Classe Audio P-153 Bedienungsanleitung

P-153 ISSUE 1, APRIL ‘99

CLASSÉ AUDIO

P-153

POWER AMPLIFIER

P-153

OWNER'S MANUAL

P-153 ISSUE 1, APRIL ‘99

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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 (excluding moving

coil and moving magnet phono circuits). This means all amplifiers and all high level circuits of

the preamps are the same. The same circuit is 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 fine tuning and upgrading this circuit and

its application, thus reaching a very high level of understanding and musical achievement 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.

P-153 ISSUE 1, APRIL ‘99

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P-153

OWNER'S MANUAL

TABLE OF CONTENTS

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

GENERAL CONNECTIONS................................................................... 5

CONNECTIONS FOR REGULAR OR BALANCED INPUTS...….... 7

PROTECTION CIRCUIT......................................................................... 8

SPECIFICATIONS................................................................................... 12

P-153 ISSUE 1, APRIL ‘99

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UNPACKING & SET-UP

Your CLASSÉ P-153 power amplifier is packed in high density, semi-rigid foam placed in a

special cardboard box. To remove the unit, open and spread all the top flaps of the box and by its

sides, lift out the entire unit and put it on a large flat surface. Take it out of the plastic bag and

inspect the unit for any concealed damage. Apart from this owner's manual, please ensure the

following has also been included:

1) Detachable linecord

2) Allen key for top plate

Please report any damage or missing parts to your dealer as soon as possible.

Place the P-153 at or near its final set-up position, allowing 8 inches at the rear for tightening

the speaker output connectors. For optimum sonic performance, we recommend the optional CLASSÉ

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

The power transformer in the P-153 is located at the front-center of the unit. Ideally, a few

feet should separate this area from components which potentially could pick up hum. These include

preamplifiers, turntables, and interconnect cables. In terms of providing adequate airspace for

cooling, a good rule of thumb is to allow 6 inches above and 3 inches on each side of the unit.

Check the Serial Number sticker on the back of the unit for the correct operating voltage.

The P-153 has one AC line fuse, the rating of which should be as follows:

LINE VOLTAGE FUSE RATING

100 or 120 V.A.C. 6 AMP FAST BLOW 125 or 250 volts

220 or 240 V.A.C. 4 AMP FAST BLOW 250 volts

P-153 ISSUE 1, APRIL ‘99

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GENERAL CONNECTIONS

A.C. LINE

Insert the linecord into the A.C. receptacle on the rear of the unit. PLEASE MAKE SURE

YOU HAVE PREVIOUSLY HOOKED UP THE SPEAKERS AND PREAMPLIFIER TO

YOUR AMPLIFIER BEFORE CONNECTING THE AC POWER CORD TO THE

AMPLIFIER.

CAUTION: SAFETY INSTRUCTIONS

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.

STEREO

Input and output connectors are clearly marked on the back of the amplifier. Left/Right

connections are oriented from the front of the unit. Stereo output connections are marked above the

connectors. Switch stereo/mono switch to [UP] position. (Units preset at factory for STEREO.)

Use only high quality interconnect and loudspeaker cables, and make all connections tight. If

the input plugs are loose, remove them and pinch down the ground leaves slightly with pliers.

Observe correct phasing of the loudspeaker connections, and tighten.

P-153 ISSUE 1, APRIL ‘99

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MONO

Please read through the previous Stereo section for general notes on securing good

connections, and safety tips. If the unit has been previously used in stereo, make sure it is OFF, and

remove all connections, including the AC line cable. Make sure the STEREO/MONO switch is

switched to the MONO position [DOWN].

The MONO "Input" is the "left channel input", as marked. The unused right channel input is

automatically disconnected. MONO output connections are marked below the connectors.

Repeat the above MONO settings and connections on the second P-153 to be used for the

other channel.

Please remember that the negative output connection of a bridged amplifier is NOT a

ground. Do not use a "common ground" or switchbox set-up. Do not use with electronic crossovers

which have a common ground.

REMOTE CONTROL: (OPTIONAL)

With a simple connection from the Classé Remote Interface Module the remote jack at the

back of the amplifier, (see Figure 1) the power amplifier can be turned ON/OFF from a distance (or

from another room).

P-153 ISSUE 1, APRIL ‘99

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CONNECTIONS FOR REGULAR OR BALANCED INPUTS:

The CLASSÉ P-153 power amplifier is equipped with both regular and balanced inputs.

Either one may be used SEPARATELY BUT NOT SIMULTANEOUSLY. The balanced inputs must be

connected to a preamplifier which has balanced main outputs, and balanced interconnects with "XLR"

connectors are also required. Regardless of the amplifier inputs used, stereo or mono operation is

still possible on the P-153.

REGULAR INPUTS

Switch the REGULAR/BALANCED switch to the position marked "REGULAR" [UP]. (The

amplifier is factory set for regular use.) Connect the regular interconnects to the RCA input jacks on

the rear panels of the P-153. The balanced connectors are automatically disabled.

BALANCED INPUTS

Switch the REGULAR/BALANCED switch to the position marked "BALANCED" [DOWN]. A

balanced preamplifier and balanced interconnects are also required. For use with balanced

preamplifiers other than Classé, the wiring of the 3-pin XLR connectors must be matched to that of

the CLASSÉ P-153 which is wired as follows:

PIN 1: GROUND

PIN 2: POSITIVE (NON-INVERTED) SIGNAL

PIN 3: NEGATIVE (INVERTED) SIGNAL

If the pin configuration of the preamplifier differs from above, the balanced interconnects must be

modified to accommodate the different preamp. Having confirmed the correct connections,

plug the XLR connectors of the balanced interconnects into the locking XLR connectors on the rear

panel of the P-153. (To remove the connectors, press the tab above the connector.)

P-153 ISSUE 1, APRIL ‘99

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MONO OPERATION

As stated before, regular or balanced inputs can be used in stereo or mono. Connect a single

interconnect, either regular or balanced, to the left channel input of each amplifier. See the "Mono"

section above for complete details.

PROTECTION CIRCUIT

The Classé P-153 is equipped with rail fuses to protect the output drivers (GDB5, 5 amps

fast blow. fig.2, page 10). In the event that a short circuit or other problems would occur at the

output of the amplifier, one or more of these fuses may blow in an attempt to protect the amplifier. In

addition to the fuses, the unit has a circuit for the detection of unusual distortion characteristics

and/or DC content in the incoming audio signal. There is also an AC line fuse protecting the unit. It

is located at the back of the unit immediately to the right side of the AC receptacle (see fig.1, page

9).

If the protection circuit of the unit is triggered or any of the fuses has blown, the FRONT

PANEL POWER LED will go to BLINKING GREEN.

IF THE PROTECTION CIRCUIT HAS BEEN TRIGGERED, TURN THE P-153 OFF.

After the situation which triggered the protection circuit has been clearly identified and corrected,

attempt to re-start the unit. IF THE UNIT STILL GOES INTO PROTECTION MODE, OR IF IT

APPEARS THAT PROTECTION FUSES DID BLOW, CONTACT YOUR LOCAL DEALER.

DO NOT TRY TO CHANGE A BLOWN FUSE. REPLACING FUSES AND RE-STARTING

THE UNIT WITHOUT CHECKING FOR COMPONENT FAILURE COULD RESULT IN

FURTHER, SERIOUS DAMAGE TO VITAL COMPONENTS IN YOUR AMPLIFIER.

CONTACT YOUR LOCAL DEALER OR DISTRIBUTOR.

P-153 ISSUE 1, APRIL ‘99

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P-153 ISSUE 1, APRIL ‘99

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