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Cary Audio Design SLP-88 Preamplifier Operations Manual
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INTERCONNECT CABLES
The interconnect cables from the output jacks of the SLP-88 to the input jacks on the
power amplifier can be any convenient length your set up requires. The choice of a high
quality interconnect cable is important. Most audio dealers will have proper
interconnect cables in stock for this purpose. The low output impedance of the SLP-88
will run long interconnect wire runs without a problem.
OPERATION
Your new SLP-88 preamplifier is ready for operation after the various interconnect
cables have been installed and the unit is plugged into the household AC mains 120 Volt
AC wall socket. The SLP-88 is provided with functional, useful front panel controls with
a logical layout.
POWER SWITCH
The power switch is located at the lower left corner on the SLP-88 preamplifier front
panel. The switch operates in the following manner:
OFF Removes all AC voltages from the SLP-88 power supply.
ON Turns on the AC voltage to the power transformer primary
on. The power transformer has a 200% duty cycle. In simple terms,
the transformer is capable of operating two (2) SLP-88 preamplifiers
continuously 24 hour a day. We recommend that the AC power
switch be left in the ON position at all times. The SLP-88 sounds
much better after being warmed up for at least 24 hours.
Operate LED This blue LED will light after the SLP-88 is warmed up and
biased properly.
VOLUME CONTROL
The gain of both left and right channels is controlled simultaneously by this control. The
control potentiometer is of such high quality that the tracking error is less than 0.5 dB
from 0 to -60 dB. The program source remains in balance over the entire range of this
control. The taper rate of the volume control has been chosen to provide a rapid
increase in gain over the first half of rotation and slower gain increase above 12:00
position. The volume pot is controlling the input signal to the first grids of the 6SN7
tubes. The volume control has a DC motor attached for remote operation.