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Interconnect Cables
Signal input connection is made via the RCA input jack on the rear of the amplifier located next to the
output binding posts. The input interconnect cables from the output of the preamplifier can be any length
your installation requires. A shielded high quality interconnect cable is important to reduce chances for
hum or interference. Ask your Authorized Cary Audio Design audio dealer for advice.
WARNING!
Page 10 shows correct tube placement positions, and 300B tube bias settings. Page 11 shows
300B tube pin configuration. FAILURE TO INSTALL THE TUBES CORRECTLY WILL DAMAGE THE
UNIT. Watch the tube pins carefully on the 300B tube during installation as it is possible to
force the tube to plug in ‘wrong’ during installation. The 300B tube has no ‘safety key’ center
pin on the tube to prevent incorrect installation. It has two large pins and two slightly smaller
pins. Please look carefully at the tube pins and the tube socket holes to note the two different
size connections prior to installation. Incorrectly plugging in the 300B driver tube will possibly
damage the amplifier and is not covered by the manufacturer’s warranty.
OPERATION ________________________________________________________
Your new amplifier is ready for operation after the speaker cables, interconnect cables and the tubes have
been installed.
On-Off Power Switch
Push the AC toggle switch toward the rear, to the “ON” position. The 6SL7 input tubes, 6CA7 current
source, and the 300B driver tubes will light up in this setting.
Standby Toggle Switch
Push the toggle switch toward the rear of the unit to operate. The installed 845 output tubes will light up.
Break In Period
The tubes, capacitors and the output transformers take approximately 100 hours of music playing to fully
settle in for peak performance. Small imperfections in the tube surfaces will ‘boil off’ during the break in
period as well. The amplifier will sound good right out of the box but it will improve as break in occurs.
After the first couple of hours you will notice increased depth and tighter bass. This break in period is true
with most high performance audio amplifiers.
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