English - Classe Audio CP-47.5 Owner's Manual

THANK YOU FROM EVERYONE AT
CLASSÉ
Thank you for purchasing the Classé CP-47.5
preamplifier.
We take great pride in offering components
that combine exceptional sonic performance and
long-term reliability. To do that, we have invested
in extraordinary design and manufacturing
facilities. We trust that you will enjoy your
purchase for many years to come.
CLASSÉ DESIGN PHILOSOPHY
All of our components benefit from the same
rigorous design goal: All Classé products must
reproduce music with the harmonic and spatial
integrity typical of fine instruments heard in a
live, unamplified performance.
Single Circuit Design
To this end, we make extensive use of
carefully optimized versions of the same basic
circuit precisely matched to specific power
requirements. This means that all Classé line level
components and power amplifiers benefit from
years of refinement. However, our efforts do not
stop here.
Listening: The Critical Design Element
Once we determine general circuit values
for a particular application, we listen carefully
while exchanging and mixing different parts
(transistors, capacitors, wiring, PC boards, etc.)
and adjusting specific operating voltages within
proper engineering ranges.
Extended Real-World Lifespan
Every Classé component, even the most
affordable, benefits from our painstaking
approach to design parameters. The result is an
optimum balance between the often-conflicting
demands of exceptional performance and long-
term reliability. Our most expensive components
gain from even tighter tolerance parts and highly
segmented and exceptionally robust power
supplies with large reserve-current capabilities.
Our Pride in Manufacturing, Your Pride
in Ownership.
We build all of our components to the highest
possible standards. From multi-layer glass-epoxy
circuit boards, the full sized power-supplies, and
the massive faceplates, every Classé product is
a tribute to both the science and art of sound
reproduction. We hope that you derive as much
pleasure and satisfaction in using your Classé as
we did in producing it.
UNPACKING & SET-UP
Your CLASSÉ CP-47.5 preamplifier has been
carefully wrapped in heavy gauge plastic, packed
in semi-rigid foam and contained in a special
box. To remove the unit, open and spread the
top flaps of the box. By its sides, lift out the
entire unit with foam pieces intact. Remove each
foam side by pulling straight out. Remove the
plastic wrap and inspect the unit for any
concealed damage. Apart from this owner's
manual, please ensure the following has also
been included:
• DETACHABLE LINECORD.
• REMOTE CONTROL UNIT
(Allen key and Batteries: AAA x 2 included).
Please report any damage or missing parts to
your dealer promptly.
This preamplifier, being capable of very high
gain, must be located in a position free of any
hum-inducing magnetic fields. (This also applies
to turntables and interconnect cables.) Positions
adjacent to power amplifiers, A.C line filters, or
regulation devices should be avoided. Ideally, a
few feet should separate the preamplifier from
the power amplifier. As well, keep low-level
interconnect cables away from the power amp
and separate from A.C. linecords.
Heat generated by the preamplifier is negligible.
Air space around the unit need not be a concern.
Check the Serial Number sticker on the back
of the unit for the correct operating voltage.
Regardless of voltage, the internal fuse rating
should be 2 AMP SLO-BLO.
A.C. LINE POWER
The Classé CP-47.5 preamplifier has a POWER
SWITCH located at the back of the unit directly
to the right of the AC cord receptacle, this
permits you to turn on (see SAFETY FEATURE
below) or shut down the unit completely. The
Classé CP-47.5 also has a STANDBY BUTTON
located on the left side of the front panel which
permits you to partially shut down the unit while
keeping warmed up parts of the circuitry .In fact,
while thoroughly musical shortly after turn-on,
the preamplifier will exhibit "sonic growth"
during its first 300 hours of use.
For optimum sonic performance, you should
consider the use of the optional CLASSÉ
REFERENCE A.C. LINECORD. Consult your
dealer regarding this accessory.
Safety Feature
The CP-47.5 preamplifier is designed with an
auto-muting circuit which engages during the
initial 7 seconds count down and is indicated by
the flashing GREEN STANDBY LED when the unit
is first powered up, or after an AC power failure
if the power switch was on. After the 7 seconds
countdown, the STANDBY LED to the left of the
front panel will be GREEN thus showing that
the unit is in STANDBY mode. This feature will
prevent any turn-on surges or unstable output
from reaching the power amplifier and possibly
the loudspeakers. Similarly, make sure the
STANDBY is ON (SHOWING GREEN) and then
turn the POWER SWITCH OFF when removing
A.C. line power.
CAUTION: Disconnect AC line cable while
making all connections. "Floating the ground",
or defeating the ground on a 3-prong linecord
may create a shock hazard. Connect all
interconnect cables between the electronics
before connecting the A.C linecords to the wall
outlets. This will reduce the potential shock
hazard. See also the warranty section of this
owner's manual.
INPUTS
The input jacks are clearly marked on the back of
the CP-47.5. The following inputs are provided:
LINE 1, LINE 2, LINE 3, LINE 4, BAL 1, BAL 2 and
TAPE (see fig. 3).
LINE LEVEL INPUTS LINE 1, LINE 2, LINE 3 , and
LINE4: These are all high level inputs sharing
exactly the same characteristics, and may be
interchanged if so desired. A tape machine
should only be connected to the TAPE input. See
TAPE IN and TAPE OUT below. The LINE 1 input
could also be fitted with an OPTIONAL PHONO
BOARD plug in module installed in the unit,
when this is the case, LINE 1 input will show LP
on the front panel display. A ground screw is
provided adjacent to the LINE 1 input jack.
Installation of the Phono Board
• Disconnect the A.C. line cord from the
wall outlet.
• Remove the top cover with the supplied
Allen key.
• Locate and replace the two mounting screws
(see Fig.5) with the supplied stand-offs.
• Remove jumpers J5, J6, J13 and J14
(see fig. 5). Check if extension sockets are in
place on the reverse side of the phono board.
• Install and secure the phono board using
the screws removed previously in step 3
(see fig. 6), make sure all the connectors
are properly aligned.
• Set MM/MC jumpers J104, 105, 106, 204, 205,
206, to the desired position. All six of these
jumpers are located at the far right of the
phono board (see fig. 6). Please note that for
ALL HIGH OUTPUT MC cartridges, the jumpers
have to be SET AT MM.
• Replace the top cover.
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