Cary Audio Design SLP 05 Owner's Manual page 8

Front Panel – Preamplifier
1. Power (blue) LED: The blue power LED will light to indicate that the 12 VDC voltage is applied to the
input and output selector PC boards. The PC boards control the operation of the SLP 05.
2. Ready (red) LED: Indicates that the SLP 05 preamplifier has gone through the initial bias timing delay
and is now ready to operate. Generally this action will take about 60 to 90 second to complete after
initial turn on.
3. Power Switch: This switch controls the main power relay control system in the external power supply.
Turning it to the ON position will power up the 5AR4 rectifier tube in the external power supply
along with providing the DC filament voltage for the eight (8) 6SN7 vacuum tubes on the SLP 05.
You will notice this switch also lights the front panel meters on the power supply.
4. Selector: The selector switch controls the input, gold plated relays that route the appropriate rear
panel inputs to the volume control.
5. Operate/Mute: This bat handle switch will either mute the output of the SLP 05 or allow the signal to
flow to the basic power amplifier in the system. In the MUTE position the external hand held remote
unit will take over the mute/operate function. In other words, the default position for remote hand
set operation is in the mute mode. If set to Operate, it cancels the MUTE function in the remote
handset.
6. Tape/Monitor: In the UP position this bat handle switch will activate the input jack on the rear panel
labeled tape-in. This may be used for a tape recorder or for any other line level input.
7. On/Headphone: Setting in the UP position will engage the headphone amplifier in the SLP 05. You
should turn off your power amplifier when listening to the headphone section. Headphones in the
30 to 300 ohm impedance range will work well with the transformer coupled headphone section.
8. Preamp/Cinema: This toggle switch will provide a complete pass through of the Cinema inputs on
the rear panel to the power amplifier or amplifiers hooked to the SLP 05. The down position creates
this pass through. In the up position, the SLP 05 signals are active to the matching power amplifiers.
(Please note: with the power turned off, the default will be Cinema by-pass).
9. Listening Level: The large knob with the blue LED will control the input level to the preamplifier input
section. This controls the output level of the SLP 05 to the basic amplifier or amplifiers attached to
the SLP 05. This control is a motorized analog potentiometer. Depending on the input sensitivity of
the mating power amplifiers this listening level control may be used in any position. Do not be
concerned if, for instance, you have the control up at say, 3:00 o'clock or even all the way up. This
does not stress the SLP 05 in any fashion. The SLP 05 is a Class A operating circuit and in reality is
running at full potential at all times. The listening level control simply controls the input voltage level
flow.
10. Input Level: These two individual controls are used for individual left and right channel balancing. In
the full clockwise position these controls are basically out of the circuit and allow full input levels to
flow to the listening level (volume) control potentiometer.
11. Headphones: Use dynamic 30-300 ohm headphones.
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