Audio Research Definition DSi200, Owner'S Manual, Page: 13 / 14

10 seconds at a low level by pressing any button
(except Power) on remote or control on front panel.
B A L L / B AL R : Adjusts balance left or right. Adjustment
appears in display window as movable marker on bar
graph. Useful for compensating for uneven speaker place-
ment or imbalanced output from a phono cartridge.
Tape Recording Procedure
When using the DSI200 as a control center for recording,
the program source to be recorded must be connected to
one of the six inputs controlled by the Input selector
switch or to the Processor input. This routes the selected
program to the Record output.
Note: If the Processor input is activated by selecting the
“Processor” switch position, all other inputs will be deacti-
vated. When recording from the Processor input to the
Record out of the DSI200, the level of the recording will be
dependent on the level setting of the processor.
If you own a three-head tape deck, and wish to monitor the
actual tape while making a recording (for a true “A-B” com-
parison of signals before and after recording), connect the
tape deck output to the Monitor input.
It is also possible to dub from one tape deck to another.
Simply connect the output from one tape deck to an un-
used set of inputs controlled by the Input selector (Tuner,
Phono, CD, etc.) on the DSI200. This signal will then
be routed to the second tape deck through the Record
output when the appropriate input is selected on the Input
selector.
H O U R S : When pressed, displays number of operating
hours vacuum tubes have been in service. WARNING: after
replacing tubes, this function should be reset to “0” only by
a qualified technician. Hours display can be reset to “0” by
pressing black button labeled “Reset Hours” located on
lower right corner of circuit board directly behind display
window. The preamp must be “On” to reset function–the
service technician must be careful to avoid any contact with
other circuit components during reset operation. Contact
Audio Research customer service (763-577-9700) for infor-
mation regarding this procedure.
GAIN: The Gain selector limits the input level to the
DSI200, with resulting Low, Medium and High labeled gain
option settings to the outputs. Note that the gain to the
single ended outputs at each of the three settings is half of
the gain to the balanced outputs at the same setting. The
gain options allow limiting the output of “h ot” high-gain
signal sources to the preamplifier's input circuitry and pre-
vents potential overloading. Properly used, this results in
extremely wide signal input range capability while preserv-
ing optimum use of the Volume control. For each input
source, simply set the Gain selector at the highest of the
three gain settings viewed on the display that allows you to
use the Volume control over the desired range without au-
d
i b l e
distortion on peak levels from your program source. Once
you have selected the optimum gain setting for a given
input, the DSI200 will “memorize” it and return to that gain
setting each time you select that input. Note that the Gain
selector defaults to the “High” setting for each input unless
another is selected.
I N V E R T : Inverts absolute phase of the output signal.
Remembers setting for each input.
INPUT CONNECTORS: The DSI200 provides eight pairs of
B AL/SE input connectors: C D , T u n e r , P h o n o , V i d e o , Aux 1,
A ux 2, Monitor and Processor. The BAL/SE selector
button (front panel and on remote) should be selected
to match the type of connection used (BAL or SE) on each
input.
Connect either the BAL or SE connectors for each input.
Never connect the BAL and SE connectors simultaneously
for any input.
OUTPUT CONNECTORS: Two pairs of BAL / SE main
outputs are provided.
RECORD OUTPUT: The BAL/SE tape outputs should be
connected to your recorder's “Record” or “Line” inputs.
These outputs provide a fixed-level two-channel signal
( R , L ) to your recorder from whichever input is selected.
The non-variable output level will be the same as the out-
put of the selected source.
It is possible to dub or copy from one recorder to another
by connecting the output of the source recorder to an
unused set of stereo inputs (Aux 1, Aux 2). The signal
will then be routed to the Record Out connectors when
that input source is selected.
12V IN/OUT REMOTE START JACKS: The +12V DC in-
put/output jacks provide the ability to remotely turn on and
off the preamp and other linked components such as power
amplifiers having similar capabilities.
Installation Instructions
While the DSI200 does not dissipate an unusual amount of
heat, it is important that it be provided with
reasonable airflow to assure long, trouble-free operation.
In addition, the following installation guidelines will help
insure maximum sonic performance as well as reliable
service:
1. Operate unit in upright and horizontal position, prefer-
ably on solid, non-metal shelving.
2. Do not stack the preamp on top of a power amplifier: not