Rotel RB-1581 User manual

OwnerÊs Manual
使用说明书
RB-1581
Bridged Mono Power Amplifier
单声道后置放大器
RB-1581

2RB-1581 Bridged Mono Power Amplifier
WARNING: There are no user serviceable parts inside. Refer all
servicing to qualified service personnel.
WARNING: To reduce the risk of fire or electric shock, do not expose
the unit to moisture or water. Do not expose the unit to dripping or
splashing. Do not place objects filled with liquids, such as vases, on
the unit. Do not allow foreign objects to get into the enclosure. If the
unit is exposed to moisture, or a foreign object gets into the enclosure,
immediately disconnect the power cord from the wall. Take the unit
to a qualified service person for inspection and necessary repairs.
Read all the instructions before connecting or operating the component.
Keep this manual so you can refer to these safety instructions.
Heed all warnings and safety information in these instructions and on
the product itself. Follow all operating instructions.
Clean the enclosure only with a dry cloth or a vacuum cleaner.
Do not use this unit near water.
You must allow a minimum 10 cm or 4 inches of unobstructed
clearance around the unit.
Do not place the unit on a bed, sofa, rug, or similar surface that could
block the ventilation openings. If the unit is placed in a bookcase or
cabinet, there must be ventilation of the cabinet to allow proper cooling.
Keep the component away from radiators, heat registers, stoves, or
any other appliance that produces heat.
Rotel productsare designedto complywith international
directives on the Restriction of Hazardous Substances
(RoHS) in electrical and electronic equipment and
the disposal of Waste Electrical and Electronic
Equipment (WEEE). The crossed wheelie bin symbol
indicates compliance and that the products must be
appropriately recycled or processed in accordance
with these directives.
Important Safety Instructions
WARNING: The rear panel power cord connector is the mains power
disconnect device. The apparatus must be located in an open area
that allows access to the cord connector.
The unit must be connected to a power supply only of the type and
voltage specified on the rear panel. (USA: 120 V/60Hz,
EC: 230V/50Hz)
Connect the component to the power outlet only with the supplied
power supply cable or an exact equivalent. Do not modify the
supplied cable. A polarized plug has two blades, with one wider than
the other. A grounding plug has two blades plus a third grounding
prong. These are provided for your safety. Do not defeat grounding
and/or polarization safety provisions. If the supplied plug does not
fit your outlet, please consult an electrician for replacement of the
obsolete outlet. Do not use extension cords.
The main plug of the power cordset is a disconnect device of the
apparatus. In order to completely disconnect the apparatus from
the supply mains, the main plug of the power cordset should be
unplugged from the mains (AC) outlet. The stand-by LED indicator
will not be lit up to show the power cord is unplugged. The disconnect
device shall remain readily operable.
Do not route the power cord where it will be crushed, pinched, bent,
exposed to heat, or damaged in any way. Pay particular attention to the
power cord at the plug and where the cord exits the back of the unit.
The power cord should be unplugged from the wall outlet during a
lightning storm or if the unit is to be left unused for a long period
of time.
This apparatus shall be connected to a main socket outlet with a
protective earth connection.
Use only accessories specified by the manufacturer.
Use only with a cart, stand, rack, bracket or shelf
system recommended by Rotel. Use caution when
moving the unit in a stand or rack to avoid injury
from a tip-over.
Use Class 2 wiring for speaker connections to ensure proper insulation
and minimize the risk of electric shock.
Immediately stop using the component and have it inspected and/
or serviced by a qualified service agency if:
ĆThe power supply cord or plug has been damaged
ĆObjects have fallen or liquid has been spilled into the unit
ĆThe unit has been exposed to rain
ĆThe unit shows signs of improper operation
ĆThe unit has been dropped or damaged in any way
RB-1581
12
3
Pin Assignments
Balanced Audio (3 pole XLR):
Pin 1: Ground / Screen
Pin 2: In phase / +ve / Hot
Pin 3: Out of phase / -ve / Cold

3
Figure 1: Controls and Connections
RB-1581
SPEAKER IMPEDANCE
COMBINED LOAD
4 OHMS MINIMUM
1
38
7654
2

4RB-1581 Bridged Mono Power Amplifier
Figure 2: Hook-up Illustration
96+'1+8
HF
LF
OUTPUT
3UHDPS
LEFT RIGHT 12V TRIG OUT
96+'1+8
RB-1581
RB-1581
SPEAKER IMPEDANCE
COMBINED LOAD
4 OHMS MINIMUM
SPEAKER IMPEDANCE
COMBINED LOAD
4 OHMS MINIMUM
Bi-wire Connection
Single Wire Connection

5
Important Notes
When making connections be sure to:
Turn off all the components in the system before hooking up any components, including loudspeakers.
Turn off all components in the system before changing any of the connections to the system.
It is also recommended that you:
Turn the volume control of the amplifier all the way down before the amplifier is turned on or off.
Remarques importantes
Pendant les branchements, assurez-vous que :
Tous les maillons sont éteints avant leur branchement, quels quÊils soient, y compris les enceintes acoustiques.
Éteignez tous les maillons avant de modifier quoi que ce soit au niveau de leurs branchements, quels quÊils soient.
Il est également recommandé de :
Toujours baissez le niveau sonore via le contrôle de volume, avant dÊallumer ou dÊéteindre lÊamplificateur.
Wichtige Hinweise
Achten Sie beim Herstellen der Verbindungen auf Folgendes:
Schalten Sie alle Komponenten im System ab, bevor Sie Geräte (einschließlich Lautsprecher) anschließen.
Schalten Sie alle Komponenten im System ab, bevor Sie Anschlüsse im System verändern.
Ferner empfehlen wir, dass
Sie die Lautstärke herunterdrehen, bevor Sie den Verstärker ein- oder abschalten.
Notas Importantes
Cuando realice las conexiones, asegúrese de que:
Desactiva todos los componentes del equipo, cajas acústicas incluidas, antes de conectar cualquier nuevo componente en el mismo.
Desactiva todos los componentes del equipo antes de cambiar cualquier conexión del mismo.
También le recomendamos que:
Reduzca el nivel de volumen de su amplificador a cero antes de activarlo o desactivarlo.
Héél belangrijk
Bij het maken van de verbindingen:
Zorg dat niet alleen de RB-1581, maar de gehele installatie uitstaat, als nog niet alle verbindingen gemaakt zijn.
Zorg dat niet alleen de RB-1581, maar de gehele installatie ook uitstaat, als u verbindingen gaat wijzigen.
Wij raden u ook aan om
de volumeregelaar van de (voor)versterker geheel dicht te draaien (volkomen linksom) wanneer u uw eindversterker aan- of uitzet.
Note importanti
Quando effettuate i collegamenti assicuratevi di:
Spegnere tutti i componenti del sistema prima di collegare qualsiasi componente, inclusi i diffusori.
Spegnere tutti i componenti del sistema prima di modificare qualsiasi connessione nel sistema.
Vi raccomandiamo inoltre di:
Portare il volume a zero prima di accendere o spegnere lÊamplificatore.
Viktigt
Tänk på följande när du gör anslutningar:
Stäng av alla apparater i anläggningen innan du ansluter nya komponenter eller högtalare.
Stäng av alla apparater i anläggningen innan du ändrar någon anslutning.
Du rekommenderas också:
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6RB-1581 Bridged Mono Power Amplifier
(not digital) amplifiers are up to five times more efficient than our legacy
designs and still deliver power and performance. These products run cool,
give minimum wasted energy, are good for the environment and give better
sound too.
Finally, we have printed this brochure on recycled paper stock.
While we understand that these are small first steps, they are still important
ones. And we continue to pursue new methods and materials for a cleaner
and greener manufacturing process.
All of us at Rotel thank you for buying this product. We are sure it will bring
you many years of enjoyment.
A Word About Watts
The RB-1581 power output is quoted as 500 watts in 8 ohms load, when
it is operating at full power.
Rotel has chosen to specify the power output in this way because, in RotelÊs
experience, it gives the truest value of the receiver or amplifierÊs power
capability.
When comparing specifications for different products, you should be
aware that power output is often specified in other ways, so you may not
be comparing like with like.
For example, the power output may be quoted with only one channel
operating, giving a higher maximum figure. The highly regulated power
supplies of the Rotel amplifiers ensures that they will produce the full specified
power output to one or all channels.
A loudspeakerÊs impedance rating indicates the electrical resistance or
load it offers when connected to the amplifier, usually 8 ohms or 4 ohms.
The lower the impedance, the more power the speaker will need. In effect,
a 4 ohm speaker will require twice as much power as an 8 ohm speaker.
However, Rotel amplifiers are designed to work into any speaker impedance
between 8 and 4 ohms, and with all the channels working up to their full
power. Because the Rotel design is optimized for use with all channels
operating together, Rotel is able to specify the true power output for all
channels.
Getting Started
Thank you for purchasing the Rotel RB-1581 Bridged Mono Power Amplifier.
When used in a high-quality music or home theater system, your Rotel
product will provide years of musical enjoyment.
The RB-1581 is a high-power amplifer, providing the highest level of audio
performance. A massive power supply, premium components, and RotelÊs
Balanced Design ensure superb sound quality. High current capability allows
the RB-1581 to drive the most demanding loudspeakers.
A Few Precautions
WARNING: To avoid potential damage to your system, turn off ALL the
components in the system when connecting or disconnecting the loudspeakers
or any associated components. Do not turn the system components back on
Contents
Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 1: Controls and Connections 3
Figure 2: Hook-up Illustration 4
Important Notes 5
About Rotel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
A Word About Watts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
A Few Precautions 6
Placement 7
AC Power and Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
AC Power Input
8
7
Power Switch and Power Indicator
1
7
Protection Indicator
2
7
Trigger On/Off Mode Selector
5
7
12V Trigger Input and Output
4
7
Input Signal Connections
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Input Selector Switch 8
Speaker Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Speaker Selection 8
Speaker Wire Selection 8
Polarity and Phasing 8
Speaker Connection
6
8
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power Indicator Is Not Illuminated 9
Fuse Replacement
7
9
No Sound 9
Protection Indicator Is Illuminated 9
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
About Rotel
Our story began over 50 years ago. Over the decades, we have received
hundreds of awards for our products and satisfied hundreds of thousands
of people who take their entertainment seriously- like you!
Rotel was founded by a family whose passionate interest in music led them
to manufacture high-fidelity components of uncompromising quality. Through
the years, that passion has remained undiminished and the family goal of
providing exceptional value for audiophiles and music lovers, regardless
of their budget, is shared by all Rotel employees.
RotelÊs engineers work as a close team, listening to, and fine tuning, each
new product until it reaches their exacting musical standards. They are
free to choose components from around the world in order to make that
product the best they can. You are likely to find capacitors from the United
Kingdom and Germany, semiconductors from Japan or the United States,
while toroidal power transformers are manufactured in RotelÊs own factory.
We all have concerns about our environment. And, as more and more
electronics are produced and later discarded, it is especially important for
a manufacturer to do all it can to engineer products that have a minimum
negative impact on landfill sites and water tables.
At Rotel, we are proud to do our part. We have reduced the lead content
in our electronics by using special ROHS solder, while our new Class D

7
until you are sure all the connections are correct and secure. Pay particular
attention to the speaker wires. There must be no loose strands that could
contact the other speaker wires, or the chassis of the amplifier.
Please read this manual carefully. In addition to basic installation and
operating instructions, it provides valuable information on various RB-1581
system configurations as well as general information that will help you get
optimum performance from your system. Please contact your authorized
Rotel dealer for answers to any questions you might have. In addition, all
of us at Rotel welcome your questions and comments
Save the RB-1581 shipping carton and all enclosed packing material for
future use. Shipping or moving the RB-1581 in anything other than the
original packing material may result in severe damage to your amplifier.
If included in the box please fill out and send in the owner`s registration
card. Also be sure to keep the original sales receipt. It is your best record
of the date of purchase, which you will need in the event warranty service
is ever required.
Placement
Like all audio components that handle low-level signals, the RB-1581 can
be affected by its environment. Avoid placing the RB-1581 on top of other
components. Also avoid routing audio signal cables near power cords. This
will minimize the chance it will pick up hum or interference.
The RB-1581 generates heat as part of its normal operation. The heat sinks
and ventilation openings in the amplifier are designed to dissipate this
heat. The ventilation slots in the top cover must be open. There should be
10 cm (4 inches) of clearance around the chassis, and reasonable airflow
through the installation location, to prevent the amplifier from overheating.
Remember the weight of the amplifier when you select an installation location.
Make sure that the shelf or cabinet can support it. We recommend installing
the RB-1581 in furniture designed to house audio components. Such furniture
is designed to reduce or suppress vibration which can adversely affect
sound quality. Ask your authorized Rotel dealer for advice about component
furniture and proper installation of audio components.
AC Power and Control
AC Power Input
8
Your RB-1581 is configured at the factory for the proper AC line voltage in
the country where you purchased it (USA: 120 volts/60 Hz, Europe: 230
volts/50 Hz). The AC line configuration is noted on a label on the back panel.
NOTE: Should you move your unit to another country, it may be possible to
reconfigure it for use on a different line voltage. Do not attempt to perform
this conversion yourself. Opening the enclosure of the unit exposes you to
dangerous voltages. Consult a qualified service person or the Rotel factory
service department for information.
NOTE: Some products are intended for sale in more than one country and
as such are supplied with more than one AC cord. Please use only the cord
appropriate for your country/region.
Because of its relatively high power rating, the RB-1581 can draw considerable
current. Therefore, it should be plugged directly into a 3-pin polarized wall
outlet. Do not use an extension cord. A heavy duty multi-tap power outlet
strip may be used if it (and the wall outlet) is rated to handle the current
demanded by the RB-1581 and all the other components connected to it.
Be sure the power switch on the front panel of the RB-1581 is turned off
(in the „out„ position). Then, connect the supplied power cord to the Power
Connector
8
on the rear of the unit and the AC power outlet.
If you are going to be away from home for an extended period of time
such as a month-long vacation, it is a sensible precaution to unplug the RB-
1581 (as well as other audio and video components) while you are away.
Power Switch and Power Indicator
1
Press the front panel Power Switch button, to turn the unit on (or to activate
the 12V trigger). The Power Indicator light is illuminated when the unit is
on. Press the Power Switch button again to turn the unit off.
Protection Indicator
2
The RB-1581 features thermal and over-current protection circuits that protect
against potential damage in the event of extreme or faulty operating conditions.
Unlike many designs, the RB-1581Ês protection circuit is independent of
the audio signal and has no impact on sonic performance. Instead, the
protection circuit monitors the temperature of the output devices and shuts
down the amplifier if temperatures exceed safe limits.
Most likely, you will never see this protection circuitry in action. However,
should a faulty condition arise, the amplifier will stop playing and the
PROTECTION LED on the front panel will light.
If this happens, turn the amplifier off, let it cool down for several minutes,
and attempt to identify and correct the problem. When you turn the amplifier
back on, the protection circuit will automatically reset and the PROTECTION
LED should go out.
In most cases, the protection circuitry activates because of a fault condition
such as shorted speaker wires, or inadequate ventilation causing an
overheating condition. In very rare cases, highly reactive or extremely low
impedance speaker loads could cause the protection circuit to engage.
If the protection circuitry triggers repeatedly and you are unable to isolate
and correct the faulty condition, contact your authorized Rotel dealer for
assistance in troubleshooting.
Trigger On/Off Mode Selector
5
The amplifier provides the option for manual or automatic power on/off
operation. These modes are selectable using a toggle switch on the back panel.
With the switch in the +12V TRIGGER ON position, the amplifier is turned
on automatically when a 12V trigger signal is present at the 3.5 mm
Jack of TRIGGER IN on the rear panel. The amplifier will go into standby
mode if the +12V signal is not present. The front panel POWER SWITCH
overrides this function. It must be ON for the +12V trigger to work. Turning
the switch OFF cuts power to the amplifier, regardless of whether or not a
trigger signal is present.
12V Trigger Input and Output
4
The jack labeled IN is for connecting the 3.5mm Plug/Cable carrying a
+12 volt trigger signal to turn the amplifier on and off. To use this feature
the toggle switch must be set to the ON position. This input accepts any
control signal (AC or DC) ranging from 3 volts to 30 volts.

8RB-1581 Bridged Mono Power Amplifier
The jack labeled OUT is for connecting another 3.5mm plug/cable to
provide a 12V trigger signal to other components. The 12V output signal is
available whenever a +12 volt trigger signal is applied to the IN connector.
Input Signal Connections
3
See figure 2
NOTE: To prevent loud noises that neither you nor your speakers will
appreciate, make sure the system is turned off when you make any
signal connections.
The RB-1581 provides two types of input connections · unbalanced
RCA type connections as found on nearly all audio equipment as well as
balanced XLR connections.
Select high quality audio interconnect cables. Connect each of the outputs
from the preamplifier or signal processor to the corresponding input of the
amplifier.
Input Selector Switch
A toggle switch in the rear panel selects the type of input signal to use.
Select the correct inputs to use with this flip switch.
NOTE: You should choose only one method of analog connection from
a source component to RB-1581. Do not connect both the RCA and
XLR outputs of a source component to the RB-1581 at the same time.
Speaker Outputs
See Figure 2
Speaker Selection
The nominal impedance of the loudspeaker(s) connected to the RB-1581
should be a minimum of 4 ohms. When driving multiple pairs of speakers
connected in parallel, the effective impedance the amplifier sees is cut in half.
For example, when driving two pair of 8 ohm speakers, the amplifier sees
a 4 ohm load. When driving multiple speakers in parallel, select speakers
with a nominal impedance of 8 ohms or higher.
Speaker Wire Selection
Use insulated two-conductor stranded wire to connect the RB-1581 to the
speakers. The size and quality of the wire can have an audible effect on the
performance of the system. Standard speaker wire will work, but can result in
lower output or diminished bass response, particularly over longer distances.
In general, heavier wire will improve the sound. For best performance, you
may want to consider special high-quality speaker cables. Your authorized
Rotel dealer can help in the selection of cables for your system.
Polarity and Phasing
The polarity --- the positive/negative orientation of the connections --- for every
speaker and amplifier connection must be consistent so all the speakers will
be in phase. If the polarity of one connection is mistakenly reversed, bass
output will be very weak and stereo imaging degraded. All wire is marked
so you can identify the two conductors. There may be ribs or a stripe on the
insulation of one conductor. The wire may have clear insulation with different
color conductors (copper and silver). There may be polarity indications
printed on the insulation. Identify the positive and negative conductors and
be consistent with every speaker and amplifier connection.
Speaker Connection
6
See Figure 2
Turn off all the components in the system before connecting the speakers.
The RB-1581 has two pairs of color-coded binding posts on the back panel.
These connectors accept bare wire, connector lugs, or dual banana type
connectors (except in European Community countries where their use is
not permitted).
Route the wires from the RB-1581 to the speakers. Give yourself enough slack
so you can move the components to allow access to the speaker connectors.
If you are using dual banana plugs, connect them to the wires and then plug
into the backs of the binding posts. The binding posts should be screwed
in all the way (clockwise).
If you are using terminal lugs, connect them to the wires. If you are attaching
bare wires directly to the binding posts, separate the wire conductors and
strip back the insulation from the end of each conductor. Be careful not
to cut into the wire strands. Unscrew (turn counterclockwise) the binding
post. Place the connector lug or wire around the binding post shaft. Turn the
binding post clockwise to clamp the connector lug or wire firmly in place.
NOTE: Be sure there are no loose wire strands that could touch adjacent
wires or connectors.

9
Troubleshooting
Most difficulties in audio systems are the result of poor or wrong connections,
or improper control settings. If you encounter problems, isolate the area
of the difficulty, check the control settings, determine the cause of the fault
and make the necessary changes. If you are unable to get sound from the
RB-1581, refer to the suggestions for the following conditions:
Power Indicator Is Not Illuminated
No main power to the RB-1581. Check AC power connections at the
amplifier and the AC outlet. Check the front panel power switch. Make
sure that it is set to the ON position.
Fuse Replacement
7
If everything checks out correctly and you still cannot get the amplifier to turn
on, check for a blown fuse. Disconnect the AC from the wall and remove
the fuse holder
7
on the back panel. If the fuse is blown, replace with a
new fuse and try again.
Note: Make sure that the power cord is disconnected from the wall before
checking or replacing the fuse. Replace only with the identical size and type
fuse (3AG 125V 12A for U.S. version or 5ST6.3 for European version).
No Sound
If the amp is getting AC power, but is producing no sound, check the
PROTECTION INDICATOR on the front panel. If lit, see below. If not, check
all of your connections and control settings on associated components.
Protection Indicator Is Illuminated
The front panel PROTECTION INDICATOR lights when the RB-1581
protection circuits have shut off the amplifier. Typically, this occurs only
when the ventilation openings are blocked, when there is faulty speaker
wiring, or after a period of extreme use. Turn off the system and wait for
the amp to cool. Then push the front panel power switch in and out to reset
the protection devices. If the problem is not corrected or reoccurs, there is
a problem with the system or the amplifier itself.
Specifications
Continuous Power Output
Continuous Power Output 500 watts
(20-20k Hz, <0.09%, 8 ohms)
Total Harmonic Distortion
Total Harmonic Distortion (20Hz - 20kHz, 8 ohms) < 0.03%
Intermodulation Distortion
Intermodulation Distortion (60Hz:7kHz, 4:1) < 0.03%
Damping Factor
Damping Factor (20Hz-20kHz, 8ohms) 800
Input Impedance/Sensitivity
Input Impedance/Sensitivity
Unbalanced 12k ohms/ 1.6 volts
Balanced 100k ohms/ 2.5 volts
Amplifier Gain
Amplifier Gain
Unbalanced 32 dB
Balanced 28 dB
Frequency Response
Frequency Response (μ1db) 10 Hz - 100k Hz
Speaker Impedance
Speaker Impedance 4 ohms minimum
Power Requirements
Power Requirements
USA: 120 volts, 60 Hz
Europe: 230 volts, 50 Hz
Power Consumption
Power Consumption 550 watts
Dimensions
Dimensions (W x H x D) 431 x 144 x 407 mm
17 x 5
7/8x 16 ins
Front Panel Height
Front Panel Height 3U/132.6mm/5 1/4ins
Weight
Weight (net) 17.1 kgs, 37.62 lbs
All specifications are accurate at the time of printing.
Rotel reserves the right to make improvements without notice.
Rotel and the Rotel HiFi logo are registered trademarks of The Rotel Co., Ltd.,Tokyo, Japan.

10 RB-1581 单声道后置放大器
警告:机内无客户可以维修的部件。请合资格
维修人员维修。
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置于潮湿环境中或水中。不要将本产品置于滴水
或溅水环境中。不要将含有液体的物件(例如花
瓶)放在本产品上。不要让异物进入本产品外壳
内。如果本产品进入潮湿环境中,或异物进入本
产品内,立即从墙上拔掉电源线。将本产品送交
合资格维修人员检查或进行必要的维修。
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请保留本手册,以便阅读这些安全说明。
请留意这些说明和产品上的所有警告或安全信
息。请遵从操作说明。
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不要在接近水的地方使用本产品。
本产品周围最少应有10cm或4in.的间隙。
不要将本产品置于床上、沙发、垫子或类似的
物体上,以防堵塞通风口。如果将本装置放在
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器具。
ᆩᇀெࡔĂధٷĂഄࢃጚ๑ᆩڦںݛă
ၭ႐ǖՆ௨ةۉLj൩ೌ֭ཀྵܔጚ֭ፗăྜඇ֭ă
ጀᅪǖྺՆ௨ةۉLj൩֭ཀྵፌٷDŽDžڦఫೌDŽཀྵDž֭
֭ፗ၎ᆌ܋ժ֭ڟڹă
ԨՔᆩᇀ༵ႝᆩࢽLjԨׂాᆶ࿄ᇹڦ
ླ၃ۉუLjీᆅዂةۉޅ၃ă
Ք༵ႝᆩࢽፏٗԨ֩ໜ࿔ዐڦ֡
ፕࢅྼࢺDŽྼႪDžኸᆅă
洛得产品符合电气和电子设备限制有
害物质(RoHS)以及处理废旧电气和
电子设备(WEEE)的国际指令。带
叉形符号的轮式垃圾箱标志指合乎规
定,且该产品应根据这些指令以适当
的方法进行回收或处理。
重要安全说明
警告:后面板上的电源线接头是主电源断开装
置。应该将本机放在可拔插电源线接头的开放
的地方。
只能将本产品连接到后面板指定的型号和
电压的电源上。(美国:120V/60Hz,欧
洲:230V/50Hz,中国:220V/50Hz)
只能用本产品提供的电源线或严格等同的电源
线将本产品连接到电源插座上。不得更改随本
产品提供的电源线。两极插头有两个插刀,其
中一个插刀比另一个宽。接地插头有两个插刀
和第三个接地插刀。这些都是为了您的安全。
不得违反接地和两极安全规定。如果随本产品
提供的插头与您的插座不匹配,请咨询电工更
换陈旧的插座。不要使用延长线。
电源电缆的主插头是本产品的断电装置。要将
本产品从电源完全断开,应从主(交流)插座
上拔下电源电缆的主插头。拔掉电源线后,待
机指示灯熄灭。断路装置保持随时可操作状态。
不要使用变形的、收缩的、弯折的或损坏的,
电源线,不要将电源线置于热源附近。请特别
留意插头处和本装置后面的电源线。
雷暴天气中或本装置长时间不使用时,应将电
源线从墙上插头中拔出。
应当将本设备连接到带保护接地连接的电源插
座中。
只能使用制造商指定的附件。
只能使用洛得推荐的机架、立架或支
架。在支架或机架上移动本装置时,
请小心避免翻侧。
使用2类电线连接音箱,以确保正确的安装及将
触电风险减至最低。
在下列情况下,立即停止使用本装置,并请合
格维修机构检测和维修:
Ć 电源线或插头损坏
Ć 异物或液体进入进装置中
Ć 本装置遭受雨淋
Ć 本装置显示不正确操作的迹象
Ć 本装置跌落或以任何方式被损坏
RB-1581
12
3
引脚分配
平衡音频(3个平衡极点)
脚1:地极/屏蔽
脚2: 同相/+正极/热
脚3:异相/-负极/冷
ጀ!!ᅪ
ၭ႐ǖ൩ကٶ߃Ljᅜݞةۉླ၃ăాᆩࢽ
ྼႪևLjྼႪ߾ፕᆌᆯࢇጨ߭ྼႪටᇵႜă
൩ကٶLjᅜݞةۉƽ

11
RB-1581 单声道后置放大器
图1:控制和连接
RB-1581
SPEAKER IMPEDANCE
COMBINED LOAD
4 OHMS MINIMUM
1
38
7654
2

12 RB-1581 单声道后置放大器
图2:连接图解
HF
LF
OUTPUT
മዃݣٷഗ!
LEFT RIGHT 12V TRIG OUT
ᅼၒ
ᅼၒ
RB-1581
RB-1581
SPEAKER IMPEDANCE
COMBINED LOAD
4 OHMS MINIMUM
SPEAKER IMPEDANCE
COMBINED LOAD
4 OHMS MINIMUM
ມ၍থ
ڇ၍থ
重要注意事项
进行连接时,请确保:
连接任何设备(包括音箱)之前,应关闭系统中所有设备的电源。
改变系统的任何连接之前,应关闭系统中所有设备的电源。
我们还建议您:
打开或关闭放大器之前,将放大器的音量控制调到最低。

13
RB-1581 单声道后置放大器
虽然我们知道这些事情微不足道,但它们对环保仍然非常重要。我们会继
续寻找新的方法和材料,开发更加清洁、更加环保的制造工艺。
洛得的全体同仁感谢您购买本产品。我们深信,本产品将为您带来数年
的美妙享受。
功率简介
负载8欧姆、以最大功率运作时,RB-1581的额定功率输出为500W。洛得
采用这种方式标注功率输出是由于,依照洛得的实践,它能传输给接收器
或功放器最真实的数值。
与其它产品的技术参数相比,您会发现它们通常以其它方式标注功率输出,
所以您不能以这种方式进行比较。例如,它们提供的功率输出可能只是一
个声道工作时的功率输出,从而给出一个更高的最大数值。
音箱的额定阻抗表示它们连接到放大器时提供的电阻或负荷,通常为8Ω或
4Ω。阻抗越低,音箱需要的功率更高。实际上,一只阻抗为4Ω的音箱所
需要的功率为8Ω音箱的两倍。
但是,洛得放大器的设计可使用阻抗介于8Ω和4Ω之间的任何音箱,所有
声道均可以最大功率运作。基于对所有声道同时工作进行了设计优化,洛
得能够对所有声道标定真实的功率输出。
开始使用
感谢您购买洛得RB-1581单声道后置放大器。配合高质量的音乐音频系统
使用,本装置可为您提供多年的音乐享受。
RB-1581是一款高功率的后置放大器,提供最高水平的音质表现。大功率
电源、优质的元件以及洛得的平衡设计理念共同确保上乘的音质。大电流
输出能力可使RB-1581轻松驱动要求最为严格的音箱。
几点注意事项
警告:要避免可能造成系统的损坏,进行连接或断开音箱或相关组件之前
应关闭所有系统组件。确保所有连接均正确和安全后再开启系统组件。
请特别注意音箱线。确保没有松开的线束与其它音箱的电线或放大器的
机架接触。
请仔细阅读本手册。除了基本安装和操作说明外,本手册还提供了关于
RB-1581系统设置的资料以及一般信息,帮助您优化系统的性能。如果您
遇到任何问题,请联络洛得授权经销商。另外,洛得全体同仁欢迎您提
出问题或建议。
请保存好RB-1581的包装箱和包装材料,以备日后使用。用非原包装材料
运输或移动RB-1581可能会严重损坏放大器。
包装中若有用户注册卡,请填写并寄回给我们。另请保留原始销售收据。
它是购买日期的最佳记录,您日后需要保修时会用到它。
放置
跟所有处理低电平信号的音响设备一样,RB-1581也会受环境的影响。避
免将RB-1581放在其它设备的上面。也要避免将音频信号线置于电源线附
近。这可将噪音或受干扰的机会降至最低。
RB-1581在正常工作过程中会产生热量。放大器上的散热器和通风口用于排
出热量。上盖的通风口应该打开。为防止放大器过热,机身周围应有10厘
米(4英寸)的间隙,且安装位置应有适度的气流通过。
目录
重要安全说明 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
图1:控制和连接 11
图2:连接图解 12
重要注意事项 12
关于洛得 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
功率简介 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
开始使用 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
几点注意事项 13
放置 13
交流电源和控制 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
交流电源输入
8
14
电源开关和电源指示灯
1
14
保护指示灯
2
14
触发模式选择开关
5
14
12V触发输入和输出
4
14
输入信号连接
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
输入选择开关 14
音箱输出 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
音箱选择 14
音箱线选择 14
极性和相位 14
音箱连接
6
15
故障排除 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
电源指示灯不亮 15
更换保险丝
7
15
没有声音 15
保护指示灯亮 15
技术参数 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
关于洛得
洛得已有超过50年的历史。几十年来,我们的产品已赢得数百次奖项,满
足了无数对娱乐有着严肃态度的人士-比如您。
洛得是一个家族公司,他们对音乐的激情让他们致力于制造高品质的高保
真音响设备。多年以来,这种激情丝毫未减,而为不同预算的高保真音响
发烧友和音乐爱好者提供超值产品的目标,是洛得所有员工的共同追求。
洛得的工程师紧密协作,认真倾听并精确调谐每个新产品,直到其符合苛
刻的音乐标准。他们从世界各地挑选部件,以令其产品尽善尽美。您可能
会发现英国和德国生产的电容器、日本和美国产的半导体,以及洛得自己
工厂制造的环形功率变压器。
我们十分关注环境。随着越来越多的电子产品出现,随后被废弃,制造
商竭尽所能设计对垃圾填埋场和地下水位带来最低负面影响的产品就显
得尤为重要。
在洛得,我们做到了这一点,我们对此深感自豪。通过使用特殊的ROHS焊
料,我们降低了电子产品中的铅含量,同时,我们最新的D类(非数码)放
大器的效率是传统设计的五倍之多,同时仍可提供大功率和很高的性能。
这些产品运行时温度低,能源浪费少,不损害环境,并带来更好的音质。
最后,我们用可回收的纸张印刷本手册。

14 RB-1581 单声道后置放大器
选择安装地点时应考虑放大器的重量。请确保机架或机柜能够承载本设备
的重量。本公司建议将放大器安装在为安装音响器材设计的家具内。这些
家具可以降低或减少可能对声音质量产生负面影响的振动。设备家具和音
频设备的正确安装方法,请咨询授权洛得经销商。
交流电源和控制
交流电源输入
8
RB-1581出厂时已设置为您购买本产品所在国家的交流电压(美国:120
V/60Hz AC,或欧洲:230 V/50 Hz AC,中国:220V/50Hz AC)。交
流电压配置标注在后面板的标签上。
注意:如果将RB-1581带到另一个国家,可能需要重新设置以使用不同的
电压。不要试图自行进行转换。打开放大器的外壳会有触电危险。请咨询
合资格的维修人员或洛得工厂服务部门寻求帮助。
注意:有些产品将出售于多个国家,因此提供了多条AC电源线,请选择
一条适用于您国家/地区的电源线。
由于RB-1581的高电源功率,它会产生大量电流。因此,应该将本设备直
接插到墙上的三极插座。不要使用延长线。如果大功率多插孔插线板(
和墙插座)可以承受RB-1581和所有插到上面的其它器材,则可以使用多
插孔插线板。
请确保RB-1581前面板上的电源开关已关闭(位于弹出的位置)。然后,
将电源电缆连接到放大器背面的电源连接器
8
及交流电源插座上。
如果您将要离家较长时间,例如一个月,离开前请务必拔下RB-1581(和
其它音频视频设备)的电源插头。
电源开关和电源指示灯
1
要打开放大器的电源(或激活12V 触发器),将本开关按入。电源打开时,
电源按键周围的指示灯会变亮。要关闭放大器,再次按下按键将其复位。
保护指示灯
2
在过度或错误操作的情况下,热保护电路和过流保护功能会保护放大器免
受可能的损坏。不同于许多设计,RB-1581的保护电路独立于音频信号,对
音质表现没有影响。相反,保护电路监控输出装置的温度,如果温度超出
安全限度,将关闭放大器。
如果出现故障情况,放大器将停止运作,前面板上的保护指示灯将会点亮。
发生这种情况时,关闭放大器电源,让其冷却几分钟,并尝试确定及解
决该问题。重新打开放大器时,保护电路自动重置,保护指示灯熄灭。
大多数情况下,保护电路由于错误情况例如音箱电线短路或通风不畅引起
温度过高而激活。在极罕见的情况下,高度灵敏的或太低的音箱阻抗负载
可能造成保护电路介入。
如果保护电路重复触发,而您无法确定和解决故障,请联络授权洛得经销
商寻求帮助,解决问题。
触发模式选择开关
5
RB-1581提供手动或自动开/关机操作的选择。该模式可以通过后面板上
的开关进行选择。
本开关置于+12V TRIGGER(12V触发信号)ON(开)的位置时,如果
向后面板标注TRIGGER IN(触发信号输入)的3.5毫米插孔施加12V触发
信号,则放大器会自动打开。失去该12V触发信号,放大器则会进入无信
号的待机状态。要让12V触发开关工作,前面板上的POWER SWITCH(
电源开关)应位于ON(开)的位置。将开关置于OFF(关)的位置将切
断放大器电源,无论触发信号是否存在。
12V 触发输入和输出
4
标记为 IN的插孔用于连接带有+12V触发开关信号的3.5毫米插头/电缆。
要使用本功能,触发开关应设置到ON(开)的位置。本接入接口接受3V
至30V的任何控制信号(交流或直流)。
标记为OUT的插孔用于连接为其它设备提供12V触发信号的3.5毫米插
头/电缆。向IN连接口施加+12V触发信号时,该接口提供12V输出信号。
输入信号连接
3
见图2
注意:要避免高噪声对您和音箱的影响,进行任何信号连接之前,应关
闭所有系统组件。
RB-1581提供两种输入连接--几乎所有音频设备上都有的非平衡(RCA)型
连接,以及平衡(XLR)型输入连接。
请选用高质量的音频互连电缆。将前置放大器或信号处理器的每个输出连
接到RB-1581相应的输入连接。
输入选择开关
RB-1581后板的切换开关可选择使用输入信号的类型。用这个滑片开关选
择正确的输入。
注意:请只选用一种模拟方式连接RB-1581,不可同时使用RCA和XLR
连接。
音箱输出
见图2
音箱选择
我们建议在RB-1581上使用标称阻抗为4Ω或以上的音箱。驱动多对并行
配置的音箱时,你应该注意某些事项,因为放大器的有效阻抗被减半。例
如,驱动两对8Ω的音箱时,放大器的负载为4Ω。驱动多对并联联接的音
箱时,建议选用额定阻抗为8Ω以上的音箱。
音箱线选择
使用绝缘的双导线连接RB-1581和音箱。电线的大小和质量可能会对系统
的性能产生明显的效果。标准的音箱线也能用,但是可能会导致输出降低
或减少低音响应,尤其是在距离较远的情况下。通常,重量更重的线会提
升音质。为得到最佳效果,您可能需要考虑特别的高质量音箱电缆。洛得
授权经销商可以帮助您为您的系统选择合适的电缆。
极性和相位
每个音箱的极性,即连接的正/负方向(+/-)和放大器连接应保持一致,
以确保所有音箱在相同相位上。如果一个连接接反,低音输出会非常微弱,
立体声效果会降低。所有音箱线上均有标记,您可以区别两根导线。在一
股导线的绝缘套上可能有小标签。电线绝缘套内的导线可能有不同颜色(
铜或银)。绝缘上可能印有极性标记。找到正负导线,并确保每个音箱和
放大器的连接一致。

15
RB-1581 单声道后置放大器
音箱连接
6
见图2
连接音箱前请关闭系统中所有设备的电源。放大器的后板上有以颜色区分
的音箱接线柱。这些接线柱可以连接裸线或接线插片或双“香蕉”型接头
(欧盟国家不允许使用)。
将电缆从放大器连接到音箱上。要留有足够的余地,以便可以移动设备以
连接到音箱接线柱上。
如果您使用香蕉型插头,先将插头接到线上然后插到接线柱后面。应拧紧
音箱接线柱上的套环(顺时针)。
如果使用接线插片,将其连接到电线上。如果您直接将裸线连接到接线柱
上,请分开电线的导线,并自每根导线的端头将绝缘剥去。请小心不要将
导线切断。将接线柱的套环拧开(逆时针方向)。将接线片或导线绕在接
线柱轴上。顺时针拧紧套环,固定接线片或线头。
注意:请确保没有松开的线束与邻近的电线或导线接触。
故障排除
音响系统的多数故障是由于错误连接或控制设置不正确引致。如果您遇到
问题,请屏蔽有问题的区域,检查控制器设置,确定故障原因并进行必要
的修正。如果放大器仍然没有声音,请参考以下状况的建议:
电源指示灯不亮
没有连接电源。请检查放大器和AC插座的电源连接。检查前面板电源开
关,确保开关处于开(ON)的位置。
更换保险丝
7
如果检查后一切正常,但仍然无法开机,请检查保险丝。断开电源,拆开
后面板的保险丝盖子
7
。如果保险丝烧断了,请更换新的保险丝再试。
注意:在检查和更换保险丝前,确保电源已从插座上拔开。用相同大小和
类型规格的保险丝更换(美国3AG 125V 12A,欧盟5ST6.3)。
没有声音
如果放大器已连接电源,但仍没有声音,请检查前面板的保护指示灯。
如果指示灯亮,则参见下文。如果灯没亮,请检查关联设备的所有连接
和控制设置。
保护指示灯亮
RB-1581保护电路关闭放大器后,前面板的保护指示灯亮。通常,在通风
口堵塞,音箱连接错误或长时间过度使用的情况下才会出现这种情况。
关闭系统,等待放大器冷却。然后按下并按出前面板上的电源开关重置
保护装置。如果问题仍未得到解决或再次出现,则系统或放大器有故障。
技术参数
连续功率输出 500 W
(20-20k Hz, <0.09%, 8Ω)
总谐波失真 (20Hz - 20kHz, 8Ω) < 0.03%
互调失真 (60Hz:7kHz, 4:1) < 0.03%
阻尼系数 (20Hz-20kHz, 8Ω) 800
输入阻抗/灵敏度
非平衡(RCA) 12k Ω/ 1.6 volts
平衡(XLR) 100k Ω/ 2.5 volts
增益
非平衡(RCA) 32 dB
平衡(XLR) 28 dB
频率响应 (μ1db) 10 Hz - 100k Hz
音箱阻抗 最低4Ω
电源要求
美国 120 V, 60 Hz
欧洲 230 V, 50 Hz
中国 220 V, 50 Hz
功率消耗 550 W
尺寸(宽x高x深) 431 x 144 x 407 mm
17 x 5
7/8x 16 ins
前面板高度 3U/132.6mm/5 1/4ins
重量(净重) 17.1 kgs, 37.62 lbs
本手册印刷时所有参数均属精确。
洛得保留修改的权利,恕不另行通知。
Rotel和Rotel Hi-Fi标记均属日本东京洛得有限公司的注册商标。

082 OMRB-1581-21-B 111213 English Ć中文
中国洛得
珠海保税区洛得电子有限公司
地址:中国广东省珠海市珠海保税区第27号区域
电话:0756-8936088
传真:0756-8936222
The Rotel Co. Ltd.
日本洛得
Tachikawa Bldg. 1F.,
2-11-4, Nakane, Meguro-ku,
Tokyo, 152-0031
Japan
Rotel of America
美国洛得
54 Concord Street
North Reading, MA 01864-2699
USA
电话Phone: +1 978-664-3820
传真Fax: +1 978-664-4109
Rotel Europe
欧洲洛得
Dale Road
Worthing, West Sussex BN11 2BH
England
电话Phone: + 44 (0)1903 221 761
传真Fax: +44 (0)1903 221 525
Rotel Deutschland
德国洛得
Vertrieb: B&W Group Germany GmbH
Kleine Heide 12
D-33790 Halle/Westf., Deutschland
电话Phone: 05201 / 87170
传真Fax: 05201 / 73370
电邮E-Mail: [email protected]
www.rotel.com
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