11
SAM-1C CONFIGURATION EXAMPLES
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2.3.8 4-channel differential amplifier :
This version allows connecting up to 4 balanced audio signal sources to unbalanced inputs. Four
independent amplifier channels are realized by using 2 differential amplifier modules SSIM-04Mc. The
gain of each output can be adjusted separately in the range of -20..0 dB, with jumper J1 and J3 also
gains up to 6 dB can be switched on.
Signal flow :
SAM-1C/
0-4
with 2 stereo differential amplifier modules SSIM-04Mc
2.3.9 2-channel matching amplifier fully balanced :
The SAM-1C is also available as a 2-channel fully balanced matching amplifier. In this configuration 2
balanced audio signals can be level corrected. In the input amplifiers a level reduction between 0...-21 dB
can be set. For each output a gain of 0...+23 dB can be adjusted independently via the spindle trimmers. A
short circuit at one output has no influence on other outputs.
In addition, an unbalanced signal can be taken from the RCA sockets. However, long cables should not be
connected here, as the capacity of the cables connected here can also have a slight influence on the
balanced outputs.
The following block diagram shows as an example a configuration 2x 1 on 1. The SSIM-04Mc module works
as a differential amplifier. The output signal of this amplifier is fed to both RCA sockets of the
corresponding channel and the input stages of the SSOM-04Mc module. The symmetry of the input signals
has no influence on the symmetry of the output signals and vice versa.
Fully balanced matching amplifier
SAM-1C/
2SVS2
with 1 each SSIM-04Mc and SSOM-04Mc
3
2
1
3
2
1
SYMMETRISCHE AUSGANGSSTUFE
EINGANGSSTUFE
XLR-MALE
CINCH
DÄMPFUNG VARIABEL
MASSE
MASSE
CHASSIS
MASSE
VERSTÄRKUNG VARIABEL
EINGANG
XLR-FEMALE
CINCH
SYMMETRISCHE EINGANGSSTUFE
BUFFERSTUFE
SYMMETRISCH
AUSGANG
SYMMETRISCH
MASSE CHASSIS
EINGANG
XLR-FEMALE
CINCH
SYMMETRISCHE EINGANGSSTUFE
BUFFERSTUFE
SYMMETRISCH
DÄMPFUNG VARIABEL
MASSE
MASSE
CHASSIS
EINGANG
XLR-FEMALE
CINCH
SYMMETRISCHE EINGANGSSTUFE
BUFFERSTUFE
SYMMETRISCH
DÄMPFUNG VARIABEL
MASSE
MASSE
CHASSIS