RB-991 - Amplificateur ROTEL - Notice d'utilisation et mode d'emploi gratuit

Type de produit	Amplificateur de puissance stéréo
Marque	ROTEL
Modèle	RB-991
Puissance de sortie continue	200 W/canal sous 8 Ω (20-20 kHz, ≤0,03 % DHT) 300 W/canal sous 4 Ω (20-20 kHz, ≤0,05 % DHT)
Distorsion harmonique totale	≤0,03 % (20 Hz-20 kHz, 8 Ω)
Distorsion d'intermodulation	≤0,03 % (60 Hz:7 kHz, 4:1)
Réponse en fréquence	10-100 000 Hz ±1 dB
Facteur d'amortissement	≥500 (20-20 000 Hz, 8 Ω)
Rapport signal/bruit	120 dB (IHF A network)
Impédance d'entrée / Sensibilité	Entrées RCA et XLR : 33 kΩ / 1,0 V
Impédance des enceintes	4-16 Ω
Alimentation électrique	115 V / 60 Hz ou 230 V / 50 Hz
Consommation électrique	550 W
Dimensions (L x H x P)	440 x 127 x 385 mm
Poids net	16,7 kg
Entrées	RCA (asymétrique) et XLR (symétrique) avec sélecteur
Bornes d'enceintes	Multifonctions (fourche, fil nu, banane)
Caractéristiques principales	Transformateur toroïdal Rotel, circuits imprimés symétriques, protection contre les courts-circuits et la surchauffe
Entretien et nettoyage	Chiffon doux et sec uniquement. Ne pas utiliser de solvants.
Sécurité	Ne pas ouvrir le boîtier. Débrancher avant toute intervention. Utiliser sur une surface stable et ventilée.
Accessoires fournis	Cordon d'alimentation, manuel d'utilisation

FOIRE AUX QUESTIONS - RB-991 ROTEL

Comment brancher l'amplificateur RB-991 ?

Connectez la source (préampli) aux entrées RCA ou XLR en sélectionnant le mode correspondant à l'arrière. Branchez les enceintes aux bornes repérées (+/-) en respectant la polarité. Assurez-vous que l'impédance des enceintes est comprise entre 4 et 16 ohms.

Quelle est la puissance maximale de l'amplificateur ?

L'amplificateur délivre 200 watts par canal sous 8 ohms et 300 watts par canal sous 4 ohms, avec une distorsion inférieure à 0,05%.

L'amplificateur chauffe-t-il normalement ?

Oui, un échauffement modéré est normal. Assurez un espace de 75 mm au-dessus de l'appareil et ne le placez pas dans un espace clos sans ventilation. Si la protection s'allume, vérifiez la ventilation et les connexions.

Que faire si l'amplificateur ne s'allume pas ?

Vérifiez que le cordon d'alimentation est branché et que la prise est sous tension. Contrôlez le fusible secteur au dos de l'appareil. Si le problème persiste, contactez un service agréé.

Puis-je utiliser des câbles XLR et RCA en même temps ?

Non, le sélecteur à l'arrière choisit entre les entrées symétriques (XLR) et asymétriques (RCA). Utilisez un seul type à la fois.

Comment nettoyer l'amplificateur ?

Utilisez un chiffon doux et sec. N'utilisez jamais de produits chimiques ou de solvants qui pourraient endommager la finition ou pénétrer à l'intérieur.

Quelle est la sensibilité des entrées ?

Les entrées RCA et XLR ont une sensibilité de 1,0 volt et une impédance de 33 kohms.

Puis-je empiler d'autres appareils sur le RB-991 ?

Non, ne placez aucun appareil sur l'amplificateur car cela gênerait la ventilation et pourrait provoquer une surchauffe. Laissez un espace d'au moins 75 mm au-dessus.

Que signifie le voyant 'PROTECTION' ?

Le voyant rouge 'PROTECTION' s'allume brièvement à la mise sous tension. S'il reste allumé, cela indique un problème (court-circuit, surchauffe, impédance trop basse). Éteignez l'appareil et vérifiez les connexions.

Comment brancher des enceintes en bi-câblage ?

Le RB-991 ne dispose que d'une seule paire de bornes par canal. Utilisez des câbles de pont (jumpers) sur les enceintes si elles supportent le bi-câblage, sinon connectez un seul câble par borne.

MODE D'EMPLOI RB-991 ROTEL

ROTEL

RB991

Stereo Power Amplifier with RCA & XLR Inputs

OWNERS MANUAL

Please write the serial number, date of purchase and the name of Rotel hifi Authorized Dealer in the spaces provided for your future reference.

Serial number , Purchase date

Rotel hifi Authorized Dealer

- Explanation of Graphical Symbols

The ingting task wih amnented symbol, whin in inequivalent trample is intended to alter you to the presence of unresuited "dangerous vetege" within the product's substance that may be of sufficient magnitude to constitute a risk of eaeine shoo in peron.

The exsation point whin an eoument rangie is needed to aoy you to the pones of imporitior opening and maintenance (reovng) inductors in the literature accompanying the appli

1. Read Instructions - All the safety and operating instructions should be read before the appliance is operated
2. Retain Instructions - The safety and operating instructions should be retained four for future reference.
3. Head Warnings - All warnings on the appliance and in the operating instructions should be adhered to.
4. Follow Instructions - All operating and other instructions should be followed.
5. Water and Moisture - The appliance should not be used near water - for example, near a bathpub, washbow, kitchen sink, laundry tub, in a wet basement, or near a swimmingpool, etc.
6. Carls and Stands - The appliance should be used only with a car or stand that is recommended by the manufacturer.

PORTABLE CARTWARNING
四254

1. Wall or Ceiling Mounting - The appliance should be mounted to a wall or ceiling only as recommended by the manufacturer.
2. Ventilation - The appliance should be situated so that its location or position does not interfere with its proper ventilation. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or placed in a built-in installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings.
3. Heat - The appliance should be situated away from heat sources such as radiators, ovens, or other appliances that produce heat.

APPLICABLE FOR USA, CANADA OR WHERE APPROVED TO THE USAGE

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

ATTENTION: POUR EVITER LES CHOCSELECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNERCORRESPONDANTE DE LA PRISE ET POUSSERJUSQU AU FOND.

1. Power Source - The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance.
2. Power-Cord Protection - Power-supply cords should be routed so that they are not likely to be walled on or pinched by pins placed upon or against them, paying particular attention to cords at plugs, convection receptacles, and the point where they exit from the appliance.
3. Cleaning - The appliance should be cleaned only as recommended by the manufacturer.
4. Nonuse Periods - The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time.
5. Object and Liquid Entry - Cars should be taken so that objects do not fall into and liquids not spilled into the inside of the appliance.
6. Damage Requiring Service - The appliances should be serviced by qualified services personnel when:

A. The power-supply cord or the plug has been damaged, or
B. Objects have fallen, or liquid has been spilled into the appliances; or
C. The apolpliance has been exposed to rain; or
D. The appliance does not appear to operate normally or exhibits a marked change in performance; or
E. The appliance has been dropped, or the cabinet damaged.

1. Servicing - The user should not attempt to service the appliances beyond those means described in the operating instructions. All other servicing should be referred to qualified service personnel.
2. Grounding or Polarization - The precautions that should be taken so that the grounding or polarization means of an appliance in not dated.

A WORD FROM ALL OF US AT ROTEL

Thank you for purchasing our RB 991 stereo power amplifier. This replaces our highly acclaimed RB 990BX power amplifier. We have been designing and manufacturing high quality, high performance audio electronics for more than 35 years. We are famous for our love of music and our passion for good sound. This power amplifier was designed to offer lifelike sound and is a natural extension of our love of music. If the RB 991 is used with the companion RB 993, a 3-channel power amplifier, it will be an excellent foundation for a superb surround sound or music system. We believe that the music and soundtracks played through this amplifier will be a source of enjoyment to you for many years to come. We designed this amplifier to be durable, easy to operate and to have high fidelity to the original sound. Please read this owners manual to ensure that the amplifier is properly installed. We appreciate being a part of your life.

RB 991 DESIGN FEATURES

Our new front panel look reflects the fact that we have made some important changes to this amplifier. A couple of examples would be the toroidal power transformer of our own design and manufacture and the inclusion of balanced XLR inputs. The massive power supply is derived from a large Rotel toroidal power transformer. The RB 991 has a highly regulated power supply to ensure maximum power capability into difficult speaker loads. This type of design is more expensive to manufacture but it is better for the music. This power amplifier will drive 4-ohm rated speakers very well. All aspects of this design have been examined with the final goals being stability when driving low impedance or adverse speaker loads and the faithful reproduction of music.

This is an excellent amplifier for music listening, surround sound or multi-room custom installations. We have designed the printed circuit boards (PCB) with symmetrical circuit traces. This insures that the precise timing of the music is maintained and faithfully recreated. Circuit traces of different lengths change the timing between the channels slightly. This degradation of signal coherence is unacceptable to us. The PCB circuit traces are used to transfer the delicate audio signals because we feel this is more consistent than using wire jumpers for this purpose. The PCB contains metal film resistors and polystyrene or polypropylene capacitors in sonically selected locations.

WHERE TO FIND INFORMATION IN THIS OWNERS MANUAL

INSTALLATION	PAGE 2,3
FRONT PANEL CONTROLS/INDICATORS	PAGE 3
REAR PANEL CONNECTIONS	PAGE 4
FRONT AND BACK PANEL DRAWINGS	PAGE 3,4
SPECIFICATIONS	PAGE 5
TROUBLESHOOTING GUIDE	PAGE 5,6

RB991INSTALLATION

Please place the unit on a DRY level surface, away from direct sunlight. Please do not stack other components on top of the RB 991 as they may cause the amplifier to overheat. We suggest 75mm (-3^) as a minimum clearance above the RB 991. If the amplifier is installed inside a cabinet, please be certain that there is adequate airflow or a cooling fan to ensure proper cooling. Do not allow water

or objects to fall into the amplifier, as these will damage the circuitry. Avoid installing the amplifier in a location where excessive humidity, vibration or moisture will be a problem. We recommend installing the RB 991 in furniture designed to house hi fi components.

Audio component furniture will reduce or suppress vibration. All audio components will provide improved sound when free from vibration. Ask your ROTELhi FI AUTHORIZATION DEALER for advice about component furniture and proper installation of audio components. Please be careful to keep digital, video or audio signal cables and the power cords separated in your installation. This will minimize the chance of interference from the power cords or digital cables getting into the analog or video signal cables. We recommend high quality shielded cables in sound systems to minimize any potential interference.

ELECTRICAL REQUIREMENTS

This amplifier is designed to operate on AC voltage and the correct voltage is displayed on the back panel. Do not attempt to operate the amplifier on incorrect voltage as this will damage the circuitry and void your warranty. If you are in doubt about the correct voltage for this amplifier we suggest reading the label on the back panel or consult your ROTELhi fi AUTHORIZATION DEALER for confirmation of the correct voltage. Connect the POWER CORD to your wall socket for AC power. When you wish to disconnect the power cord from the wall, grasp the plug firmly in your hand to pull it out of the wall socket. Do not unplug the power cord by pulling the cord only. This may damage the power cord and create a hazardous condition. We strongly recommend that the amplifier be connected to the main's wall socket or an AC power line filter, not an extension cord.

If you wish to clean the cabinet, we suggest a clean, soft DRY cloth. Never use cleaning compounds or solvents to clean the cabinet as they may damage the finish or remove the labels. These could damage the circuitry if any residue falls inside the amplifier. There is NO user serviceable part inside this amplifier. Please do not open the cabinet, as this will expose you to the risk of potentially dangerous voltage and the risk of electric shock.

FRONT PANEL

FRONT PANEL CONTROLS/INDICATOR LIGHTS

The front panel includes the POWER button, the POWER and PROTECTION indicator lights. Press the POWER button once, the amplifier will turn ON, the POWER and PROTECTION (briefly) indicator lights will illuminate. Press it again, the amplifier will turn OFF and all the indicator lights will extinguish.

REAR PANEL

REAR PANEL CONNECTIONS

When connecting the amplifier, please be certain to connect the correct inputs to the appropriate left or right (R, L) channels from your preamplifier or processor outputs to avoid incorrect channel placement during playback of your favorite music or movies. If you are using the XLR/Balanced inputs, please switch the back panel selector switch to the BALANCED input setting. The SPEAKER terminals are color coded to help with you make correct connections. The speaker terminals are red for positive (+) and black for negative (-) connections. Most speakers have the same color coding system for these connections. Please ensure these connections are correct before turning the amplifier ON for the first time. Incorrect phase connections (amplifier - to speaker - in one of the channels, for example.) won't harm anything but will result in little or no bass response in your system.

The SPEAKER terminals will accept spade connectors, bare wire or "banana" plugs (Non CE mark countries) for speaker connections. Regardless of the type of speaker wire connection made, please check to see that no stray wires are touching between the positive and negative speaker terminals for each channel. This will cause an internal protection fuse to fail, and the amplifier will not play.

Please remember that this is a high-powered amplifier and turn it off before making any changes to the connections or unplugging any input cables. This will avoid any potential damage to the delicate tweeters in your speakers Transient sounds may occur when connecting or disconnecting input patch cables if a power amplifier is on.

A FEW FINAL WORDS FROM THE PEOPLE AT ROTEL

We have designed this amplifier using high performance test equipment and highly trained human ears. We believe both methods are useful in the design of high fidelity audio electronics. This method of design and manufacturing is time consuming but we feel the music benefits from this care and attention to detail. With our reputation for excellent reliability and sound quality, you can be certain that the RB 991 represents excellent value for your money. We realize that there are many choices available and we thank you again for choosing the RB 991 for use in your sound system. Enjoy the music!

SPECIFICATIONS:

Continuous Power Output	(20-20 kHz, ≤ 0.03%, 8 ohms)	200 watts/ ch.
	(20-20 kHz, ≤ 0.05%, 4 ohms)	300 watts/ ch.
Total Harmonic Distortion	(20 Hz-20 kHz, 8 ohms)	≤ 0.03%
Intermodulation Distortion	(60 Hz: 7 kHz, 4:1)	≤ 0.03%
Frequency Response		≥ 10-100,000 Hz, ± 1 dB
Damping Factor	(20-20,000 Hz, 8 ohms)	≥ 500
Speaker Impedance		4-16 ohms
Signal to Noise Ratio	(IHF A network)	120 dB
Input Impedance/Sensitivity	(RCA Inputs)	33 k Ohms/1.0 volt
(XLR Inputs)		33k Ohms/1.0 volt
Power Requirements		115 Volts, 60 Hz or
		230 Volts, 50 Hz
Power Consumption		550 Watts
Dimensions (W, H, D)		440 x 127 x 385 mm
		17.38 x 4.76 x 15.16"
Weight (net)		16.7 kg, 36.74 lb.

All specifications are accurate at the time of printing. Rotel reserves the right to make improvements without notice.

SYSTEM TROUBLESHOOTING HINTS

NO POWER	IS THE AC CORD CONNECTED TO A SWITCHED AC OUTLET?
	IS THE SWITCHED AC OUTLET TURNED ON?
	CHECK THE POWER FUSE FOR THE AC OUTLET.
NO SOUND	CORRECT INPUT SELECTED? IS THE AMPLIFIER
	TURNED ON? IS THE SOURCE COMPONENT TURNED ON?
	IS THE SOURCE COMPONENT CONNECTED PROPERLY?
	ARE THE SPEAKER WIRES CONNECTED PROPERLY?
NO BASS	IS THE SUBWOOFER AMPLIFIER TURNED ON?
	IS THE POWERED SUBWOOFER TURNED ON?
	ARE THE“WOOFERS” IN YOUR SPEAKERS DAMAGED?
	ARE THE SPEAKERS WIRED CORRECTLY FOR PHASE?
POOR TRACKING(CD PLAYER)	IS THE DISC DIRTY OR SCRATCHED? IS THE DISC
	SEVERELY WARPED? IS THE DISC SEMI-TRANSPARENT OR
	POORLY MADE WITH VISIBLE “PIN” HOLES? IS THE CD
	CRACKED?
POOR, DULL SOUND	ARE THE HEADS DIRTY? HEADS MAGNETIZED FROM LONG
WOW & FLUTTER(TAPE DECK)	USAGE WITHOUT DEMAGNETIZING? ARE THE PINCH
	ROLLER AND THE CAPSTAN DIRTY? CLEAN WITH PURE
	ALCOHOL, “Q” TIP COTTON BUDS OR A TAPE DECK
	CLEANING KIT, DEMAGNETIZE THE HEADS WITH A HAND
	HELD DEMAGNETIZER. DO NOT USE ABRASIVE DRY
	CLEANERSI

DISTORTED BASS	OVERLOADING SMALL SPEAKERS? TOO LOUD VOLUME"CLIPPING" YOUR AMPLIFIER?
"HUM" IN SYSTEM	AC CORD,VIDEO,DIGITAL AND AUDIO CABLES TOUCHING? THE AC CORD SHOULD BE SEPARATE FROM SIGNAL CABLES SIGNAL CABLES LAYING NEAR A LARGE POWER TRANSFORMER, SUCH AS IN A POWER AMPLIFIER? DEFECTIVE OR UNSHIELDED SIGNAL CABLES?
OVERHEATING	IS ANOTHER COMPONENT STACKED ON THE AMPLIFIER? IS THE AMPLIFIER ENCLOSED IN A SMALL SPACE? A MINIMUM OF 3 TO 4" (~8-10 CM) CLEARANCE IS NEEDED ABOVE THE AMPLIFIER IN A SYSTEM. DO NOT STACK COMPONENTS ON THE AMPLIFIER. AN AMPLIFIER NEEDS TO "BREATHE" FREELY TO STAY COOL.
POOR RECEPTION (FM RADIO)	IS THE ANTENNA CONNECTED PROPERLY? IS THE ANTENNA MOUNTED AS HIGH AS POSSIBLE? IS THE ANTENNA ORIENTED FOR BEST RECEPTION? IS THE FM STATION Distant? AN OUTDOOR ANTENNA MAY BE NECESSARY. ADJUST THE ANTENNA FOR BEST RECEPTION.
NOISY RECEPTION (AM RADIO)	IS THE ANTENNA CONNECTED PROPERLY? IS THERE A LARGE ELECTRICAL MOTOR, COMPUTER OR COMPRESSOR NEAR THE TUNER OR ANTENNA? NOISE IS EASILY RECEIVED IN THE AM BAND. ADJUST THE AM ANTENNA FOR BEST RECEPTION AND MINIMUM INTERFERENCE.

ROTEL

THEROTELCO.,LTD.

BUNZAN-SHINSEN-BLD,4F 10-10 SHINSEN-CHO,SHIBUYA-KU,TOKYO 150JAPAN