a very high maximum
current consumption. Therefore please use, if possible, for the power supply of the Emitter an own wall
socket or a very high quality distributor socket.
A clean, undisturbed power supply is necessary for a good sound result.
You achieve the tonal best result if you use for the Emitter and for their other Audio devices in

Operating manual ASR Emitter I HD and II HD Page 4
ASR Audio Systems Friedrich Schäfer P.O. Box 1722, D- 35 727 Herborn +49 27 72 / 4 29 05
each case a separate, shielded power cable with at least 2,5 qmm per core to your fuse box place.
Please protect this connection with an 16 ampere slow blow fuse, installed in your fuse box.
The ground connection, the determination of the correct phase
Every further device which is connected to the Emitter inserts interference voltages via its network
connection into the Emitter. This can impair the tonal result.
We recommend you therefore to test the tonal effects after every new connection of a device and to measure
the correct phase position of the main power connection for best sound quality.
Please measure all devices separately. Connect an AC voltage meter for metering 250 Volt AC between the
net grounds and the Audio grounds (the RCA sockets) of the respective device.
The correct power plug polarity is the one with the smaller voltage rating.
In the case of the Emitter, the correct polarity is hardly to be defined exact by its specific
construction with shielded transformers. A voltage difference is hardly perceptible.
The use of the ground lift switch
At the power unit case of the Emitter you can find on the back side above the net input socket a
so-called ground lift switch (Ground lift Switch).
If in such a way this switch is in position "1", the power network ground is connected with the ground of the
Audio devices (the RCA sockets).
From safety reasons, the audio ground should be combined with the net ground in every
Audio equipment once. However, hum loops can result with multiple ground connections.
Put this switch to Position ”ON”, in case of all signal sources (CD, Tuner, Tape) connected to the Emitter
have only an two pole power plug. If one or several of these of the connected devices is equipped with a
three pin plug, please check whether the sound picture modifies itself while changing the grounding switch
and use in the case of doubt the ”ON” position.
The accumulator power unit (option)
You have the option to supply the input stage of the Emitter with a separate accumulator power unit. This is
the optimal solution and allows a smooth and extremely exact sound reproduction.
When you have set up your Emitter, please plug in the separate cable into the accumulator unit case and
connect it to the power supply network. After this please charge the accumulator some hours.
· When the Emitter is switched OFF, the accumulators are charged with low current.
· In position Standby the input stage is supplied for pre warm up from the charging transformer. This is
made for good sound immediately after switching ON the Emitter.
· After switching ON the amplifier is supplied out of the accumulators. The charging transformer is
separated from the power net. The voltage of the accumulators is checked during operation.

Operating manual ASR Emitter I HD and II HD Page 5
ASR Audio Systems Friedrich Schäfer P.O. Box 1722, D- 35 727 Herborn +49 27 72 / 4 29 05
· When the accumulators are empty, the charging transformer is switched ON again. Now the Emitter is
disconnected from the accumulators and supplied out of the charging unit.
· After complete charge the charging transformer is disconnected from the power net
and the Emitter is supplied again from the accumulators.
· The capacity of the accumulators is calculated so generously, that the Emitter can be
operated constantly for more than 100 hours from the accumulators.
Caused by the very high capacity of the accumulator unit also during charging the sound quality
is much better than the one of the standard type.
You can operate your Emitter also only with the standard power units. In this case the supply
voltage is switched by relays to the normal voltage supply. Please take of the 20 pole cable
from the Emitter out of the accumulator unit. You can do this also to make comparison
between the standard version and the accumulator supply unit.
Technical data Separate case for accumulator power supply of the input stage of the Emitter,
6 accumulators in each 6 Volt/ 10 Ah, buffering capacity 400.000 uF, fuse protection of the
charging transformer is 500 mA slow, of the accumulators slow 5 Ampere.
In position Standby, the Emitter is preheated with + 9 Volt. During charging the amplifier is
supplied from the charging circuit. In normal operation the accumulators are discharged and the
72 VA Philbert coat cut transformer is separated by relay in all connections from the power net.
The accumulator is switched with MOS-FET’s to the Emitter. When the voltage at the accumulators is lower
than 16,5 Volt, the unit switches into charging mode. If then during the charging process the voltage gets
higher than 20,1 Volt, the unit switches to normal operation.
These functions are controlled via an optical digital logic, that is free from electric fields.
Warm-up time of the Emitter
New amplifiers need a burn in time of approximately 100- 300 hours to achieve their
full sound quality. The Emitter is equipped with a very big amount of capacitors.
This capacitors need much time to reach full performance quality.
As a result, your Emitter may sound at the beginning less powerfully.
Best results will arrive if you play your Emitter with a small volume of 20-30 in the
energy saving mode with a high powered music or a burn-in CD.
Also when you don’t use your Emitter for a longer time like an vacation, the tonal quality
may decline a little. After some days of use this will be normal again.
As every other amplifier, the Emitter achieves its operating temperature approximately
1-2 hours after switching ON. This is the first precondition for a harmonious sound picture.
From our experience, it proves to be the best combination of device care, energy saving and sound quality, to
switch ON the Emitter approximately one hour before you would like to listen to music.
Please warm up the Emitter in the energy saving mode and switch him OFF only if don’t want to
listen to music for a longer time than 2 hours.
The connection of devices to the Emitter
In order to achieve best possible sound results we recommend you to use as short as possible cords especially
to phonographs. The Emitter should be set up therefore if possible near to the signal sources.
The Emitter is built up with completely separated channels. The RCA sockets on the right channel at the

Operating manual ASR Emitter I HD and II HD Page 6
ASR Audio Systems Friedrich Schäfer P.O. Box 1722, D- 35 727 Herborn +49 27 72 / 4 29 05
back panel are supplied with a red colour ring, the sockets of the left channel are marked with a black colour
ring.
We recommend you to connect the available devices with as highest quality as possible RCA cable and
plugs, in accordance with the legend on the reverse page.
The inputs of the Emitter are all technically the same and only distinguish itself through denotation.
Only the Tape input and the Phono input in case of the use of the plug-in phono board are different.
The connection of a phonograph to the optionally available phono board is described separately.
!! Important !! The Emitter is to be switched OFF generally in order to avoid harm to the
loudspeakers as soon as cable connections are positioned or changed.
Direct input (option)
At the Direct input one input socket is connected with solid silver wire directly with the relay stepped level
control. Also the ground wire of this input is led separately.
In order to achieve highest possible quality this direct input is used with Audio equipment in
which only one signal source is used. In this case, the use of the normal inputs with at least
2 relays in the signal path means an unnecessary degradation of the signal.
This input is not led via the input selector switch, therefore you can not switch OFF devices
connected to this input.
If you switch the input selector switch to an input where a device is connected, you will listen
to both signals.
Therefore, please switch to an unused input when you use the direct input.
But don’t use under no circumstances the perhaps available balanced CD input.
The connection of a tape deck to the Emitter
The connections to the recorder "LINE OUT" should be connected with the "TAPE" sockets on
the Emitter. The connections "REC IN" or "LINE IN" at the recorder should be combined with
the "TAPE OUT" sockets of the Emitter.
A second TAPE or DAT device can be plugged into another input, for example DAT.
However, the possibility of rear tape control of the tape deck is only available when you
connect the device to the TAPE sockets of the Emitter.
For recording please switch the input selector at the Emitter to the desired signal source.
The signal of this selected source is coming out at the two TAPE OUT sockets.
Through this also TAPE to TAPE recording is simply possible.
!! Important !! It is to be ensured without fail that one must never switch to the TAPE input belonging
to this tape deck during a recording or in the case of the tape deck is switched to recording ”Pause”.
In this case you connect the input of the tape to the output. The resulting high-frequency oscillation in
the tape deck may cause harm to your loudspeakers!

Operating manual ASR Emitter I HD and II HD Page 7
ASR Audio Systems Friedrich Schäfer P.O. Box 1722, D- 35 727 Herborn +49 27 72 / 4 29 05
To avoid this please switch ON Dip switch No. 5 positioned on the left side of the supplementary board. (see
also page 13 : Set up of the configuration).
In this case the monitor input is switched ON instead of the normal Tape input.
This avoids the feedback oscillations. But then you can’t make records from signal sources
which are connected to the tape input.
The connection of an auxiliary equipment to the Emitter
The Tape input can also be used for inserting an auxiliary equipment, as for example, an equaliser. Please
connect the sockets LINE OUT with the TAPE sockets at the Emitter. The sockets TAPE OUT at the Emitter
should be combined with the LINE IN sockets at the auxiliary equipment.
The auxiliary equipment is inserted into the signal path by pressing the monitor button.
The connection of loudspeakers to the Emitter
The Emitters are designed to drive loudspeakers with an impedance that should not be lower than
2 ohms in the range of 20 - 20.000 Hertz. To protect the Emitter, the DC resistance of the
connected loudspeakers is checked by the protection circuit.
This circuit is not installed at Emitters with direct output without output relays.
The DC resistance of the loudspeakers is announced with LED’s in 3 steps
- less than 6 ohms through a green LED
- less than 3 ohms through a yellow LED
- under 1,5 ohms a red LED lights up and switch-ON of the amplifier is blocked.
In the case of amplifiers with a second loudspeaker output (B) resistance values less as 1,5 ohms
are only announced by a red LED and switch ON of the amplifier is not allowed.
The loudspeaker cables are connected to the pole terminals on the back panel. The positive
terminals are wired to the red ones and the minus poles to the black pole terminals.
We recommend urgently to use pole shoes for the secure connection of the loudspeakers. The
connections should be secured as contact protection with heat shrinkable tube or insulating tape.
At devices with one loudspeaker output, the output relays A and B are connected for improvement of the
output impedance. Therefore, the outputs A+B light up in the display.
Before you connect the loudspeakers to the Emitter,
the following needs to be done without fail
- the Emitter have to be switched OFF
- the loudspeaker connecting cables are to be checked for short circuit
A short circuit is provable easily and is not included in our guarantee.
Headphones (option)
The headphone socket is installed on the front or back panel as required. The plug of the headphones can
remain in this socket. The headphones output is switched ON only when the ON-OFF switch is positioned to
the corresponding position or when this output is selected by the remote control. The switched headphones
output is announced by two illuminated letters on the display board and a green LED on the main PCB board
positioned at the right headphones relay.

Operating manual ASR Emitter I HD and II HD Page 8
ASR Audio Systems Friedrich Schäfer P.O. Box 1722, D- 35 727 Herborn +49 27 72 / 4 29 05
Second output (option)
That connection pole terminals for the second outputs are named with B.
The function is announced by lighting up a yellow LED at every of the two output relays
and by two illumination letters ”B” on the display board.
Direct output (option)
To achieve better sound quality the Direct Output is connected without relay direct at the output transistors.
But there are some differences to the behaviour of an Emitter with relay output:
· While switching ON and OFF, some small noises can occur.
· The impedance of the loudspeaker can’t be checked no more before switching ON to short
circuit, therefore please check the loudspeaker cables carefully before connecting.
· Since the loudspeaker output in the case of technical defects can be disconnected no more,
the protection circuit locks the output with a low impedance in the case of fault.
· During override of the amplifier, it is immediately disconnected completely from safety
reasons. Before switching ON again, the Emitter is to be put onto position ”OFF” first.
The Operation of the ASR - Emitter
ON- OFF switch (left rotary knob)
Off - The Emitter is switched OFF. A green LED on the main PCB board at the right front lights up
weakly and shows that the Emitter is correctly combined with the power unit. After a shutdown
of the Emitter, wait at least 30 seconds, before you turn ON again.
Standby - Two auxiliary supply voltages (+ 12 Volt) are switched ON in this position to supply the input
relays and the display. As a result, records with switched OFF amplifier are possible. This switch
position is the basic position for the remote control operation.
1 - First sensitiveness position. Control range of 01 to 61 dB. The amplifier should
normally be operated in this position.
2 - Second sensitiveness position. Control range of 01 to 76 dB. In this position the
level control can be adjusted 15 decibels higher and you have full power mode.
The second sensitiveness position should be turned ON only when the level in position 1 is not
sufficient. In both positions the adjustment of the relay stepped level control in the amplifier
is the same in case of the same volume display.
ON-OFF switch positions with optional equipment
If your Emitter is equipped with an second output or headphones, the ON-OFF switch has in total
8 instead of normally 4 positions. The front panel is engraved in accordance with the equipment.
Meaning of the A 1 Output A (standard), first sensitiveness position
engraving B 1 Second loudspeaker output, first sensitiveness position

Operating manual ASR Emitter I HD and II HD Page 9
ASR Audio Systems Friedrich Schäfer P.O. Box 1722, D- 35 727 Herborn +49 27 72 / 4 29 05
KH Headphones
A 2 Output A, second sensitiveness position
B 2 Second loudspeaker output, second sensitiveness position
A+B 1 Both loudspeaker outputs are switched ON at the first position.
Important ! When you use the remote controller, the position of the ON/OFF switch may not
agree with the selected output in actual fact. The chosen output is announced by the lighting of illuminated
letters on the display board up and LED’s on the main PCB board.
Input selector switch (right rotary knob)
The input selector switch is set to 6 positions in standard version. On the main PCB board,
LED’s in front of the corresponding input sockets and on the display board light up and shows which input
was selected.
Volume control (middle rotary knob)
The middle knob operates an rotary impulse generator. This rotary impulse generator is required
for the adjustment of the volume in normal operation and also for different adjusting.
It can be moved by more than 360 degrees without assault.
For a complete throughput of the entire volume range, several turns are necessary at the rotary
impulse generator. This allows you a very sensitive operation. The adjusted volume is shown in numbers
from 01 - 76 in the display.
To avoid extreme volumes after switch ON, the volume can be adjusted in the "Standby" position only to a
maximum of 49.
To achieve the best possible reproduction quality we recommend you to set the connected signal sources to
maximum output level and to control the desired volume at the Emitter.
Monitor switch
In ”Standby” mode the monitor switch is required for the switching to further adjusting modes.
In normal operation, the monitor switch turns ON the monitor relays. In this case you can
control the rear tape signal of an tape that is connected to ”Tape” sockets.
When the monitor relays are ON, a green illuminated letter ”Monitor” on the display board
and a green LED on the main PCB board lights up.
Remote control operation of the Emitter
You can operate the Emitter optionally at the device or by remote controller. If you want to operate the
Emitter with the remote control, please turn the left rotary knob to the position "Standby".
If you press a remote control key the change is shown in the display.
The knobs remain on the position adjusted before.
You can take the function of the remote control keys from the table on the following page.
The Emitter operates with RC5 standard code, which is used in Europe by Philips and Grundig.

Operating manual ASR Emitter I HD and II HD Page 10
ASR Audio Systems Friedrich Schäfer P.O. Box 1722, D- 35 727 Herborn +49 27 72 / 4 29 05
Programming the remote controller
The delivered remote controller is programmable and can operate up to 8 devices.
Towards the statement of the operating manual of the remote controller you are not allowed to
activate the press button "reset" inside the battery chamber of the remote controller.
We recommend you to exchange the batteries one by one. When the remote controller is
longer than 2 minutes without voltage the stored programs will be extinguished.
The remote controller is programmed with the operational signals for the Emitter in the position "AMP" of
the device selector.
!! Please, store other devices into the remote controller only on other selector positions !!
For programming please place the source remote controller with its front to the back of your programmable
remote controller and press the ”Learn” button there. After this you should
press the buttons that belong together till the Learn OK lamp lights up.