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User's Manual

THE CARVER RECEIVER

THE CARVER RECEIVER

Powerful • Musical • Accurate

Redefines your expectations of receiverperformance with the power you need for DigitalAudio Discs plus virtually noise-free stereo FMreception. A receiver with astonishingperformance incorporating two highly significanttechnological break-throughs: Bob Carver'sMagnetic Field Power Amplifier and hisAsymmetrical Charge Coupled FM Detector.

Essential PowerYour system needs an abundance of power to

reproduce, without distortion, the dynamic rangeof music on Digital Audio Discs and fine analogrecordings.

The Magnetic Field Amplifier in the CARVERReceiver gives you 130 watts per channel* ofpure, clean power with superbly defined, highfidelity reproduction.

The Magnetic Field Amplifier produces largeamounts of power (absolutely necessary for theaccurate reproduction of music at realisticlistening levels) without the need for heavy heatsinks, massive transformers, and enormouspower capacitors required by conventionalamplifier design.

..-.,.~-----....•.....,,---- ..-

•..__., .•..-~-, ~·~"42__Conventional power amplifier Magnetic field amplifier

Solid line: audio output signal. Broken line: powersupply voltage. Shaded area: wasted power. Verticallines: power to speakers.

The Asymmetrical Charge Coupled FMDetector was first introduced in CARVER's TX-11Stereo Tuner, receiving unparalleled criticalacclaim:

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CARVER

THE CARVER RECEIVERUnlike conventional amplifiers which produce a

constant, high voltage level at all times,irrespective of the demands of the ever-changingaudio signal (even when there is no audio signal inthe circuit at all!), the Magnetic Field Amplifier'spower supply is signal responsive. Highly efficient,it produces exactly and only the power needed tocarry the signal with complete accuracy andfidelity.

The 130 watts-per-channel* CARVER Receiveris about the same size and weight of conventionalreceivers having merely 30 watts per channel!

Noise-Free ReceptionTh AM-FM CARVER Receiver gives you FM

stereo performance unmatched by that of anyother recever.

Reflected multi-pathsignals cause audibledistortion.

Asymmetrical ChargeCoupled FM Detectorgives your ears a truesonic image.

As it is transmitted from the station, the stereoFM signal is extremely vulnerable to distortion,noise, hiss and multipath interference.

However, when you engage CARVER'sAsymmetrical Charge Coupled FM Detectorcircuit, the stereo signal arrives at your earsvirtually noise-free. You hear fully separatedstereo with space, depth and ambience!

Powerful • Musical

'~ major advance . . . Its noise reduction forstereo reception ranged from appreciable totremendous. It makes the majority of stereo~ignals sound virtually as quiet as mono signals,yet it does not dilute the stereo effect. "

Julian D. Hirsch, STEREO REVIEW(December, 1982)

"Separation was still there; only the backgroundnoise has been diminished, and with it, much ofthe sibilance and hissy edginess so characteristicof multipath interference. "

Leonard Feldman, AUDIO(December, 1982)

"What distinguishes the TX-11 is its ability to pullclean, noise-free sound out of weak or multipathridden signals that would have you lunging for themono switch on any other tuner we know of. "

HIGH FIDELITY (January, 1983)

The CARVER Receiver has been designed forfidelity, accuracy and musicality .

*130 watts per channel RMS into 8 ohms, 20 Hz to20 kHz with no more than 0.05% total harmonicdistortion.

• Accurate

Your CARVER Receiver is the most powerful*, most sensitive**(Stereo FM), and lowest multipath distortion receiver that we know ofmade today. In addition, we have gone to great and heroic lengths tomake it the quietest and most musically accurate receiver ever!

Separate POWER switch - no need todisturb other controls. Built-in protectionrelay prevents damage from voltagepeaks during power-on cycle.

Power output meters130 watts / channel.

Controls forTONE DEFEAT, AM FILTER,MONO, FM MUTE.

ASYMMETRICAL DETECTOR for FMnoise and FM multipath reduction.

Meter Range

Digital frequency display with LED signalstrength indicators, FM stereo indicator,memory and Function, station lockedindicators.

Microprocessor controlled memoryallows instant selection of 6 AM and 6 FMstations.

PHONES jack for private listening. -I-_o oo o 0

LOUDNESS. Compensates frequencycontour for superb low level listening.

Selector determines OUT, A (Main) B(Remote) and A + B to select desired set-of-of speakers. L_....!=:;2===~==t:==-----.J-------~~

Select for MANUAL or AUTO Tuning,Easy-to-use calculator type "feathertouch" tuning automatically moves up anddown the FM band. Full manual tuning aswell.BASS, MIDRANGE, TREBLE (Center

detented) controls for precision resetting.Push button program source selectorfunction.

BALANCE control

Tape MONITORing and DUBBINGcontrols - copy tapes, make recordingswhile listening to another source or recordfrom any source in the system.

* 130 watts per channel minimum with no more than 0.05% THD from 20 Hz to 20 kHz.** 5.0 microvolts stereo, 50 dB quieting.

GETTING TO KNOW YOUR CARVER RECEIVER

Here's a quick overview of the versatile controls ofyour new receiver. Complete instructions forinstallation and operation will follow later in theManual.

POWERPush to turn the Receiver on. After about 5seconds, you'll hear a faint click as the speakerprotection relay closes and applies power to thespeakers. Press again to turn off.

SPEAKERS /

IThis is a rotary switch - rotate to connect the'desired pair of speakers. A is for "main" speakers. Bis for "remote" speakers. A + B is for both "main"and "remote" speakers. When using headphones,you'll probably want to set "OUT" position forprivate listening.

-----"'------'-------~

PHONES JackPlug in stereo headphones for private listening.Leave SPEAKERS switches in the "OUT" positionso you don't disturb others (this turns the Speakersoff).

Programmable MEMORYButtons (1-6)Use to set up to 12 of your favorite stations inmemory for immediate recall by pushing onebutton. (You can set 6 for FM and 6 for AM.)

Digital Display PanelIndicates receiving frequency and "AM" or "FM".

MEMORY SETPress to set the Receiver to accept the displayedfrequency into memory.

SIGNAL STRENGTHLED indicator shows the relative strength of AM orFM signal.

Auto TUNING DOWN/UPPress UP (or DOWN) key to scan to the next higher(or lower) frequency station (AM or FM).

FM Stereo IndicatorThis LED lights up if the MONO button is set forstereo (out) and you are tuned to a stereo FMsignal.

--~-----~

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POWER METER (LEFT &RIGHT)Indicates power available at the Left and Rightspeaker outputs. Meters are calibrated for use with8-ohm speakers. Normally the LED's glow red, butwhen the Receiver output is more than about 140watts, the two rightmost LEDs for each channel willglow yellow. Read low level scale with meter rangelow when operating Receiver at lower levels.

LOUDNESSWhen listening at low volume settings, press in theLOUDNESS button. This overcomes the humanear's reduced sensitivity at low listening levels bycompensating the low frequencies.

AM FILTERHelps to filter out noise. Press AM FILTER toremove hiss and scratch noise. Don't forget to turnit off when you return to the other functions.

MEMORY SET LEDShows the Receiver is ready to memorize a stationfrequency after you press MEMORY SET button.

TONE DEFEATThe same as putting the three tone controls in theflat position. Pressing this button removes theBASS, MIDRANGE, and TREBLE controls fromthe ci rcu it.

TUNINGSelects the Auto or Manual Tuning mode; press forthe desired mode.

FM MUTESource Selector FunctionPush-ButtonsDetermine the desired program source.Eliminates interstation noise when tuning for FM

stations. Receiver will then be silent until you tune astrong station. Press FM MUTE to receive weak FMstations. FM MUTE also works in Auto TUNINGmode.

AM:FM:PHONO:

Activates the AM tuner.Activates the FM tuner.Activates the PHONO 1 jacks on therear panel. The turntable connectedto these inputs must have a mag-netic phono cartridge.Activates the AUX jacks on the rearpanel. Connect any high-levelsource (tape deck, TV audio, hamradio, turntable equipped with aceramic or crystal phono cartridge,etc.).Activates the VIDEO/DAD jacks onrear panel.

MONOPRESSING THE MONO button defeats stereooperation, the resulting signal is a composite (Left+ Right).

AUX:

METER RANGEPressing METER RANGE expands the scale toshow low power levels.

VIDEO/DAD:

TAPE DUBBINGControls the tape dubbing (duplicating) functions.With switch in center (off) position, both sets ofTAPE OUT jacks will carry the same signals asdetermined by the Function switch. Use 1 • 2position to dub directly from TAPE 1 IN to TAPE 2

/ OUT, and 2.1 position to dub from TAPE 2 IN toTAPE 1 OUT.

TAPE MONITORLets you monitor signals connected to TAPE 1,TAPE 2, or the program SOURCE determined bythe FUNCTION Push-buttons. Switch must be incenter position if you wish to hear your Receiver'ssound (AM, FM, PHONO, etc.). To monitor signalsconnected to TAPE 1 IN, use position 1; formonitoring TAPE 2 IN, use position 2. This switchwill be of special benefit when used with a three-head tape deck (one with monitoring facilities).

VOLUMEAdjusts volume of sound from both channels.

BASS, MIDRANGE, TREBLEThese controls let you precisely adjust thefrequency response in three different ranges: lowfrequency, midrange (voice range), and highfrequency.

BALANCEAdjusts balance of sound between left and rightchannels. At the center position (you'll feel a slight"catch" there) sound will be equal from bothchannels.

(1) Phono GND ScrewConnect the ground lead (typically green or black)from the Turntable/Record Changer to this screw(to reduce or eliminate hum).

(2) PHONO Jacks ,Connect Turntable/Record Changer with magnetic /cartridge to these jacks. These jacks are activewhen PHONO Push-button is pressed.

(3) VIDEO/DADConnect a digital audio disc player or video audio tothese jacks.

REAR PANEL

(4) AUX JacksConnect output from any high-level source - athird Tape Deck, ceramic or crystal phonocartridge, etc. These jacks are activated when AUXpush-button Selector is pressed.

(7) TAPE OUT 1 JacksUse as following (10) for a second Tape Deck.

(8) TAPE IN 2 JacksConnect from Tape Deck's Output jacks for tapeplayback. To activate these jacks, TAPEMONITOR must be set to 2.(5) TAPE IN 1 Jacks

Use as following (8) for a second Tape Deck. Toactivate these jacks, TAPE MONITOR must be setto 1. (9) POLARIZED AC LINE

PLUGInsert into a polarized 120 volt AC/60 Hz outlet.(6) VENTED TOP COVER

Allow for air flow thru vents when installing unit.

(10) TAPE OUT 2 JacksConnect to the Tape Deck's Auxiliary Input forrecording anyone of the Receiver's programsources. The output from these and all TAPE jacksis unaffected by VOLUME, BALANCE,LOUDNESS or TONE CONTROLS.

(11) (12) PRE OUT/MAIN INJACKS

As supplied, there are jumper wires between thesejacks. If you want to operate a multi-channelsystem you can remove these jumpers and so useonly the power amp circuits. Or, install a FrequencyEqualizer system between the PRE OUT and MAININ jacks.

(13) A/B SPEAKERSTerminals

(14) SWITCHED ConvenienceAC OUTLET

Plug in an audio accessory which you want turnedon and off by front panel POWER switch. Forexample, connect a Tape Deck to this receptacle.Thus, when you turn the Receiver on and off, theTape Deck will automatically be turned on and off atthe same time. Power drawn from this receptacleshould not exceed 300 watts.

(15) UNSWITCHEDConvenience AC OUTLET

Can be used to power any audio accessory up to300 watts. The front panel POWER switch does notaffect this receptacle.

(16) AC CordSupplies the power. Plug the cord into any 120VAC, 60 Hz outlet. (220/240V AC, 50Hz forEuropean and 240V AC, 50 Hz for Australianmodel.)

(17) Power FUSEThis is the power supply fuse. It protects theReceiver from voltage surges or other abnormaloperating conditions. If the Digital Display or anLED Function Indicator does not go on whenPOWER is pressed, check the FUSE: if it is blown,replace with the same size and value.

(18) Built-in Ferrite AM AntennaIs adequate in most areas for AM reception. Movearound on its swivel for best reception.

(19) AM Antenna ScrewTerminals

/ Connect an external AM antenna here for longdistance AM reception. In most areas the built-inantenna will provide excellent reception. Theground terminal is optional, and may be used forextreme long distance reception.

(20) FM Antenna 300 OhmScrew Terminals

Connect the Dipole Antenna (provided), or connectexternal FM antenna here using standard 300 ohmlead-in.

(21) FM Antenna 75 OhmScrew terminals

Connect external antennas here using 75 ohmcoaxial lead-in. Coaxial cable provides extremelyhigh immunity for static and other noise.

Adding Your CARVER Receiver to Your System

Before making connections,be sure the POWER switch is "OFF" and the ACpower cord is not connected.

Note: To reduce hum, use shielded audio cable forall connections except speakers. For speakerconnections use lamp cord or speaker cable.

SpeakersYour CARVER Receiver output is designed for usewith 4 - 16 ohm speakers. If you plan to have both A(main) and B (remote) speakers, you should use 8or 16 ohm speakers to prevent overload.

Note: Be sure to observe proper wiring "polarity".Most speaker wire is clearly marked with a raisedline along one conductor, or has one wire a differentcolor from the other. Connect the (+) Receiveroutput to the (+) or "marked" (color dot or othermarking) Speaker terminal. Do not allow straystrands of wire to touch adjacent terminals or themetal chassis.

PhonographConnect the turntable leads to the PHONO input. Ifthe turntable has a ground wire (usually black orgreen) connect it to the PHONO GND screw. Plugthe turntable AC cord into the AC convenienceoutlet or wall socket.

AntennasYour receiver comes with an FM Dipole Antenna.For FM reception, connect it to 300-ohm antennaterminals on the rear. Tack it to the back of a recordcabinet or onto a wall - the higher the better. Forthe best FM reception, you should use an externalantenna.

Tape Oeck(s)Connect your Recorder's inputs (usually labeledAUX or LINE IN) to the Receiver'S TAPE OUT 1jacks. The Receiver's TAPE IN 1 jacks should beconnected to your Recorder's PRE AMP OUTPUTor LINE OUTPUT jacks. You can connect a secondRecorder's inputs to the Receiver's TAPE OUT 2jacks and the Recorder's output to the Receiver'sTAPE IN 2 jacks.

Before Plugging In YourCARVER Receiver

• Double-check all connections - especially theSpeaker connections - to assure that they are

all secure and that there are no shorts.• Set the Volume control to minimum (counter-

clockwise) position.• All push buttons should be out.

Now, connect the power cord to a source of ACpower and you are ready for fantastic sound!

AUXiliary EquipmentThe auxiliary inputs may be used with any highlevel source - a second tuner, TV audio, ceramicor crystal phono, an additional tape player orrecorder, short wave radio, etc.

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Using Your CARVER ReceiverPower OnPress POWER button to turn the Receiver on.Note: After about 5 seconds, you'll hear a faint clickas the protection relay closes. This pause beforethe output stages are activated protects yourspeakers and the Receiver's internal circuitry fromhigh-level switching pops and voltage peaks duringthe power-on cycle. The faint click is your reminderof this vital safety feature. If at any time duringoperation the protection relays are activated (by ashort across the speaker terminals for example),the Receiver will become silent. If this happens,check for improper connection or overheating.

Speakers/HeadphonesSet SPEAKERS Selector to A or B (or A + B). Forprivate listening, set SPEAKERS to OUT and pluga pair of headphones into PHONES.

Select the SourcePress the desired Selector push-button: AM, FM,PHONO, VIDEO/DAD, or AUX.

AM/FM ReceptionPress POWER ON. Press AM or FM push-button.

Auto TuningPress the AUTO TUNING button and press eitherUP or DOWN TUNING button. The Receiver willautomatically stop at the next station. To continueor make another choice, press either TUNINGbutton again. The locked LED will indicate perfecttuning. When you reach the highest frequency(1620 [or 1611] kHz AM, 107.9 [or 108.00] MHzFM) in UP TUNING mode, it will automatically startover. The Receiver will continue to scan the bandover and over again. The Auto TUNING will onlystop at strong signals on AM and FM. If you want totune weaker stations, you will have to tune

manually. Push the Manual Tuning button toManual position for manual tuning. You may haveto press FM MUTE for weaker FM stations. Youmay find weaker FM stations noisy. To improvequality, engage the Asymmetrical Detector. If thestations still sound noisy or distorted, push theNoise/Multipath button.

Manual TuningPress the Manual Tuning button. Press UP orDOWN button until you find the desired station. Ifyou press and hold the UP (DOWN) button for 3seconds or more, the Receiver will start a rapidscan (will not automatically stop on stations).

How to Set the MemoryA total of 12 frequencies can be set into theReceiver's Memory (six for FM, six for AM).

1. Press either AM or FM push-button.2. Tune to desired station (either Automatically or

Manually).3. Press the MEMORY SET button. The MEMORY

LED will be lit.4. Press MEMORY 1; the MEMORY LED will turn

off.5. Repeat steps 2 - 4 until all the stations you want

are set into the Memory.6. Select the other band (AM or FM) and repeat

as above for six more frequencies.

Want to change the stations you've stored inMemory? Simply add new stations as in steps 1 - 6and old ones are automatically erased.

Note: You may want to put a small stick-on labelnext to each MEMORY button to show the callletters of the stations set into Memory.

Memory ReceiveTo tune a frequency programmed into Memory, justpress the desired Memory button, 1 through 6. If

AM push-button is pressed, you'll receive the AMfrequency; if in the FM mode, you'll receive the FMfrequency.

Note: When the Receiver is unplugged, a built-in,Time Constant Circuit will keep the pre-set

./ frequencies in Memory for a few hours. If theReceiver is unplugged for more than a few hours,you'll have to re-enter stations into Memory.

Asymmetrical DetectorASYMMETRICAL DETECTOR

ENGAGE NOISE• •NOISE+

MULTIPATH

The ENGAGE button engages the circuit. Simplypush for quiet FM reception.

The NOISE button is a two position switch thatallows you to optimize the circuit for a particularreception problem. In the "OUT" position, the circuitwill reduce weak station noise. When the button ispushed to the "IN" (Multipath) position, the circuitwill reduce both weak station noise and multipathdistortion. Ordinarily, optimum performance isobtained when the button is positioned "OUT",except for those reception conditions wheremultipath distortion is present. Feel free toexperiment with either position and choose thebest.

Listening to RecordsPress PHONO push-button and adjust theVOLUME, BALANCE, BASS, MIDRANGE andTREBLE controls.

Note: For the best fidelity and longest record life,make sure the cartridge on your turntable isoperating within the recommended tracking force.Too light or too heavy tracking forces distortion andrecord wear.

Auxiliary SourcesYou can also connect high-level sources to yourReceiver for even more versatility and enjoyment.Typical auxiliary equipment would be: tape player,ceramic or crystal-cartridge turntable, TV audio, aUHF or VHF tuner, ham radio, etc. Connect suchsources to the rear panel AUX inputs and pressAUX push-button. You can also use VIDEO/DADINPUTS.

VOLUME and BALANCEIncrease or decrease the VOLUME control for apleasant listening level. You can monitor the poweravailable to the speakers by observing the twoPOWER METERS. If necessary, adjust BALANCEfor best stereo effect and channel balance, or tocompensate for slightly off-center listeningpositions.

Tone Control SettingsYour Receiver gives you unusually precise controlover the frequency response. You're probablyfamiliar with the use of bass and treble controls. Butthe MIDRANGE control may seem a little new toyou. MIDRANGE (sometimes called "presence")affects frequencies in the human voice range.When you're listening to a vocalist, try varying theMIDRANGE setting. You'll see that an increase inmidrange response moves the singer into thebackground of the ensemble. To increase bass,midrange or treble response, rotate the appropriatecontrol clockwise; to decrease, rotate controlcounterclockwise. In center position, controls areremoved from the circuit for a flat, unadjustedresponse.

Or, you can leave the controls set for your favoritesound compensation and just press TONEDEFEAT; this electronically sets the Tone controlsto the "flat" position (without disturbing themechanical settings).

For Low Listening LevelsPress LOUDNESS. This increases low frequenciesto overcome the human ear's lack of sensitivity atlow listening levels.

Tape FunctionsYour Receiver has two sets of Tape Input andOutput jacks on the rear, plus DUBBING andMONITOR switches on the front panel. This makesit easy to copy tapes, make dual recordings orrecord any program source without changing rearpanel connections.

RecordingSet the Function switch to the desired source -you can record any program source being playedthrough your receiver. Set TAPE DUBBING tocenter (off) position. Adjust Volume, Balance andtone controls for your preference - they will notaffect the output to your Recorder. If you have a 3-head tape deck, you can set TAPE MONITORswitch to 1 (or 2) to hear the recording immediatelyafter it passes the recording head.

When TAPE DUBBING and MONITOR switchesare set to their center (off) positions, the signal youare listening to (AM, FM, PHONO, etc.) will appearat both TAPE 1 and TAPE 2 OUT jacks. So, you canrecord via either or both jacks.

If you set TAPE MONITOR to other than OFF, it willinterrupt the "source" signal and connect theReceiver's input to the TAPE IN jacks selected bythe position on the TAPE MONITOR switch.

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To Duplicate (Dub) Tapes:Let's say you have Tape Deck "A" connected toTAPE 1 IN and OUT jacks. And you have TapeDeck "B" connected to TAPE 21N and OUT jacks.

Put Tape Deck "A" into Play function. SetDUBBING to 1 .2 and Record with Tape Deck "B".If Tape Deck "B" is a 3-head machine, you canmonitor its recording by setting TAPE MONITOR to2.

You can also record onto Tape Deck "A", whenTape Deck "B" is in the Play mode. Just setDUBBING to 2 • 1. Then, to monitor the recordingmade on Tape Deck "A" (assuming "A" is a 3-headmachine), set MONITOR to 1. As you use andexperiment with these jacks and front panelswitches, you'll soon begin to appreciate theunusual flexibility and versatility of these inputs andoutputs.

Dubbing While Listening toAnother Source:It's possible to dub tapes (from Tape 1 to Tape 2 orTape 2 to Tape 1) while you are listening to anothersource (AM, FM, PHONO, VIDEOIDAD, or AUX).This surprising feature is possible because theTAPE IN/OUT circuits are independent from therest of the circuitry under the following conditions:(a) TAPE MONITOR switch must be set to center

(off) postion.(b) TAPE DUBBING switch must be set to 1 .2 or

2 • 1 position, depending on which deck is inplayback mode and which is in record mode.

So now if you're doing a lot of dubbing and it getstedious, you're free to listen to whatever source youchoose.

PLAYBACKIf you have a Tape Deck connected to one of theTAPE IN jacks, you can set TAPE MON ITOR to thedesired position and, regardless of which inputsource you're using, you will hear the tape beingplayed.

Note: If you have set TAPE MONITOR to 1 or 2without a signal source being connected to TAPEIN 1 or TAPE IN 2, the Receiver's sound will cease.TAPE MONITOR (1 or 2) interrupts the signal flowthrough the Receiver and activates TAPE IN 1 orTAPE IN 2 for the input source. So if the Receiver is"dead", be sure MONITOR is not set to 1 or 2.

",

YOU HAVE PURCHASED AN ABSOLUTELYUNIQUE RECEIVER THATWILLALLOWYOU TORECEIVE NOISE-FREE AND MULTIPATH FREESTEREO FM RECEPTION FROM MANYSTATIONS THAT YOU HAVE PREVIOUSLYFOUND TO BE UN LISTENABLE.

The FM Stereo ProblemThe fundamental FM stereo problem is

simple:the broadcast system was designed over 30years ago before the advent of stereo. When stereocame along, two channels were forced to fit whereone channel went before, The result: a giant stepbackwards in terms of noise-free, distortion-freereception for all but nearly ideal and perfectreception conditions. Enterthe CARVER Receiver.

Your CARVER Receiver can drastically reducemulti path and distant station noise and still providefully separated stereo reception with space, depthand ambience. We're tempted to say, soundquality as it was intended over 30 years ago. Backthen, FM was a noise-free, wide-band alternative tostatic-filled AM. But it was in mono. Unfortunately,the stereo transmission system selected toaugment mono FM ended up degrading the ratio ofsignal to noise FIFTEEN TIMES! (More than 23dB.).

That's the system we live with today: hiss andoften multi path, distortion-filled unless you're in adirect line with a strong station.

Understanding FMStereo frequency modulation transmission is a

lot more complicated than you might think. Butunderstanding it will clarify both the problems andCARVER's solution,

(This happens with TV and AM, too. AM isn'taudibly affected, but you can see the frustratingresult on TV: a second, third and fourth image.)

These additional images are disastrous to FMreception because they reinforce and then removepart of the signal alternately. As the main signaldeviates in frequency, it beats with the reflectivesignal, causing constructive and destructiveinterference patterns which bear no resemblanceto the original signal. An engineer calls these"beats" phase and amplitude modulation.

While modern stereo FM receivers have mademuch of correcting the amplitude modulationcomponent of this interference, they have neveraddressed the truly audible distortion caused bythe phase modulation part.

Without waxing too technical, suffice it to say thatall other FM receivers are tricked into readingphase modulation as frequency modulation, whichis decoded and made into a brand new signal.

Thus instead of just degrading the existingsignal, multipath reception problems actuallyCAUSE NEW AUDIBLE SOUNDS. And we've allheard how bad these sounds sound.

Stereo FM, is not like a 2-track cassette withseparate signals next to each other. Rather, thereis a Left-Minus-Right and a Left-Plus-Right signal.A receiving circuit adds and subtracts sums anddifferences to get Left-only and Right-only signals.(AS you might have guessed, Left-Plus-Rightcomes in just fine on mono receivers because it ISmono.) It's that Left-Minus-Right signal that's toblame.

These signals are transmitted at different parts ofthe audio spectrum and unfortunately L - R isextremely prone to mishaps on the way to yourhome.

Audio GhostingTo get stereo FM perfectly, you'd have to be the

only house in the middle of a vast flat plain with noother buildings anywhere on the plain.

Because any protruding mass - hills,mountains, skyscrapers, other antennas, evenbridges -looms up to reflect signals while on theirway to your tuner.

Your CARVER Receiver eliminates thesedistortions whenever the ASYMMETRICALDETECTOR button is engaged. We recommendleaving the ENGAGE button "IN" all the time andthe NOISE button "OUT" for normal listening. Forsevere multipath reception problems, push theNOISE button "IN" to additionally activate themulti path reduction mode of the circuit.

Then you get TWO signals, one directly, and oneor more a fraction of a second later, after it's taken alonger angular path of bouncing off something.

SPECIFICATIONSPRE-AMPLIFIER & AMPLIFIERMinimum Audio Output Power at no more than O.OS%Total Harmonic Distortion into 8 ohms, over theaudio spectrum 20 - 20,000 Hz

Frequency Response (20 - 20,000 Hz)1MDistortionGain: PHONO

AMPLIFIERAUX, TUNER, VIDEO/DADTAPE IN 1,2

Tone Control Action BASS (100 Hz)TREBLE (10kHz)MID RANGE(1.SkHz)

AM Filter (10kHz)Signal-to-Noise RatioPHONOAUXandTAPE IN 1, 2

TAPE OUT 1, 2 LevelFMTUNERSensitivity (IHF)Sensitivity for SOdB Quieting Mono, StereoLimiting Sensitivity ( - 3 dB)Signal-to-Noise Ratio (1mV)Image RejectionIF RejectionCapture RatioHarmonic DistortionMonoStereo

AM SupressionStereo Separation (1 kHz)AM TUNERSensitivity Terminal

RadiatedDistortion (SmV/M)SelectivityImage RejectionIF RejectionAGC Figure of Merit

: 130 watts per channel(RMS power, bothchannels driven)FlatO.OS%3SdB26dB17dB17dB±8dB±8dB±6dB-1SdB

ANTENNASAM: Built-in ferrite loopstickFM: Dipole antennaPlus terminals for external antennas.POWER REQUIREMENTS120V AC, 60 Hz (S70 watts max.)

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

82dB90dB140mV

CARVER LIMITED WARRANTY

1.8 tJ-V: 3.1tJ-V,S.0tJ-V: 1.StJ-V: 74dB: 82dB: 80dB1.0dB

This equipment is warranted against defects for two years from date of purchase.Within this period, we will repair it without charge for parts and labor. Simply write to orcall Carver Corporation (Attention: Customer Service Department), P.O. Box 1237,19210 33rd Ave. W., Lynnwood, Washington 98036, 206-77S-1202. You will bedirected to an authorized Carver Corporation Service Station or receive instructions toship the unit to the factory. Please save the original shipping carton and packingmaterials in case shipping is required. Please do not ship by Parcel Post. Be sure youhave received authorization from Carver Corporation and include a completedescription of the problem, the associated components and connections, and a copy ofthe purchase receipt. Initial shipping costs are not paid by Carver Corporation; returnshipping costs will be prepaid if repairs were covered by the scope of this Warranty.Carver Corporation's liability is limited to the repair or replacement, at our option, of

any defective product and shall not, in any event, include property or any otherincidental or consequential damages which may result from the failure of this product.Some states do not allow limitations on how long an implied warranty lasts and/or do

not allow the exclusion or limitation of incidental or consequential damages, so theabove limitations or exclusions may not apply to you.This Warranty gives you specific legal rights, and you may also have other rights

which vary from state to state. We suggest that you attach your purchase receipt to thisWarranty and keep these in a safe place. Thank you for your choice of a CarverCorporation product.Notice: The preceding warranty information is exclusive to the United States. Please

see your local Carver dealer or distributor for the correct information for your area andlocale.

0.1S%: 0.2%: 80dB: 40dB20tJ-V2S0 tJ-V2S0 tJ-V/mfor 20 dB S N/N0.9%

I 42dB4SdB34dBSOdB

©1983 CARVER CORPORATIONPRINTED IN U.S.A.