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Audiolab 8000A Owner's Manual.pdf

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Page 1: Audiolab 8000A Owner's Manual.pdf

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Page 2: Audiolab 8000A Owner's Manual.pdf

Please read this manual before using your new Audiolabamplifier.

Page 3: Audiolab 8000A Owner's Manual.pdf

IMPORTANTCheck the amplifier voltage setting. If the local mains supplymatches the voltage shown on the rear panel connect a suitablemains plug to the mains cable. DO NOT connect the amplifierto an incorrect mains supply, serious damage may result.

NOTE: For some markets the mains cable is already fitted witha mains plug which complies with local requirements.

The wires in the mains cable are coloured in accordance withthe following code:

GREEN AND YELLOW EARTHBLUE NEUTRALBROWN LIVE

AS THE COLOURS OF THE WIRES IN THE MAINS CABLEMAY NOT CORRESPOND WITH THE COLOURED MARK-INGS IDENTIFYING THE TERMINALS IN YOUR PLUGPROCEED AS FOLLOWS:

The wire which is coloured GREEN AND YELLOW must beconnected to the terminal in the plug which is marked by theletter E or the safety earth symbol '* or coloured GREEN orGREEN AND YELLOW.

The wire which is coloured BLUE must be connected to the ter-minal in the plug which is marked by the letter Nor colouredBLACK.

The wire which is coloured BROWN must be connected to the ter-minal in the plug which is marked by the letter L or coloured RED.

If the amplifier fuse is ever changed it must be replaced by afuse of the orrect type and rating. The fuse is a Smm x 20mmTime Lag (T) type. The correct rating is shown on the rearpanel.

The fus' is 10 ated in a slide-in carrier which also contains aspar fu . Th fuse carrier cannot be pulled out until themains onn lor is unplugged from the amplifier. When thecani ris op '11 d the first fuse you see is the spare one.

Do not on ne t the mains supply until all other connectionshay be n ninde.

Page 4: Audiolab 8000A Owner's Manual.pdf

INPUTThe INPUT F.I,E T R s ts the input you wish to listen to.When the PH N input is selected one of the light emittingdiodes (LEOs) b low the input selector shows which phonoinput is op roling, tting of the phono input is explained insection 3. p ration of the INPUT switch is independent of thesetting of th RE RD switch.

RECORDThe REC R EL· OR sets the signal which is fed to theTAPE OUT < nd VIDE OUT sockets. Operation is independentof the INPUT swil h. It is possible to record from one sourcewhile list nlng to a different one.

BASSRotate (.,.)to boost low frequencies. Rotate (-) to cut low fre-quenci s.

TONEIn the ON position the BASSand TREBLEcontrols are opera-tional. In the FLAT position the tone controls are not operationaland the amplifier has a perfectly "flat" frequency response.

TREBLERotate (+) to boost high frequencies. Rotate H to cut high fre-quencies.

BALANCERotates to adjust the relative levels of the left and right channels.Normally the balance control should be in its centre position.

VOLUMEAdjusts the sound output level. Always turn the VOLUMEdown before operating the POWER switch, and before selectinga new input signal.

SPEAKERSSwitches the speakers connected to the Switched Speaker termi-nals ON or OFF. The Direct Speaker outputs are not switched.HEADPHONESThe headphone socket accepts a standard Y. inch stereo jackplug. When headphones are connected both the Direct andSwitched Speakers are muted. Headphones should be un-plugged before switching the mains power on or off.POWERSwitches the mains POWER to the amplifier ON or OFF. WhenPOWER is ON one of the LEOs will be illuminated. Each timepower is switched ON there is a delay of about 8 seconds dur-ing which the speakers are muted. This delay is to allow thepower supply circuits to stabilize. Always switch the powerOFF before changing any connections.

Page 5: Audiolab 8000A Owner's Manual.pdf

3 : Rear Panel

SPEAKERSConnect the main loudspeakers to the DIRECT SPEAKER ter-minals. The +ve (red) and -ve (black) speaker connections mustbe wired to the corresponding amplifier output terminals. Forbest results use low resistance speaker cables. Secure the wirescarefully or use good quality 4mm plugs. If large diameterspeaker cables are used, for best results and reliable connec-tions, the wires should be terminated with 4mm plugs.

A second set of loudspeakers, e.g. kitchen or patio speakers,can be connected to the SWITCHED SPEAKER terminals.

Electrostatic headphone adaptors and loudspeaker switchingboxes can be connected to the speaker terminals if required.

The SOOOAmay be used with any commercially available Hi-Filoudspeaker systems.

In the event of short circuit loads, or fault conditions, a fullyelectronic system protects the amplifier and loudspeakers fromdamage. No internal fuses, which could degrade the soundquality are used.

PHONO CONNECTORSAll input and output cables should be terminated with goodquality phono plugs. Occasionally un-plug and re-fit the plugs.The wiping a tion helps to keep them clean and maintainsgood cl tri al onta t.

CABLEAlways us good quality low capacitance screened audiocabl .

POLARI !PJJASmTh 8000A I I Non-Inv rting design. This applies for all inputsand oul ul .

II TAPE DECK/AUDIO SECTION OFVIDE lU~ QIU 1mTAPE/VII E U'l' Illgnul goes to the tape deck input.TAp:/VIII\ IN! onn·clxltothetapedeckoutput.

TAPI~ OJ'YINGIf rc Oftl Ing Is In progr ss inti you are copying from tape 1,tap 2 Or' vlom do not S 'lllll' input selector to the same position

Page 6: Audiolab 8000A Owner's Manual.pdf

as the record selector, unexpected noise or distortion may occur.When tape copying is not in progress all settings may be used.

VIDEO, CD,TUNER,TAPE l,TAPE2These are line level inputs for audio connection of stereo TV orVCR, Tape deck, DAT, Tuner, CD, DA convertor etc.

PHONOMMFor MOVING MAGNET (MM) cartridges connect the tonearmsignal lead to PHONO MM. Set the RED button to MM. ThePHONO MM input is suitable for all Moving Magnet cartridgesand "High Output" Moving Coil cartridges.

PHONOMCFor MOVING COIL (MC) cartridges connect the tonearm signallead to PHONO Me. Set the RED button to Me. The PHONOMC input is suitable for any Moving Coil cartridge with an out-put in the range 0.1 to O.5mV (lOOflV= O.1mV).For "HighOutput" MC cartridges use the PHONO MM input.

GROUNDThe GROUND terminal is for connecting the turntable or tone-arm ground (earth) lead. Always follow the manufacturer'srecommendations regarding grounding. Incorrect groundingcan cause hum and poor sound quality.

PRE-AMP OUTThe PRE-AMP OUTPUT is driven by a low output impedanceline amplifier which will drive long cables without signaldegradation. The output may be used to drive external poweramplifiers (e.g. Audiolab 8000P). For normal use the pre-ampoutputs are internally connected to the power amplifier inputsso that no external connectors are required.

POWER AMP INNormally the power amp inputs are internally connected topre-amp outputs. A simple internal modification allows the preand power amp sections to be used independently.

Page 7: Audiolab 8000A Owner's Manual.pdf

The AUDIOLAB tone controls are specially designed to givesmall tonal adjustments without introducing distortion. If youfind a setting which gives more accurate reproduction use it.The settings will depend on the cartridge, speakers and pro-gramme material. The scale numbers against the controlsindicate the number of decibels of boost or cut available at theextremes of the audio band. Outside of the audio band theboost is curtailed so that no overload or distortion can occur.

To ensure proper ventilation of the amplifier leave a clear spaceof at least 25mm above the amplifier. NEVER OBSTRUCT THESLOTS IN THE TOP OR BOTIOM OF THE CASE. If the ampli-fier is played at high levels for long periods of time leave aspace of at least lOOmm above the case.

Do not place the amplifier too close to your turntable or sensi-tive equipment, the magnetic field radiated by the transformercould induce hum.

Do not place the amplifier too close to equipment with a pow-erful radiated magnetic field, this could induce hum.

Do not place the amplifier too close to room heating or wheredirect sunlight could heat up the case.

Some parts of the amplifier case will become warm duringoperation. This is quite normal, most of the heat is produced bythe power supply regulating circuits.

For optimum performance connect the Green and Yellow wirein the mains cable to Mains Earth via a three pole mains plug.

The signal from the tape outputs of the amplifier is not affectedby the Tone, l3alance, Volume, Input or Output settings.

The position of the amplifier volume control is NOT an indica-tion of power output to the speakers. Unless the input signal isvery low the volume control will never be set near maximum.

With a simple internal modification the pre-amplifier andpower amplifi r sections can be used independently.

In th v nt of short circuits, severe overload, or large ampli-tude sub-sani signals the speakers are automatically muted.They wi 11not op rate until the fault condition is cleared. If youattempt to driv the amplifier with a short circuit load themuting sysl m will" ycle" on and off at intervals of about4 sands. wit h th amplifier mains power off immediately ifa short ir ult is susp ted.

If you h v L ny qu 'ri s regarding use of your AUDIOLABamplifl r onsult YO\\[ d aler.

Page 8: Audiolab 8000A Owner's Manual.pdf

Servicing of Audiolab products should only be carried out byauthorised service agents. If service is required the amplifiershould be returned, correctly packaged, to your dealer or dis-tributor. In the U.K. amplifiers may be returned to CambridgeSystems Technology Ltd for service. A note should be enclosedgiving your name, address, telephone number and a briefdescription of the reason for return. It is advisable to retain theoriginal packaging and to use it whenever the amplifier istransported. Always quote the serial number of your amplifierwhen making any technical enquiry.

All Audiolab products are guaranteed against defects in com-ponents and materials for a period of 12 months from date ofpurchase. Within this period parts will be replaced free ofcharge provided that failure is not due to accident or negli-gence. Labour and carriage are not covered except by localagreement. The guarantee offered does not limit the consumer'sstatutory rights.

Please register ownership of your Audiolab amplifier by com-pleting and returning the guarantee card. This will help us todeal quickly with any queries regarding your amplifier.

7: SpecificationsCONTINUOUS AVERAGE POWER OUTPUTBoth channels driven (80hms) 20Hz to 20kHzMinimum 60watts (l8dBW) per channel.

TOTAL HARMONIC AND INTERMODULA TION (IHF 1M)DISTORTIONBoth channels driven, any power level to rated output, any fre-quency 20Hz to 20kHz (THO), any input level up to +30dB overrated sensitivity, any tone control setting. Less than 0.05%.

LOAD IMPEDANCE (SPEAKERS)DIRECT or SWITCHED 40hms to 160hms.DIRECT and SWITCHED 80hms to 160hms.

HEADPHONESOutput impedance 3300hms. Suitable for headphones 80hms to20000hms impedance.

INPUT SENSITIVITY AND IMPEDANCEPHONO MM 2.0mV/47K/85pF, PHONO MC1l0llV /1000hms/3.3nF, CD 100mV/20K, VIDEO 100mV /20K,TUNER 100mV/20K, TAPE 1100mV /20K, TAPE 2100mV/20K, POWER AMP 707mV /50K.

RECORD OUTPUTTAPE 1100mV, TAPE 2100mV, VIDEO 100mVOutput impedance 10000hms, 16000hms with phono source.

Page 9: Audiolab 8000A Owner's Manual.pdf

PRE-AMP OUTPUT707mV, Output impedance 600ohms. Maximum output greaterthan 7.76V RMS (+20dBm).

Normally the PRE-AMP OUTPUT is internally connected to thePOWER AMP INPUT.

PHONO OVERLOAD (lHF)PHONO MM 30dB reI5.0mV. Max.input (1kHz) 175mVPHONO MC 25dB reI O.5mV.Max.input (1kHz) 10mV.

SIGNAL TO NOISE (lHFA, reI OdBW)PHONO MM 78dB, PHONO MC 75dB, CD 80dB, VIDEO 80dBTUNER BOdB,TAPE 1 BOdB,TAPE 2 80dB, POWER AMP 90dB.

FREQUENCY RESPONSETone controls set FLAT.PHONO MM and PHONO MC (RIAA/IEq 20Hz to 20kHz ±O.5dB.CD, VIDEO, TUNER, TAPE 1, TAPE 2; 20Hz to 20kHz ±O.5dB,2Hz to 65kHz -3dB. POWER AMP; 20Hz to 20kHz ±O.3dB,<1Hz to 65kHz -3dB.

TONE CONTROL RANGEBASS ±6dB at 20Hz, TREBLE ±6dB at 20kHz.

CHANNEL BALANCEWithin IdB.

CHANNEL SEPARATIONBetter than 60dB at 1kHz any input.

POLARITY ["PHASE")Non-inverting for all inputs and outputs.

MUTINGOutput is automatically muted for 6 to 8 seconds after power isturned on. Output is muted instantly when power is turned off.A fully electronic system protects the amplifier and loudspeak-ers from short circuits, large amplitude sub-sonic signals andDC voltage.

POWER REQUIREMENTS50-60Hz lOOV,nov, 120V, 220V, 240V models available.Maximum power consumption 250VA

DIMENSIONS (W x H x D)Including feet, terminals and controls 445 x 74 x 335 mm.Excluding feet, terminals and controls 445 x 64 x 302 mm.

WEIGHTNET 7.6kg, SHIPPING 8.5kg.

Audiolab products are designed and manufactured byCambridge Systems Technology Ltd. We reserve the right toalter designs and specifications without notice.

Page 10: Audiolab 8000A Owner's Manual.pdf

CAMBRIDGE SYSTEMS TECHN L26 Roman Way Industriall':'lt l

Godmanchest rHuntingdon

Cambs -PE188LN