another is selected.
Invert: Inverts absolute phase of the
output signal.
Connections
Input Connectors: Remembers setting
for each input. The LS27 provides eight
pairs of BAL/SE input connectors: CD,
Tuner, Phono, Video, Aux 1, Aux 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
output 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 Power Jacks: The
+12V DC input/output jacks provide the
ability to remotely turn on and off other
linked components such as power
amplifiers having similar capabilities.
Installation Instructions
While the LS27 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, preferably on solid, non-metal
shelving.
2. Do not stack the preamp on top of a
power amplifier: not only could this
cause overheating, but hum may be
introduced into the preamp from the
proximity of the amplifier's power
transformer. Do not stack components
or other objects directly on top of the
LS27.
3. Do not place or operate your preamp
on a soft or irregular surface such as a
rug. This will prevent proper ventilation.
4. Do not operate your preamp without
the top and bottom covers installed.
These are required both for safety as
well as shielding from interference
(except in service operations by
qualified personnel).
Operating Procedure
Start Up
1. Secure all rear-panel connections
between LS27, power amplifier(s) and
input sources.
2. Plug three-prong power cord from rear
of chassis into grounded AC wall
outlet. The Power switch defaults to
‘off’ when the unit is plugged into a
power receptacle.
3. Press power switch (either remote or
front panel). ‘Mute’ will will flash in the
display window for approximately 50
seconds, then cease flashing and
remain in the display. Press ‘Mute’ to
initiate operation.
4. Select input source, then BAL or SE as
necessary.
Shut Down
1. Activate ‘Mute’ function.
2. Set Volume level to ‘0’.
3. Turn off power amplifier(s).
4. Press Power switch to ‘off ‘.
5. Turn off input sources.
Tape Recording Procedure
When using the LS27 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.
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