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User's Manual

Safety Instructions1. Read Instructions -– All the safety andoperation instructions should be read beforethe Sunfire Component is operated.

2. Retain Instructions — The safety andoperating instructions should be kept forfuture reference.

3. Heed Warnings — All warnings on theComponent and in these operating instruc-tions should be followed.

4. Follow Instructions — All operating andother instructions should be followed.

5. Water and Moisture — The Componentshould not be used near water - for example,near a bathtub, washbowl, kitchen sink,laundry tub, in a wet basement, or near aswimming pool, etc.

6. Ventilation — The Component should besituated so that its location or position doesnot interfere with its proper ventilation. Forexample, the Component should not besituated on a bed, sofa, rug, or similar surfacethat may block any ventilation openings; orplaced in a built-in installation such as abookcase or cabinet that may impede the flowof air through ventilation openings.

7. Heat — The Component should be situatedaway from heat sources such as radiators, orother devices which produce heat.

8. Power Sources — The Component shouldbe connected to a power supply only of the typedescribed in these operation instructions or asmarked on the Component.

9. Power Cord Protection — Power-supplycords should be routed so that they are not likelyto be walked upon or pinched by items placedupon or against them, paying particular attentionto cords at plugs, convenience receptacles, andthe point where they exit the Component.

10. Cleaning — The Component should becleaned only as recommended in this manual.

11. Non-use Periods—The power cord of theComponent should be unplugged from theoutlet when unused for a long period of time.

12. Object and Liquid Entry — Care shouldbe taken so that objects do not fall into andliquids are not spilled into the inside of theComponent.

13. Damage Requiring Service — TheComponent should be serviced only by qualifiedservice personnel when:

A. The power-supply cord or the plug has beendamaged; or

B. Objects have fallen, or liquid has spilledinto the Component; or

C. The Component has been exposed to rain;or

D. The Component does not appear tooperate normally or exhibits a marked changein performance; or

E. The Component has been dropped, or itscabinet damaged.

14. Servicing — The user should not attemptto service the Component beyond thosemeans described in this operating manual. Allother servicing should be referred to qualifiedservice personnel.

Safety Instructions

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User's Manual

15. To prevent electric shock, do not use thispolarized plug with an extension cord, recep-tacle or other outlet unless the blades can befully inserted to prevent blade exposure.

Pour préevenir les chocs électriques ne pasutiliser cette fiche polariseé avec unprolongateur, un prise de courant ou une autresortie de courant, sauf si les lames peuvent êtreinsérées à fond sans laisser aucune pariie àdécouvert.

16. Grounding or Polarization — Precautionsshould be taken so that the grounding orpolarization means of the Component is notdefeated.

This apparatus does not exceed the Class A/Class B (whichever is applicable) limits for radionoise emissions from digital apparatus as setout in the radio interference regulations of theCanadian Department of Communications.

ATTENTION — Le présent appareilnumérique n'émet pas de bruitsradioélectriques dépassant las limitesapplicables aux appareils numériques declass A/de class B (selon le cas) prescritesdans le règlement sur le brouillageradioélectrique édicté par les ministere descommunications du Canada.

WARNING – TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.

CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADEOF PLUG TO WIDE SLOT, FULLY INSERT.

ATTENTION: POUR ÉVITER LES CHOCS ÉLECTRIQUES, INTRO-DUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE

CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU’AU FOND.

Safety Instructions and Contents

Introduction ........................................................................ 4Unpacking .......................................................................... 5Specifications ..................................................................... 5Installation .......................................................................... 6Front panel features ........................................................... 7Rear panel features ........................................................... 8System configurations...................................................... 10

Unbalanced RCA.......................................................... 10Balanced XLR .............................................................. 11Biamping ...................................................................... 12Biwiring ......................................................................... 14

Speaker connections ....................................................... 16Troubleshooting guide...................................................... 17Limited Warranty .............................................................. 19Service assistance ........................................................... 19

Contents

To find out more about this and other Sunfire products, please visit our website:

www.sunfire.com

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User's Manual

Introduction

Bob Carver, Amplifier Designer, Physicist

Introduction

Dear Friend:

Thank you for purchasing my Sunfire Cinema Grand Signature Edition five channel poweramplifier. I hope you enjoy it and the music it makes as much as I have enjoyed creating it for you.

This magnificent amplifier represents my very latest thinking - and my best amplifier designever I’ve spent over twenty years developing it, and cannot imagine how I could make it any better,or refine it any further. No matter what, its performance is at first, somewhat difficult to believe.

The Cinema Grand Signature can produce 425 watts rms per channel into 8 ohms, and850 watts rms per channel into 4 ohms.

The big breakthrough feature of the Cinema Grand Signature is its uncanny trackingdownconverter, which uses 18 Herculean Mosfets.

The circuit boards are heavy glass epoxy, double sided, with a Faraday shield on the backside. All resistors in the signal path are 1% tolerance, metal-film. Critical capacitors are filmdevices with high dielectric strength and ultra low absorption characteristics. An enormous CinemaGrand Signature power source built around a massive power transformer provides the ultimatemuscle for limitless dynamics.

I could go on and on, but here’s the best part: I’ve included two kinds of outputs on the center,front left and front right:(1) a standard voltage-source (i.e., near zero impedance) output for all typical applications and(2) a higher-impedance current-source output, which many prefer for electrostatic, planar mag-netic, or ribbon speakers. Or you can biwire your system with the voltage source driving thewoofer(s) and the current source driving the upper part of the system. In many cases this providesby far the best possible interface between the amplifier and the speaker system.

Whichever way you decide to hook up the Sunfire Cinema Grand Signature, it will create amultilayered soundstage that is deep, wide, three-dimensional, and utterly believable. The optionalcurrent-source output can coax forth a sensuous, delicately detailed musical voice long associatedwith low-powered classic tube amplifiers. (The current-source characteristic of vacuum tubes isthe dominant factor in the soundstage delivery of classic tube amplifiers).

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User's Manual

Your Cinema Grand Amplifier shouldreach you in perfect condition. If you do noticeany shipping damage, please contact yourSunfire Dealer immediately.

Gently lift out the unit and remove all thepacking material and accessories. It isimportant to save all the packing materialsand the box in case your amplifier ever needsto be moved or shipped for repair.

Make sure that you keep your salesreceipt. It is the only way to establish theduration of your Limited Warranty and it maycome in useful for insurance purposes.

Please make a note of your serial numberlocated on the rear panel:

Serial #:

___________________________

Purchased at:

___________________________

___________________________

___________________________

Date: _______________________

Unpacking

Unpacking and Specifications

© 2001 Sunfire Corporation.All rights reserved. Sunfire Corporationreserves the right to improve its products atany time. Therefore, specifications are subjectto change without notice.Manual part number : 913-034-00 Rev A

SpecificationsPower output

425 watts continuous, per channel, allchannels driven into eight ohms from20 Hz to 20 kHz with no more than 0.5%T.H.D.

Power at clipping, minimum:850 watts per channel into four ohms.1700 watts per channel into two ohms(time limited basis).

Hum and Noise-103 dB, A-Weighted

Maximum output current120 amperes peak to peak per channel

Maximum output voltage58 Vrms

Output impedance Front Leftand Front Right channels

Voltage source: Approx zeroCurrent source: Approx one ohm

Input impedance, RCA input24kΩ

Input sensitivity for rated outputUnbalanced: 2.0 VrmsBalanced: 1.0 Vrms

Input impedance, XLR input24kΩ, each leg balanced to ground

Female XLRPin 1 is groundPin 2 is negative (cold)Pin 3 is positive (hot)

Dimensions19.0 inches wide6.5 inches high (including feet)16.75 inches deep (including connectors)

Weight45 lbs

FinishBrushed aluminum and black anodize

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User's Manual

Read and follow all safety instructionsshown on pages 2 and 3.

Observe the following precautions whenchoosing a location for your Cinema GrandAmplifier:

• Protect it from prolonged exposure todirect sunlight and other directsources of heat, such as heatingvents and radiators.

• Do not expose the unit to rain ormoisture. If fluid or a foreign objectshould enter the unit, immediately turnoff the power and contact your SunfireDealer.

• Avoid excessive exposure toextreme cold or dust.

• Do not place heavy objects on top ofthe unit.

• Allow adequate ventilation around theamplifier; do not cover the ventilationslots.

AC Power ConsiderationsEnsure that the unit is plugged into an

outlet capable of supplying the correct voltagespecified for your model. The outlet should becapable of supplying 15 amps for the 120Vmodel, 8 amps for the 230V model.

CareIf you need to clean the front surface, first

turn off the power and then use a slightlydampened cloth, rubbing with the grain. Becareful not to scratch the display window.

Connection TipsBefore setting up your new system,

please consider the following :

• Always make sure that your compo-nents are all turned OFF beforemaking or changing connections.

• Make sure that the power cords of allyour components are attached to thesame outlet or at least to the samecircuit. This will reduce the possibilityof a ground loop in the system.

Make sure that the total currentdraw does not exceed thecurrent rating of the outlet.

• Use the XLR inputs if your preamplifierhas XLR outputs. These balancedconnections provide superior noiserejection.

• Whenever possible, keep the powercords away from the signal cablesor speaker wires to prevent any humor interference being heard in thespeakers.

• Choose reliable hookup cables, alsocalled patch cords or RCA cables. Theyshould be fully shielded and as short aspossible for the job.

• Some patch cords can be a very tightfit and there is usually a preferredmethod of getting them off, some haveto be removed with a twisting action.Be gentle or you may damage thejacks of the amplifier or your othercomponents.

• Some special patch cords can only behooked up in one direction, these areusually marked with arrows.

• It is usual for the right patch cord plugsto be red and the left connections to bewhite, grey or black. Video connectionsare usually yellow.

Installation

Installation

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User's Manual

Front Panel Features

OverviewYour Cinema Grand Amplifier has five

channels of power amplification combined inone chassis for the purpose of reproducingmusic or video soundtracks. It accepts linelevel signals from a controlling preamplifierand amplifies them to a higher level, suitablefor driving powerful stereo and home theaterspeakers.

MeterThe front panel meter indicates the total

energy available from the trackingdownconverter power supply. It is calibrated inJoules and will normally indicate approxi-mately 480 Joules. Note that the needle doesnot move under normal use.

Crystal BaseThe glass base is intended to ensure

proper airflow under the amplifier. A goodchoice for the amp location is centeredbetween the loudspeakers on the floor, usingthe glass base to prevent the carpet fromrestricting the airflow. If you choose to placethe unit on a shelf or other hard surface, thebase will isolate the amp from vibration andwill help make an attractive installation.

IlluminationThe meter is illuminated by an incandes-

cent lamp operating at a very warm colortemperature. I have been influenced by thescale lighting of classic electronic equipmentfrom the 1950’s, with their warm dim glow,usually with a “headlight effect” from the lamp.I incorporated that historical look and feel intothis meter lighting. It is decidedly not “evenlyback-lit” with a cool to cold color temperature.I hope you like my unusual meter lightingtreatment.

A switch has been provided on theunderside of the unit toward the front. Thisswitch gives you the ability to dim the meterlamp to reduce distractions in a home theaterenvironment. I like the brighter of the twosettings, as it illuminates the meter nicely andmatches my other Sunfire equipment. Feelfree to choose the setting that suits you.

Front Panel Features

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User's Manual

3. XLR InputsIf your preamplifier has XLR outputs,

connect them to the XLR inputs. Use theminstead of the RCA inputs because balancedconnections offer superior noise rejection.

The female XLR inputs are wired asfollows:

Pin 1 is groundPin 2 is negative (cold)Pin 3 is positive (hot)

Balanced connectionspass the input signal alongtwo conductors. If there is any external noiseand interference passing into the audio lines,both conductors will receive the same amountof noise. This noise is then rejected in thebalanced input stage of the Cinema GrandAmplifier.

4. Current Source Outputs and

5. Voltage Source OutputsThe front left, front center and front right

channels have two sets of outputs. Thevoltage source output has a source imped-ance of approximately zero ohms. The currentsource has a source impedance of approxi-mately one ohm. The left rear and right rearchannels have voltage source outputs only.

RearPanelView

Rear Panel Features5 4 13 2

678

Rear Panel Features

1. AUTO/ON/OFF SwitchYour Cinema Grand Amplifier is

designed with an automatic on/off circuit.

• In the AUTO-ON position, the amplifierwill automatically turn on if an audiosignal is present at the left front orcenter inputs. The amplifier willautomatically turn off after approxi-mately 30 minutes absence of anaudio signal.

• In the POWER ON position, theamplifier is always on.

• In the POWER OFF position, theamplifier is always off.

2. RCA InputsYour Cinema Grand Amplifier has three

sets of inputs for each of the five channels.Two are unbalanced RCA inputs and one is abalanced XLR type.

The two RCA inputs for each channel arejoined together internally and either one canbe connected to the corresponding output ofyour preamplifier. The other can be used as adaisy-chaining output, sending the preampli-fier output signal to another channel or toanother amplifier.

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User's Manual

Rear Panel Features

The top post of each pair is the positiveoutput, and connects to the positive (red) postof your speaker. The bottom post of each pairis the negative, and connects to the negative(black) post of your speaker. The posts canaccept bare wire, spade terminals, and dualor single banana connectors.

According to your musical taste, you mayselect the current source for electrostatic,planar magnetic or ribbon speakers. Selectthe voltage source for subwoofers. For conebased systems, use either. For a biwiredsystem, use the current source for midrangeand treble drivers and use the voltage sourcefor the subwoofer(s). These are suggestionsonly. By all means, please feel free to experi-ment with other wiring options.

NOTE: The current source output is avoltage source modified to yield a currentsource impedance of one ohm. This corre-sponds approximately to a vacuum tubeamplifier output impedance and constitutesthe dominant factor in the soundstage deliveryof classic vacuum tube power amplifiers.

6. Current Source FusesEach current source output has an in-line

fuse to protect your speakers. If one everopens, there will be no output to that speaker.

7. IEC connectorThe amplifier comes with a detachable

Linecord which attaches here. Make sure it isfirmly pushed in place. Connect the other endto an AC outlet which is properly configuredfor the type of plug and has the correctvoltage for your model.

8. Line fuseIf this fuse fails, replace it with the exact

same type and current rating.

Note: Always unplug the powercord from your AC outlet beforeremoving the fuse.

With a flat ended screwdriver, push thefuse carrier in slightly and turn it counter-clockwise to release.

+ -+ -

+-

+

-

Banana

SpadeBare Wire

Dual-Banana

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User's Manual

System Configurations

If your preamplifier has RCA outputs, itcan be connected to the amplifier inputs asshown. This diagram also shows how thevoltage source outputs connect to the inputposts of your front speakers. (The currentsource can be used instead, as shown on thenext page).

The following pages show some typical connections that you might make in your installation.They show how the inputs and outputs of the Cinema Grand Amplifier are connected to yourpreamplifier and speakers.

System Configurations

R = Right ChannelC = Center Channel,L = Left ChannelRS= Right Surround (rear) ChannelLS = Left Surround (rear) Channel

Unbalanced RCA inputs and voltage source output connections

+ -R

+ -C

+ -RS

+ -L

+ -LS

RLC

UNBALANCEDPREAMP OUTPUTS

LOUDSPEAKERS

RSLS

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User's Manual

If your preamplifier has XLR outputs, itcan be connected to the XLR inputs asshown. This diagram also shows the currentsource output connections to the frontspeaker inputs. (The voltage source outputscan be used instead, as shown on the previ-ous page).

System Configurations

Balanced XLR inputs and current source output connections

+ -R

+ -C

+ -RS

+ -L

+ -LSLOUDSPEAKERS

RLC

BALANCEDPREAMP OUTPUTSRSLS

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User's Manual

If your speakers can be biamped, theCinema Grand Amplifier can be configured toprovide a very powerful stereo system.

A speaker which can be biamped orbiwired will have two sets of binding posts.Sometimes these posts are joined withshorting links for normal operation.

Make sure that any links areremoved when you want to biamp orbiwire the speakers.

Each speaker can be driven by twoamplifier channels, one to drive the wooferand one for the upper range. You will need touse four amplifier channels to run two speak-ers.

If you use the Cinema Grand Amplifier forbiamping, then a total of three speakers canbe connected. You will need an extra twochannel amplifier if you want to run the rearspeakers in a home theater system.

Biamping

Tweeter

Inputs

Woofer

System Configurations

Output connections• Connect the amplifier’s right rear

output to the right speaker’s wooferinput terminals and connect theamplifier’s right front current sourceoutput to the right speaker’s upperrange input terminals. If you prefer,you could use the right front voltagesource instead.

• Connect the amplifier’s left rear outputto the left speaker’s woofer inputterminals and connect the amplifier’sleft front current source output to theleft speaker’s upper range inputterminals. If you prefer, you could usethe left front voltage source instead.

Input connectionsEach amplifier channel has two RCA

inputs which are connected together inter-nally.

• Connect the preamp’s stereo output tothe front channel RCA jacks. Theninstall short interconnects from theother unused front RCA jacks acrossto the rear channel RCA jacks. In thisway, the front and rear amplifierchannels are fed with the same signalfrom your preamp.

• Note: you cannot use balanced cablesin, with RCA out, or RCA in withbalanced out.

If you have an external active crossover,then you can greatly increase the efficiency ofyour system. The crossover will split thepreamp signal into two frequency ranges. Therear channel amplifier will receive the lowfrequency range, and the front channelamplifier will receive the higher range. This isefficient because each channel only amplifiessignals within the frequency range of thespeaker element they are driving. Little poweris wasted. Make sure that you set the cross-over point of your active crossover to matchthe crossover point of your speakers.

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User's Manual

System Configurations

Note: The center channel can be used todrive a third speaker, or left unconnected.

Biamping connections

+ -RIGHT

TWEETER(CURRENTSOURCE)

+ -RIGHT

WOOFER

+ -LEFT

WOOFER

+ -LEFT

TWEETER(CURRENTSOURCE)

RL

UNBALANCEDPREAMP OUTPUTS

LOUDSPEAKERS

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User's Manual

If your speakers can be biwired orbiamped, they will have completely separateinput terminals for the woofer section and theupper range. See the speaker diagram anddiscussion on page 12.

Make sure that any links betweenthe woofer and upper range postsare removed from the speakers

when you want to biamp or biwire them.Consult your speaker owner’s manual fordetails.

The center, front left and front rightchannels each have two pairs of outputswhich can be used to biwire your speakers.The idea is to use the voltage source to drivethe woofer, and the current source to drive theupper range. This will offer improved perfor-mance and still allow you to connect fivespeakers for your home theater system.

Page 15 shows the input and outputconnections for biwiring a left front speakerand a right front speaker.

Biwiring

System Configurations

Output connections• Connect the amplifier’s right front

voltage source output to the rightspeaker’s woofer input terminals andconnect the amplifier’s right frontcurrent source output to the rightspeaker’s upper range input terminals.

• Connect the amplifier’s left frontvoltage source output to the leftspeaker’s woofer input terminals andconnect the amplifier’s left frontcurrent source output to the leftspeaker’s upper range input terminals.

• If your center speaker can bebiamped, then connect it to the centerchannel outputs in the same way asabove. Otherwise, connect it as shownon pages 10 and 11.

• Connect the rear speakers as shownon pages 10 and 11.

Input connections• Connect your preamplifier’s outputs to

the amplifier’s corresponding inputjacks. If your preamplifier has XLRoutputs, use these wherever possible.

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User's Manual

Note: The center and rear inputs andoutputs have been omitted for drawing clarity.If used, they can be connected as shown onpages 10 and 11.

System Configurations

Biwiring connections

+ -RIGHT

TWEETER(CURRENTSOURCE)

+ -LEFT

WOOFER(VOLTAGESOURCE)

+ -LEFT

TWEETER(CURRENTSOURCE)

RL

UNBALANCEDPREAMP OUTPUTS

LOUDSPEAKERS

+ -RIGHT

WOOFER(VOLTAGESOURCE)

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User's Manual

AmplifierOutputs

Speaker connectionsIf your speakers cannot be biwired, the

normal configuration is to have one speakerconnected per channel. The connection ofmore than one per channel will tend todegrade the speaker’s frequency response.For the best results use one speaker perchannel.

If you want to connect more than onespeaker per channel, there are two mainways: series or parallel.

SeriesFor an example, if you want to series-

connect two speakers to the front rightchannel of the amplifier:

• The positive output terminal of thefront right channel connects to thepositive input of the first speaker.

• The negative input of the first speakerconnects to the positive input of thesecond speaker.

• The negative input of the secondspeaker connects to the negativeoutput terminal of the front rightchannel.

• The total impedance of speakers inseries is found by adding their imped-ances together.

• Series connections are easier on theamplifier than parallel connections,because the total impedance is higherthan driving a single speaker. Forexample, two four ohm speakers inseries is equivalent to an eight ohmload.

ParallelFor an example, if you want to parallel-

connect two speakers to the front rightchannel of the amplifier:

• The positive output terminal of thefront right channel connects to thepositive input of the first speaker andto the positive of the second speaker.

• The negative output terminal of thefront right channel connects to thenegative input of the first speaker andto the negative of the second speaker.

• The total impedance of equal speakersin parallel is found by dividing theimpedance of one speaker by thenumber of speakers. For example, twoeight ohm speakers in parallel is a fourohm load (eight ohms divided by two),four eight ohm speakers in parallel is atwo ohm load (eight ohms divided byfour).

• Parallel connections are harder on theamplifier than series connections asthe total impedance is lower comparedto driving a single speaker, so theamplifier has to produce more current.

• You must make sure that the lowerimpedance does not cause the ampli-fier to overheat, shut down, blow theline fuse, or pop your circuit breaker. Ifthis happens, you should reduce thenumber of speakers wired in parallel,or rewire them in series.

AmplifierOutputs

Seriesconnection

Parallelconnection

Speaker Connections

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User's Manual

Troubleshooting

The Sunfire Cinema Grand Amplifier isexpertly designed and built to provide years oftrouble-free performance. Most problems thatoccur can usually be solved by checking yoursetup or making sure that the componentsconnected to the amplifier are on and fullyoperational.

The following information will help youdeal with common setup problems you mayexperience during normal use of your unit. Ifthe problems still persist, please contact yourSunfire Dealer for assistance.

No sound from one or morespeakers• Speaker cables may have come undone.

Turn off your system and check the cables

• The preamplifier volume level is low forthe channels concerned. Recheck thepreamplifier calibration procedure.

• The preamplifier mute switch is on

• The correct preamplifier surround mode isnot selected

• A tape or external processor loop may beengaged on the preamp.

Current source outputs notworking• Check the current source fuse. If it blows

often, it is acceptable to replace with a slo-blo 7 ampere fuse.

The amplifier shuts down oftenor the line fuse blows often• Check that the positive and negative

speaker wires are not shorted.

• Make sure that no speakers are shortedinternally. An ohm-meter should read 2 ormore ohms for most speakers.

• If you have connected speakers in paral-lel, the overall impedance may be too low.It is recommended that you rearrange thespeakers in series to increase the overallimpedance, thus taking some of the loadoff the amplifier.

Troubleshooting• Make sure that the amplifier has good

ventilation and is not overheating. Use thecrystal base to allow good airflow under-neath. If the amplifier is in a closed rack,open up the rear panel or use a quiet fanfor improved ventilation.

Hum in your speakersThis may be due to a system ground loop,

rather than a problem with the amplifier. Takethe following steps to isolate the cause of anyhum.

Remember to turn off all components inyour system before disconnecting or connect-ing any cables.

• If your preamplifier has XLR balancedoutputs, use them because they offergreater immunity to noise fields.

• Try to have all of your equipment on thesame electrical outlet or circuit. Group allthe low power components (preamp, CDplayer, DVD etc.) on a single outlet orpower strip. This is provided that theoverall current draw from your equipmentdoes not exceed the rating of the outlet orbreaker.

• Disconnect all cables which come fromoutside of the room, such as cable TV,satellite TV, or roof top antennas. If thehum is caused by the cable TV line, thenyou will need a “ground loop isolator.” Thisis an inexpensive device fitted in line withthe coaxial cable feed, see your TV/videodealer.

• As a test, disconnect any other componentwhich has a grounded power cord.

NOTE: Never remove the groundpin from any power cords. This isvery dangerous.

• If the hum persists, disconnect all thesource components one at a time from theback of the preamp, until you identify theproblem.

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User's Manual

• Try moving the speaker cables away fromany power cords. Try just one speaker,connecting it to different channels and seeif an amplifier channel is bad.

Other causes of noise• Speaker noise may also be caused by

interference or noise on your AC line.Make sure there are no large appliancessharing the line, or halogen lamps orlamps with dimmer controls.

• Try connecting your system to another ACsocket on a separate line.

• If the hum is heard from within the ampli-fier and not through the speakers, this mayalso be caused by interference on the ACline. Internal hum can be made worse by ashelf or cabinet resonating, so try movingthe amplifier to another location.

• Try moving your preamplifier further awayfrom your amplifier. Sensitive preampcircuits may pick up hum from the ampli-fier transformer’s magnetic field.

• Try moving your components further awayfrom the TV, especially if you ever noticethe screen has changed color in the areaclosest to the component.

• If you are still having a problem, remem-ber that Sunfire’s dealers and technicalsupport staff will assist you. Make a list ofthe things you have tried.

Poor bass performance• Make sure that your preamp does not

have the bass level turned down.

• Many surround preamplifiers have controlswhich can direct all the bass to subwoof-ers, or let your main speakers play the fullrange. Make sure that the preamplifier hasbeen correctly set. If you are not using asubwoofer, set the speaker options to“Large.”

• Check that the speaker wires have beenconnected correctly: Make sure that thepositive of each speaker connects to apositive output of the amplifier, and thenegative of each speaker connects to anegative output. If one speaker is wiredincorrectly, than it will be “out of phase”with the others, resulting in poor bassperformance.

• If you have connected the amplifier usingthe XLR inputs, make sure that the XLRcables are wired correctly. If one has thehot and cold reversed, then this will alsocause a speaker to be out of phase.

No high frequency output• If you are biamping or biwiring, make sure

that the current source fuses have notblown.

Troubleshooting

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User's Manual

Sunfire Corporation is proud of its prod-ucts which have been built with care usingadvanced technology and premium compo-nent parts. Your unit has been crafted toperform properly for many years. SunfireCorporation offers the following warranty toyou, the owner of a new Sunfire product:

The Sunfire Corporation Warranty for theCinema Grand Amplifier is in effect for FIVEyears from the date of original retail purchase.The Sunfire Corporation Warranty coversdefects in materials and workmanship.However, the following are excluded: a)damage caused during shipment, b) damagecaused by accident, misuse, abuse of opera-tion contrary to the instructions specified inthe Sunfire Corporation user’s manual, c)units where the serial number has beendefaced, modified or removed, d) damageresulting from modification or attempted repairby any person other than authorized bySunfire Corporation.

The Sunfire Corporation Warrantyextends to the original owner or subsequentowner(s) during the five year warranty periodso long as the original dated purchase receiptis presented whenever warranty service isrequired.

All implied warranties, including warran-ties or merchantability and fitness for particu-lar purposes, are limited in duration to the fiveyear length of this warranty, unless otherwiseprovided by state law.

Sunfire Corporation’s liability is limited tothe repair or replacement, at our option, ofany defective product and shall not in anyevent include property or any other incidentalor consequential damages which may resultfrom the failure of this product.

Some states do not allow limitations on howlong an implied warranty lasts and/or do notallow the exclusion or limitation of incidental orconsequential damages, so the above limita-tions or exclusions may not apply to you.

This Warranty gives you specific legalrights, and you may also have other rightswhich vary from state to state. We suggestthat you attach your purchase receipt to thisWarranty and keep these in a safe place.Thank you for your choice of a SunfireCorporation product.

Service AssistanceWe suggest that you read the Limited

Warranty completely to fully understand yourWarranty/Service coverage.

If your Sunfire Corporation product everrequires service, write or call to:

Sunfire CorporationTechnical Services DepartmentP.O.Box 1589,Snohomish, WA 98291Tel (425) 335-4748Fax (425) 335-4746

You will be directed to an authorizedSunfire Corporation Service Station or receiveinstructions to ship the unit to the factory.Please save the original shipping carton andpacking materials in case shipping is required.Please do not ship Parcel Post.

NOTE: Before sending in your unit for repair,you must call Sunfire for return authorization.

Include a complete description of theproblem, indicating how you have it con-nected, the associated equipment in yoursystem and a copy of your purchase receipt.Initial shipping costs are not paid by SunfireCorporation; return ground shipping costs willbe prepaid if repairs were covered by thescope of this warranty.

Limited Warranty

Limited Warranty

Manual part number : 913-034-00 Rev A