Rotel RB-990BX User manual

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STEREO POWER AMPLIFIER
RB-990BX
ENGLISH. 1
06UTSCH. 5
FRANIJAIS. 8
... 11
I WARNING
' TO PREVENT FIRE OR SHOCK HAZARD,
DO NOT EXPOSE THIS APPUANCE
TO RAIN OR MOISTURE
Write your SERIAL NUMBER here.
The numl>er Is located near the name
pme on the rear oanei.

SAFETY INSTRUCTIONS
CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK. DO NOT REMOVE
COVER (OR BACK). NO USER.SERVICEABLE
PARTS INSIDE. REFER SERVICING TO
OUAUFIED SERVICE PERSONNEL.
• Explanation ol Graphical Symbols
A r h» itMi) sMh AirswtMM
10 ai«n >«u (0 ino
MHIKO ol un<r)»M *00 '(UAQO'ebS orPhu Ih*
poouo'o o^eiMaKO Mr mt m o' arfi>o«m no^iwM
10 coxKPioi* • nw «l ooune *wk ro mimai
A T i • osrtMnoMA pgaw Mnoi •» ootMof* iriWi^t* a
«> >x«M « * 0<1 yOg » M pTfOonct O' «<«»«•«
Of W4kn9 oftd oiovueivto itt 1M
••• rslur* WOCTpiiljiPtg M MVMnco
EXCLUSIVE MOTE FOR U.K.
\l your unii cccrt«s mth a 2<w^ cable withoui a Qkig. rriahe
certain live and neutral leads are connecled lo the proper
lerminaJs, Check ihat the lerminais are screwed down
firmly and no toose strands or wire are present.
IMPOf^TANT: The wires in this mains lead arecoloured
in accordar>ca with ihe Icrilowing cede:
8LUS: NEUTRAL
anOWNr LIVE
As the colours ol the wires m the m uns lead of this ap<
paraius may nol correspond wiin thv coiogred markings
ideniilying lha terminals in your plug proceed as follows
The wrre which is coloured 6LUE most be connected to
(he terminal which is marked with me latter N or coloured
BLUE or SLACK, The wire which ii. coloured BROWN
musi be connected to the lerminal which is marked with
the lerrer L or colour BROWN or RED
1. Read insiruciions— All ihe safety and operaurig mstruc*
itons should be read Oelora lha appliance is operated
2. Retain Instructions — The safely and operaling insiruc*
(ions should be retained for luture reference.
3. Head Warnings All warnings on the appliance artd in
the operating inslruetidns should be adhered lo.
4. Follow instructions — All operating and other insirucllons
should be followed.
$. water and Moisture — The applianca should not be used
near water — for example, near a balhlub. washbowl,
kitchen sink, laundry luo. in a wet casement, or near a
swimming pod. eic.
6. Carts ar>0 Stands ~ The apphance siiduid be used onty
with a carl or siand lhal is reccinmended by ihe
manufacturer,
7. Wall or Ceiling Mounting — The appliance should be
mounted to a wall or ceiling only as recommended by
(he manufaclurer.
a. Ventilation — The appliance should be situated so thai
its toealion or position does not interfere with its proper
ventilation. For exampte, the appliance ^ould not be
situated on a bed. sola. rug. or simitar surface ihat may
block the vent'lation openings: or placed in a buift*in ih*
staitaiioh, such as a bookcase or cabmei that may im*
pede tha flow of air through the veniilation openings.
9, H eal ~ The appliance should be situated away from heat
sources such as radraicrs, sieves, or other appliances
that produce heal.
10. Power Sources — The appliance should be connected
lo a power supply only ol the type described in (he oper¬
ating instructiorts or as marked on the appliance.
11. Power-Cord Prelection — Power*supply cords shotHd be
rouied so thal they are not likely to be walked on or
pinched by ilema ptacad upon or agamsl ihem. paying
particular attention to cords at plugs. conven>er>ce recep*
tacles. and the POini where they exit from the appliance.
12. Cteaning — The appliance shcufd t> cleaned only as
recommended by ihe manulaC'urer.
13. Nonuse Periods — The power cord ol the appliance
should be unplugged from the ouHei when left unused
for a long period ol (ime.
14. Object and Lipuid Eniry — Care should 'K laken so thai
objects do not fan mio and liquids not *oi'ied into me m*
side of Ihe appliance.
15. Damage Reguinng Service — The apjiliance should be
serviced by quaitiied service personr.a! when;
A. The power-supply cord or me plug has been
damaged: cr
6, Obiects have f.tllen, or liquid has been spilled into
the appliance: or
C. The applience has been exposed to rain: or
D. The appliance does nol appear to operate normally
or exhibits a marked change m performance: or
E. Tha appliance has been droppM. or the cabinet
damaged.
16. Servicing — The user should not attempt to service the
appliance beyorui those means described in the oper¬
ating instructions Ati other servicing should be referred
lo qualified service personnel.
17. Grounding or Polarization — The precautions that should
be taken so thai the grounding or polanzation means ol
an appliance is r>ot defeated.

STEREO POWER AMPLIFIER RB-990BX
ENGIISH
INTRODUCTION
We al Rolel want lo thank you for purchaaing our audio
product.
Rotel audio producla are designed lo use the latest eleclronic
technology, and they incorporate our long etrperience as a
specialist manufacturer of audio equipment. We are confident
mat you will find salislaction in the high quality sound and
top performance, and that you will find pleasure in Ihe funo-
lional beauty achieved through human-engineering ooncept.
Before starting operation, please read this Instruction manual
thoroughJy and acquaint yourself with the proper mode of us¬
ing the unit and all its connections.
We hope you will enjoy top-notch performance for many years
to come.
SPEAKERS
When using the RB-990BX as a stereo power amplitier, please
use a speaker system with an Impedance rarrge 014-16 ohms.
The speakers’ Impedance specifications can be found on the
plats at the rear ol the speskets or In the user’s manual.
Please check lo be sure they are of the correct Impedance.
CABLES
To ensure that the RB-990BX operates al its full potential and
you can enjoy the most exceptional sound quality from your
system, we strongly recommend using high-quality RCA pin
cables lo connect the RB-990BXtothe control amplitier and
low-capacity, low-impedance speaker cables.
BEFORE ENJOYMENT/POWER SUPPLY
Follow the instructions below for maximum safety:
t. Use a wall outlet for power supply
Be sure to connect the AC line cord to a house-hold wall out-
let. Be certain mat the outlet voltage matches me electrical
rating of Ihe unit, found on Ihe rear panel name plate.
2. Connecting and removing AC cord
Be sure lo connect or disconnect the AC line cord only after
turning off the power switch lo prevent possible shock noise
or damage to the speakers.
3. Ventilate the unit welt
Never block any verlilalion holes al Ihe lop and bottom of Ihe
unit. Be sure also to provide ample ventilation space around
the unit. Poweniilation may result in damage due lo exces¬
sive heal,
4. Do not open the cabinet
In order to avoid electric shock or damage to Ihe component,
never open the cabinet. Ilaloreign oOjeci tells Inside the unit
by mtstake, turn the power off. disconnect Ihe wall plug, ano
consult a qualified electrician or your dealer,
5. Installation
Be sure lo place the unit In a level and flat place where it is
free from humidity. viDration, high temperature and not ex¬
posed 10 direct sunlight.
Be carelul not to place the unit in a highly enclosed place such
as near a wail or on a bookshelf. A poor ventilation will cause
undesirable effects to the unit.
6. Moving Ihe unit
When transporting, remove Ihe AC cord from me wail outlet
and all other connected cords on me rear panel to prevent
wire breakage and short circuits.
7. If the unit gets wet
If Ihe unit should get wet, immediately disconnect the AC cord,
and consult your dealer or a qualified eleclrcian.
8. Cleaning and maintenance
Oo not use chemicals such as benzine or Ihinners on the Ironl
penel. Always use a sett, dry cloth to clean Ihe unit.
9. Owner’s manual
Keep me owner's manual near Ihe unit, and record me serial
number (found on the rear panel) on the cover.

SPEAKERS AND PREAMPLIFIER CONNECTION
1. Conned the speaker cord of me rigtil speaker lo me
RIGHT terminals and the cord of the left speaker to me
LEFT terminals of SPEAKERS terminals. Note me + -
connection (+ lead lo + terminal and - lead lo -
terminal).
2. Usin9 two cables wim phono connectors, conned the
OUTPLfT L jack of the preamplifier lo me INPUT LEFT jack
of this unit and the OUTPUT R jack of the preamplifier to
the INPUT RIGHT jack of this unit.
HOW TO CONNECT THE SPEAKER CORDS TO THE
SPEAKERS TERMINALS
strip the cord end and twist leads lirmly. then connect it to
the SPEAKERS terminal. The SPEAKERS terminals of this
unit are screw type. Turn the screw counterclockwise and
insert the cord end. Then lighten the screw firmly by turning
clockwise so that the speaker cord cannot be pulled out
accidentally.
SPEAKER CONTROL AMPLIFIER
LEFT RC-980eX
SPEAKER
RIGHT
SWITCHES AND CONTROLS power, wnen me Indicaior goes off. it means the
unit is in the normal operating stale.
(1) Power Button The indicator glows when abnormally high temperature is built
Depress this bullon lo turn on the power In the unit. Press up inside the unit. In such a case, the indloalor will remain
the button a second time lo release it and lo cut off the power. on until me temperature inside me unit drops to a nonnaf level.
(2) Power Indicator When the indicator goes off, it indicates the unit has returned
Glows when power is fumed on with the power button. oberaling slate.
(3) Protectton Indicator
The indicator normally lights for several seconds upon lurn.

OPERATION
• Before commencing ogeralion, check lo see If sJI con*
nectione a/e properly made.
* Before luming on ihe power in the unit, always be sure
to turn down the preamplifier votume control to minimum.
1. Turn on ihe preamplifier,
2. Turn on the RS*990ex.
3. Reproduce a desired source, and raise the volume level
on the preampiifler.
HUM AND NOISE
In any high fidelity ineiallaiion, hum may be caused by the
irtterconnecbon of a lurr^table. tuner and amptifier, ar)d speak*
ers as the result ol wiring, dilfereni grounding or locations of
componertis.
If hum is experienced with your unit, disconrtect everything
bul ihe speakers from the unit. Plug in the turniabie and if
hum or howling appears, move the turnlaPte away Irom Ihe
speakers as much as possible.
Ncle hum may also be Induced by defective cable con nee-
tions or by running the cables too close lo strong AC field.
When your uhH picks up rtpise during the reception ol broad*
casts, causes are mostly dua to external objects such as
fluorescent lamps and iTouse appliances using motor or iher*
mostai, or others that may induce the r>ol$e.
Siher reiocaiing the unii away from ihe noise sources or using
an improved outdoor antenna may readily solve the problem.
In the event you cannot find the cause, consult your dealer
or a qualined eleci/ician.
PROTECTION CIRCUIT
The RB*990&X Incorporates thermal protector to prevent
accident or damage. If lor some reason the protection cir*
cult Is actevated, there will be a sudden cut'Off of sound from
the speakers, end the protection indicator will light up.
If no sound Is produced, the reason may be due to the lune*
tioning of the protection circuit. First, turn off the power and
disconnect the plug Irom the electrical outlet. Then locate and
remedy the cause of the trouble. When the thermal pro*
tecior is activated, the unit will start functioning automati¬
cally alter the temperature is lowered again.
If the protection circuit is activated again despite taking the
above action, cut off the power supply from your enure audio
system and consult your dealer or a qualified electrician.
Note: The protection circuit vrill normally operate to prevent
a popping noise Irom being generated upon turning on the
power. No sound is produced for several seconds after
turn*on.
SPECIFICATIONS
Continuous Powsf Output... 200 watts' per channel, min.
RMS both channels driven into
B ohms from 20 lo 20,000 Hz
with no more than 0.03%
total harmonic clsiortion.
DIN Power Oulpul. 330 walls per channel (1hHz,
a ohms, 1% TKD)
Peak Current.120 A
|0.1 ohms, 10 /.sec, 1 pulse)
Total Harmonic Distortion
(20 lo 20,000 Hz). No more lhan 0.03% (con¬
tinuous rated power output)
No mote than 0.01% (con¬
tinuous 1/2 rated power output)
No more than 0.02% (t watt
per channel power output,
a ohms)
jnlermoduration Distortion
(60 Hz ; 7 kHz-4:1).No more lhan 0.02% (con¬
tinuous rated power output)
No more lhan 0.02% (con¬
tinuous 1/2 rated power out pul)
No more than 0.02% (1 wait
per channel power output,
8 ohms)
Output.Speaker 8 ohms nominal
Damping Factor. 1,000 (20 lo 20,000 Hz, 8 ohms)
Input Sensitivity/
Impedance.l.OV/33 kohms
Freduency Response.4lo 100,000 Hz, tO.SdB,
-3-0 dB
Signal-to-Noise Patio
(IHFAnetwork).120 dB
Power Requirement.120V/60 Hz. 220 V/50 Hz,
240V/50 Hz Of 1 MV/SO Hz-
60 Hz (depending on
destinations)
Powar Consumption. 550 wans
Dimensions (overall). 440(W)x 120{H}x37S(D)mm
17-5/16'x4-23/32'x 14-3/4*
Weight (net).15.5 kg/34,1 lbs.
• Specifications and design subject lo possible modilicatlon
without notice.
' Measured pursuant to the Federal Trade Commission's
Trade Regulation Rule on Power Claims tor Amplifiers
{applicable to the U.S.A. only).