Classe Audio C-601 Manuale utente

CLASSÉ AUDIO

C-601

REMOTE CONTROL

BALANCED PREAMPLIFIER

C-601

OWNER'S MANUAL

CLASSÉ DESIGN PHILOSOPHY

1. REPEATED LISTENING DESIGN SESSIONS:

Fine tuning of sound by exchanging and mixing of parts (transistors, capacitors, wiring, PCB boards

etc.), and adjusting many specific operating voltages within proper engineering ranges, producing an

overall sonic recipe giving the most natural harmonic realism of music typical of instruments in a

live performance.

2. UPGRADABLE SINGLE CIRCUIT DESIGNS:

All Classé products (all preamps and all amps) share exactly the same circuit design philosophy

(excluding moving coil and moving magnet phono circuits). This means all amplifiers and all high

level circuits of the preamps benefit from the same design goals. Similar circuits are then tailored to

different power levels etc. Differences between less expensive models and more expensive models

are parts quality and compliment, power supply extravagance and the amount of filtering etc., as

well as features and packaging.

This means that for years Classé has been constantly sonically fine tuning and technically upgrading

this circuit design and its application, thus reaching a very high level of natural musical enjoyment,

as well as excellent reliability which benefits all models - least expensive, most expensive, preamps

and amplifiers alike.

3. EXTREME LONG LIFE IN REAL WORLD CONDITIONS:

Choosing the best attainable quality parts and materials combined with the advantages of the two

above-mentioned areas provides Classé owners with years of proven trouble free reliability and

musical enjoyment.

C-601

OWNER'S MANUAL

TABLE OF CONTENTS

UNPACKING & SET-UP....................................................... 4

A.C. LINE POWER................................................................. 5

INPUTS.................................................................................... 6

OUTPUTS ............................................................................... 8

FRONT PANEL CONTROLS................................................. 9

FEATURES AND SPECIFICATIONS .................................. 18

UNPACKING & SET-UP

Your new 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 the 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:

1) External power supply.

2) Detachable A.C. linecord.

3) Detachable D.C. power supply cable.

4) 5/64 in. Allen key for top cover

5) 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 fuse rating should be 2 AMP SLO-BLO.

A.C. LINE POWER

The preamplifier has no power switch. Its low power consumption and improved sonics from

always being ON led to the omission of an ON/OFF switch. In fact, while thoroughly musical shortly

after turn-on, the preamplifier will exhibit "sonic growth" for the first 300 hours of used.

For optimum sonic performance, you should consider use of the optional CLASSE

REFERENCE A.C. LINECORD. Consult your dealer regarding this accessory.

SAFETY FEATURE: The preamplifier is designed with an Auto-Muting Circuit which engages

and is indicated by two FLASHING RED ARROWS when the unit is first connected, or after an A.C.

power failure. After 45 seconds of stabilizing the preamplifier is automatically switched to "MUTE"

mode, after which all operating functions such as input etc. may then be selected.

CAUTION: "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 C-601. The following inputs are provided:

BAL 1, BAL 2, REG 1 (also used for Phono), REG 2, REG 3, REG 4, TAPE, and a SURROUND

sound loop. (see figure 3).

OPTIONAL INTERNAL PHONO FEATURE:

The REG 1 input jacks are to be used with the optional phono feature (see fig.6) The phono

ground screw is located between the REG 4 and TAPE IN jacks. The optional phono can accommodate

both magnetic and moving coil cartridges of various outputs. In the MC position, gain of the Moving

Coil stage is factory preset at 16dB which matches perfectly with most typical MC cartridges. With the

resistor kit included with the optional phono feature, the gain can also be adjusted to 20db, 25db, or

30db in order to optimize system gain, and lower noise while using other less typical MC cartridges.

(Note: The MC gain is in addition to the standard MM gain of 42dB). To change the MC gain, proceed

as follows:

1. Disconnect A.C. linecord from the wall outlet.

2. Remove top cover with Allen key supplied.

3. Locate R245 and R145 (see fig.6), which are the MC gain setting resistors for the LEFT and

RIGHT channel respectively. Remove the resistors and replace them with newly selected ones,

according to the following chart.

GAIN COLOR CODED RESISTOR (or) NUMERICAL RESISTOR

Standard: 16db (Brown, Brown, Black, Black) 1100 (110 ohms)

20db (Red, Black, Black, Black) 2000 (200 ohms)

25db (Orange, Grey, Orange, Black) 3830 (383 ohms)

30db (Violet, Blue, Grey, Black) 7680 (768 ohms)

4. Having completed the resistor changes, replace the top cover.

BALANCED, TAPE, AND REGULAR INPUTS

The BALANCED INPUTS are true differential high level inputs, wired as follows:

PIN 1: GROUND

PIN 2: POSITIVE (NON-INVERTED) SIGNAL

PIN 3: NEGATIVE (INVERTED) SIGNAL

The Balanced inputs may be used with CD players that have a balance output, or any other high

level, balanced source.

The TAPE IN of the C-601 should be connected to the LINE OUT or TAPE OUT of the tape

deck. (See FRONT PANEL CONTROLS: TAPE SWITCH.)

The Regular inputs may be used with any high level sources (REG 1 may also be used with the

optional Classé Internal Phono Feature.)

OUTPUTS

The C-601 has both regular (single-ended) and balanced outputs. Both are working at all times,

and may be used separately, or simultaneously.

TAPE OUTPUT

Whichever input is selected will be fed to the TAPE OUTPUT jacks. This should be connected

to the TAPE IN or LINE IN of the tape deck.

REGULAR OUTPUTS

Simply connect your regular interconnects to the RCA output jacks marked REGULAR OUT on

the back of the C-601.

BALANCED OUTPUTS

A balanced power amplifier and balanced interconnects are also required. For use with balanced

power amplifiers other than Classé, the wiring of the 3-pin XLR connectors must be wired as follows:

PIN 1: GROUND

PIN 2: POSITIVE (NON-INVERTED) SIGNAL

PIN 3: NEGATIVE (INVERTED) SIGNAL

If the pin configuration of the power amplifier differs from above, the balanced interconnects

must be modified to accommodate the different power amp.

Having confirmed the correct connections, plug the XLR connectors of the balanced

interconnects into the locking XLR connectors on the rear panel of the C-601 marked BALANCED

OUT. (To remove the connectors, press the tab above the connector.)

FRONT PANEL CONTROLS

NOTE: All functions may be activated directly on the front panel, or otherwise by the hand held remote

control.

DISPLAY:

Three (3) different display brightness levels can be selected (Full/Medium/Low as well as Off).

NOTE: With display set at the OFF position, activating any switches on the front panel or from the

remote control unit will temporarily turn the display to ON at full brightness. The display will

automatically turn back to OFF after approximately 10 seconds from the last change.

GAIN:

The dual gain feature provides the user to set the preamplifier either at REGULAR gain of 18db

or LOW gain of 12db. The red indicator "GAIN" appears in the display when LOW gain is selected.

PHASE:

Phase of the output signal can be switched between inverted (180 degrees phase shift) or normal

non-inverted (0 degree phase shift). The red indicator "PHASE" is shown when the unit is in the

inverted mode.

TAPE

The TAPE button selects the input signal, between the TAPE and SOURCE inputs, which goes

to the main REGULAR and BALANCED output jacks. The red indicator "TAPE" appears when Tape

input is selected. However, the SOURCE signal always appears at the TAPE OUT jacks and shown in

the display.

SURROUND

When the surround mode is engaged, the selected signal is directed to the SURROUND output

connectors where it is sent to a Surround Sound Processor for the decoding process. The Front-Left and

Front-Right output signals from the Surround sound processor are then fed to the Left and Right

Surround input connectors on the back of the preamplifier. The main outputs of the preamplifier (both

Balanced or Regular) are now to be connected to the amplifier powering the Front-left and Front-right

speakers of your surround sound system. (see figure 4)

All preamplifier functions (except input select, display, and mute) are disabled in the surround

mode.

SAFETY FEATURE: The volume control of the preamplifier is automatically brought back to the MIN

position, and MUTE is also engaged when the preamplifier is switched back from the surround mode to

the regular stereo mode.

VOLUME CONTROL

The preamplifier volume control has a total of 60 steps of level adjustments which varies the

level of both channels simultaneously. The volume can be operated from the remote using the hand held

control unit or manually turning the control knob at the preamplifier.

The volume will turn up or down ONE step at a time when the buttons are pressed intermittently.

When the buttons are pressed and held constantly the volume will change rapidly until the pressed

volume button is released.

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