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INTERCONNECT CABLES
The interconnect cables from the output jacks of the SLP-308 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. Your Authorized Cary Audio Design Dealer will
have proper interconnect cables in stock for this purpose. The low output impedance of
the SLP-308 will run long interconnect wire runs, as long as 30-40 ft., without a
problem. We suggest wires with good shielding if you live near transmitter towers for
TV or radio stations.
OPERATION
Your new SLP-308 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-308 is provided with functional, useful front panel controls
with an attractive and logical layout.
POWER SWITCH
The toggle power switch is located at the left side on the SLP-308 preamplifier front
panel. The switch operates in the following manner:
OFF (Down position) Removes all AC voltages from the SLP-308 power supply.
ON (Up position) 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-308 preamplifiers
continuously 24 hours a day. We recommend that the AC power
switch be left in the ON position at all times. The SLP-308 sounds
much better after 100 hour burn in and when warmed up for _ hour.
Operate LED This blue LED will light after the SLP-308 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 12AU7
tubes. The volume control has a DC motor attached for remote operation. The blue
LED in the volume knob is confirmation at a glance as to the overall level when you are
too far away to read the output level meters.