Specifications - Monacor Accessories SLA-48 Bedienungsanleitung

4-Channel Level and Impedance
GB
Matching Amplifier
We wish you much pleasure with your new MONACOR
unit. Please read these operating instructions carefully
prior to operating the unit. Thus, you will be able to know
all functions of the unit, operating errors will be prevent-
ed, and yourself and the unit will be protected against
any damage caused by improper use. Please keep the
operating instructions for later use.
1 Applications
The SLA-48 is a 4-channel level and impedance match-
ing amplifier for universal audio applications. The unit
consists of four amplifiers by which four audio signals
1
can be attenuated down to / (-20 dB) or boosted up
10
to 10 fold (+20 dB) independent of each other. Thus, the
SLA-48 can be used as follows:
– As a level matching amplifier to match different levels
of audio units with DIN jacks and units with phono
jacks
– As an impedance matching amplifier to prevent hum
interference with long cable connections
– As a signal distributor with amplifier to distribute one
signal to several units
2 Safety Notes
The unit corresponds to the directive for electromagnetic
compatibility 89/336/EEC and to the low voltage direc-
tive 73/23/EEC.
WARNING The unit is supplied with hazardous
mains voltage (230 V~). Leave servic-
ing to skilled personnel only. Inexpert
handling may cause an electric shock
hazard.
The following items must be observed in any case:
The unit is suitable for indoor use only. Protect it
against dripping water and splash water, high air
humidity, and heat (admissible ambient temperature
range: 0 – 40 °C).
Do not place any vessels filled with liquid, e. g. drink-
ing glasses, on the unit.
Do not operate the unit or immediately disconnect the
plug from the mains socket
1. if there is visible damage to the unit or to the mains
cable,
2. if a defect might have occurred after the unit was
dropped or suffered a similar accident,
3. if malfunctions occur.
In any case the unit must be repaired by skilled per-
sonnel.
A damaged mains cable must be replaced by the
manufacturer or by authorized, skilled personnel only.
Never pull the mains cable to disconnect the mains
plug from the socket, always seize the plug!
For cleaning only use a dry, soft cloth, by no means
chemicals or water.
No guarantee claims for the unit and no liability for any
resulting personal damage or material damage will be
accepted if the unit is used for other purposes than
originally intended, if it is not correctly connected or
operated, or not repaired by skilled personnel.
Important for U.K. Customers!
The wires in this mains lead are coloured in accord-
ance with the following code:
blue = neutral
brown = live
As the colours of the wires in the mains lead of this
appliance may not correspond with the coloured
markings identifying the terminals in your plug, pro-
ceed as follows:
1. The wire which is coloured blue must be connected
to the terminal in the plug which is marked with the
letter N or coloured black.
2. The wire which is coloured brown must be con-
nected to the terminal which is marked with the let-
ter L or coloured red.
®
Copyright
SLA-48
If the unit is to be put out of operation defini-
tively, take it to a local recycling plant for a
disposal which is not harmful to the environ-
ment.
3 Connection and
Adjustment of the Amplification
1) Fig. 2 shows the pin configuration of the four amplifier
channels A to D. According to requirement connect
the audio units via a DIN audio cable to the SLA-48
or via the supplied DIN/phono adapters. Different
examples of connection are shown in chapter 4.
The assignments of the phono inline jacks to the
individual amplifier channels A to D and the corre-
sponding signals are indicated in the following fig-
ures. Do not mix up the connections, otherwise no
signal amplification or signal transfer will be possible.
If required, note down the corresponding colours of
the phono inline jacks.
A
B
D
C
Assignment of the phono inline jacks for the jack A/B IN, C/D OUT
A
B
D
C
Assignment of the phono inline jacks for the jack A/B OUT, C/D IN
2) Adjust the amplification or attenuation with the corre-
sponding controls.
For a signal attenuation adjust the controls be-
tween 0 dB and -20 dB and for a signal amplification
between 0 dB and +20 dB. Do not adjust the amplifi-
cation too high in order not to overload the following
units. This will lead to distortions.
3) After all units have been connected, put the mains
plug of the SLA-48 into a mains socket (230 V~/
50 Hz). As the power consumption is very low, the
mains plug need not be disconnected after every
use, only if the unit will not be used for a longer time.
4 Examples of Applications
4.1 Level matching in general
If a signal source (e. g. mixer) supplies an output level
which is too low to sufficiently drive a following unit (e. g.
amplifier), the SLA-48 is inserted for level matching. For
this purpose connect the output of the signal source (if
necessary, via the phono inline jacks A IN and B IN, see
fig. 2) to the jack "A/B IN, C/D OUT" and the input of the
following unit (if necessary, via the phono inline jacks
A OUT and B OUT) to the jack "A/B OUT, C/D IN".
Adjust the necessary amplification between 0 dB and
+20 dB with the controls PLAY L (A) and PLAY R (B).
4.2 Matching DIN connection to phono connection
Fig. 3 shows the connection of a signal source (e. g.
mixer, preamplifier) with DIN output to a unit with phono
input (e. g. amplifier). The channels A and B are used.
Adjust the necessary amplification between 0 dB and
+20 dB with the controls PLAY L (A) and PLAY R (B).
4.3 Matching phono connection to DIN connection
Fig. 4 shows the connection of a signal source (e. g.
mixer, preamplifier) with phono output to a unit with DIN
input (e. g. amplifier). The channels A and B are used.
Adjust the necessary attenuation between 0 dB and
-20 dB with the controls PLAY L (A) and PLAY R (B).
© by MONACOR INTERNATIONAL GmbH & Co. KG, Bremen, Germany. All rights reserved.
Best.-Nr. 21.0480
1st line = input of channel A (signal PLAY L)
2nd line = input of channel B (signal PLAY R)
The marking must
show upwards.
3rd line = output of channel D (signal REC. R)
4th line = output of channel C (signal REC. L)
1st line = output of channel A (signal PLAY L)
2nd line = output of channel B (signal PLAY R)
The marking must
show upwards.
3rd line = input of channel D (signal REC. R)
4th line = input of channel C (signal REC. L)
4.4 Matching a tape deck with phono connection
to an amplifier with DIN connection
Fig. 5 shows the connection of a tape deck with phono
jacks to an amplifier with DIN jack. For the tape repro-
duction adjust the necessary attenuation between 0 dB
and -20 dB with the controls PLAY L (A) and PLAY R (B).
For the recording adjust the necessary amplification be-
tween 0 dB and +20 dB with the controls REC. L (C) and
REC. R (D).
4.5 Matching a tape deck with DIN connection to
an amplifier with phono connection
Fig. 6 shows the connection of a tape deck with DIN jack
to an amplifier with phono jacks. For the tape reproduc-
tion adjust the necessary amplification between 0 dB
and +20 dB with the controls PLAY L (A) and PLAY R
(B). For the recording adjust the necessary attenuation
between 0 dB and -20 dB with the controls REC. L (C)
and REC. R (D).
4.6 Dubbing from a tape deck with DIN connection
to a tape deck with phono connection
Fig. 7 shows the connection for dubbing from a tape
deck with DIN connection to a tape deck with phono
connection. In any case observe the correct phono
connections as shown in fig. 7.
For recording control of tape deck 1 and/or tape
deck 2 an amplifier can be connected via branching pho-
no adapters (e. g. ACA-120 by MONACOR) [see fig. 7].
Adjust the necessary amplification between 0 dB and
+20 dB for the recording on tape 2 with the controls
PLAY L (A) and PLAY R (B) and the necessary attenua-
tion between 0 dB and -20 dB for the recording on
tape 1 with the controls REC. L (C) and REC. R (D).
4.7 Impedance matching
With signal sources of high impedance output and long
connection cable to the following unit, hum interference
may occur. To prevent this, connect the signal source
with a short cable to the jack "A/B IN, C/D OUT" (if
necessary, via the phono inline jacks A IN and B IN, see
fig, 2) and the long extension cable to the jack "A/B
OUT, C/D IN" (if necessary, via the phono inline jacks
A OUT and B OUT). Set the controls PLAY L (A) and
PLAY R (B) to 0 dB.
4.8 Signal distribution
Fig. 8 shows an example for a signal distribution. A mixer
or preamplifier drives two amplifiers. For this purpose
the inputs A and C as well as the inputs B and D of the
SLA-48 are connected in parallel via a Y cable each
(e. g. CBA-20 by MONACOR). In any case observe the
correct phono connections and the correct assignment
of the DIN/phono adapters as shown in fig. 8.
The level for amplifier 1 is adjusted with the controls
PLAY L (A) and PLAY R (B), the level for amplifier 2 with
the controls REC. L (C) and REC. R (D). Set the controls
to 0 dB. Only adjust other values if different amplifiers
are used or different volumes are necessary.

5 Specifications

Frequency range: . . . . . . . . . 10 – 50 000 Hz, ±0.5 dB
Input voltage:. . . . . . . . . . . . . 6 V max.
Output voltage: . . . . . . . . . . . 9 V max.
Input impedance:. . . . . . . . . . 100 kΩ
Output impedance: . . . . . . . . 1 kΩ
Amplification factor: . . . . . . . . 0,1– 10 (±20 dB)
continuously adjustable
THD: . . . . . . . . . . . . . . . . . . . < 0.03 %
Crosstalk attenuation: . . . . . . > 58 dB
S/N ratio:. . . . . . . . . . . . . . . . > 86 dB
Voltage supply: . . . . . . . . . . . 230 V~/50 Hz/2.5 VA
Admissible ambient
temperature range: . . . . . . . . 0 – 40 °C
Dimensions (W x H x D): . . . . 167 x 37 x 65 mm
Weight: . . . . . . . . . . . . . . . . . 410 g
Subject to technical change.
A-0428.99.04.06.2005
®