Cary Audio Design SLP 05 Owner's Manual page 5

cathode from the filament so any position of mounting is proper. It was horizontally mounted to keep the
power supply the same height as the preamplifier. The rectifier tube provides the high-voltage (B+) plate
voltage. Two separate filter chokes and a fully regulated shunt coupling capacitor ensure stable and
ripple-free voltage resulting in a very low noise and spacious sound stage.
The preamplifier has eight (8) 6SN7 dual triodes octal socket vacuum tubes. Four (4) of the 6SN7's act as
the true balanced main line section. Two (2) of the 6SN7's are operating in the front end ahead of the gain
stage as balanced plus/minus 180 degree input buffer stage. The remaining two (2) 6SN7's function as a
'Class A' push-pull zero feedback headphone amplifier. This headphone section amplifier has two on
board output transformers to transform the high impedance of the 6SN7's to low impedance for driving
the headphones.
There are two power switches to control the AC input voltage to the preamplifier. The large knob on the
power supply is the mains power switch. If one places the power supply in another location, the main
power switch is turned on. A blue LED in the knob indicates the power supply can be activated by the
preamplifier section. Turning the preamplifier power switch sends 12 volts DC to the power supply relay to
turn on the main power transformer that powers the tube rectification along with all other voltages
required to place the SLP 05 in operation. The two meters on the front of the power supply indicate the
B+ plate voltage (210 VDC) along with the plate current (60 ma.). You will always know at a glance if all is
OK with the operating conditions.
The SLP 05 is engineered and built to provide a lifetime of musical enjoyment with facilities and features
that ensure future compatibility and audiophile performance for many years to come. This preamplifier is
a future collector's item and deserves to be installed with the finest ancillary equipment available, such as
the CD 306 SACD player or the CAD 211 Anniversary Edition power amplifiers.
5