Adjusting The Input Resistance In Unbalanced Mode - ASR Basis Exclusive Manual

ASR Audio Systems Friedrich Schaefer, D- 35 745 Herborn +49 (27 72) 42 905
With a higher input resistance the overall performance is brighter and has more dynamic,
but definition and precision are decreased.
Higher values than 500 ohms makes only small changes in the sound characteristic.
You can easily find out the perfect setting for you: make an adjustment and listen to the system.
! The best adjustment is the one you like best !
We don't recommend higher values than 9,4 K Ohms in balanced mode, cause
this may cause higher noise and maybe unstable operation of the input stage.
By using combinations of Dip switches you can get additionally values for the resistance.
Formula for the Calculation : 1/R total = 1/R1+ 1/R2+ 1/R3......
Example: 44 and 94 Ohm combined (47 k is fix): 1/Rt=1/44+1/94+1/47000 =1/0,033 = 30 Ohms
The result gives 30 Ohms when you switch Dip No 2 and 3 to ON at both Dip Switches.
3.3

Adjusting the input resistance in unbalanced mode

Adjustment of the input resistance (from 5 ohms to 47 kilo ohms) can be easily made on the
switches No. 1-10 on the 2 pieces 12 fold DIP switches named „Resistance Adjust".
MM Cartridges with 47 K load can only be used in unbalanced mode !
In unbalanced mode only the left Dip switches No 1 to 10 per input channel must be adjusted.
At the right Dip switch only the switch No. 12 has to be switched ON.
That shortens the negative input to ground.
The column at the left half between the two rows of Dip switches marked with "Unbalanced"
shows the resistance values for unbalanced mode.
For example for 100 Ohms you have to switch Dip No. 4 at the left and the right Dip switch 12
to ON. For 1 k for example put Dip No. 7 at the left and the right Dip switch 12 to ON.
High End Phono-Pre-Amplifier ASR Basis Exclusive version 2010
Adjustment for
1000 Ohms
unbalanced
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