ASR Audio Systems Friedrich Schaefer, D- 35 745 Herborn +49 (27 72) 42 905
3.0
Adjusting the ASR Basis Exclusive
The ASR Basis can be perfectly adjusted to match the needs of your cartridge.
Before you do any adjustments inside the ASR Basis Exclusive
U
turn
U
the unit
U
OFF
U
.
a)
use the enclosed (silver) 3mm Allen wrench to remove the top plate of the main unit
(please mark the front- and backside of the top plate before removing it!)
b)
behind the
„Input“
sockets of each input there are
two 12 fold
DIP switches to exactly
adjust the ASR Basis Exclusive to your cartridges. Please find the drawing at page 10.
c)
the
input resistance
can be adjusted on Dip
No 1 to 10
at the
12 fold
DIP
switches named „Input Resistance“.
d)
The switching between
balanced
and
unbalanced
mode is done at the
right Dip No 12
.
e)
the
gain
can be adjusted on the
6fold
DIP switches named „
Gain Adjust
“
f)
the
low frequency cut Off
can be adjusted to 2 Hz (switch to „On“) or 20Hz
(switch to „Off“) on the
2 fold DIP
switches named
„Low“
and
“2 Hertz”
The DIP switches have
two different settings
: „On“ or „Off“; please be sure, that the
switches are set correctly (when set correctly, you will hear a slight „click“)
3.1
Choosing the input mode, switching in unbalanced mode
The Basis needs to be adjusted to the input mode based on different kind of connections you use.
Please read page “Connection the tone arm cable” for more info.
When you use unbalanced cable you have to switch the right Dip
No. 12
to
ON
.
Otherwise hum or popping noises may occur. This Dip switch is marked with
“Unbalanced”.
With balanced cable please switch the
No. 12 to Off
, otherwise you won’t get out
the full quality of the balanced connection.
!! Balanced Cable Dip No. 12 right OFF, unbalanced cable Dip No. 12 ON !!
3.2
Adjusting the input resistance in balanced mode
Adjustment of the
input resistance
( from 10 ohms to 20 kilo ohms ) can be easily made on the
switches No. 1-10 on the 2 pieces 12 fold DIP switches named
„Resistance Adjust“.
In
balanced mode
both the Dip switches marked with “
Unbalanced”
and “
Balanced”
No.
1 to 9
per input channel
must be adjusted
in the
same way
to get the same load resistance for
both the positive and negative input !
Please set the DIP switches
exactly
the
same
for the
right
and the
left
channel.
The chart at the
right half
between the two rows of Dip switches shows the resistance values for
balanced mode.
For example for 94 Ohms you have to switch Dip No. 3 at the left and the right Dip switch marked
with “
Unbalanced”
and “
Balanced”
to ON. For 2 k for example put both Dips No. 7 to ON.
High End Phono-Pre-Amplifier ASR Basis Exclusive version 2010 Page 6
