Sherwood Stereo System RX 4503 User Manual

cover 2008.8.12 3:44 PM 페이지 2  
OPERATING INSTRUCTIONS  
RX-4503  
AM/FM STEREO RECEIVER  
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Introduction  
READ THIS BEFORE OPERATING YOUR UNIT  
This symbol is intended to alert the user to the presence  
of uninsulated "dangerous voltage" within the product's  
enclosure that may be of sufficient magnitude to  
constitute a risk of electric shock to persons.  
TO REDUCE THE RISK OF ELECTRIC SHOCK,  
DO NOT REMOVE COVER (OR BACK). NO  
USER-SERVICEABLE PARTS INSIDE. REFER  
SERVICING TO QUALIFIED SERVICE  
PERSONNEL.  
CAUTION :  
WARNING  
This symbol is intended to alert the user to the presence  
of important operating and maintenance (servicing)  
instructions in the literature accompanying the appliance.  
: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,  
DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.  
Caution regarding installation  
Note : For heat dispersal, do not install this unit in a confined space such as a bookcase or similar enclosure.  
Do not block ventilation openings or stack other equipment on the top.  
Note to CATV System Installer :  
This reminder is provided to call the CATV system installer’s attention to Article 820-40 of the NEC that provides guidelines for proper  
grounding and, in particular, specifies that the cable ground shall be connected to the grounding system of the building, as close to the point  
of cable entry as practical.  
FCC INFORMATION  
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These  
limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and  
can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio  
communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful  
interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct  
the interference by one or more of the following measures:  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.  
Consult the dealer or an experienced radio/TV technician for help.  
Caution : Any changes or modifications in construction of this device which are not expressly approved by the party responsible for compliance  
could void the user’s authority to operate the equipment.  
This Class B digital apparatus complies with Canadian ICES-003.  
Cet appareil numérique de la Classe B est conforme à la norme NMB-003 du Canada.  
FOR YOUR SAFETY  
CAUTION  
Leave a space around the unit for sufficient ventilation.  
Avoid installation in extremely hot or cold locations, or in an area  
that is exposed to direct sunlight or heating equipment.  
Keep the unit free from moisture, water, and dust.  
Do not let foreign objects in the unit.  
The ventilation should not be impeded by covering the ventilation  
openings with items, such as newspapers, table-cloths, curtains, etc.  
No naked flame sources, such as lighted candles, should be placed  
on the unit.  
Please be care the environmental aspects of battery disposal.  
The unit shall not be exposed to dripping or splashing for use.  
No objects filled with liquids, such as vases, shall be placed on the  
unit.  
U.S.A  
120 V  
CANADA  
Units shipped to the U.S.A and CANADA are designed for operation  
on 120 V AC only.  
Safety precaution with use of a polarized AC plug.  
However, some products may be supplied with a nonpolarized plug.  
: To prevent electric shock, match wide blade of  
plug to wide slot, fully insert.  
CAUTION  
: Pour éviter chocs électriques, introduire la lame  
ATTENTION  
• Do not let insecticides, benzene, and thinner come in contact with  
.
la plus large de la fiche dans la borne  
the set  
Never disassemble or modify the unit in any way.  
correspondante de la prise et pousser jusqu’ au  
fond.  
Notes on the AC power cord and the wall outlet.  
The unit is not disconnected from the AC power source(mains) as  
long as it is connected to the wall outlet, even if the unit has been  
turned off.  
To completely disconnect this product from the mains, disconnect  
the plug from the wall socket outlet.  
When setting up this product, make sure that the AC outlet you are  
using is easily acceptable.  
Disconnect the plug from the wall outlet when not using the unit for  
long periods of time.  
ENERGY STARis a U.S. registered mark. As an  
ENERGY STARPartner, Sherwood has  
determined that this product meets the ENERGY  
STARguidelines for energy efficiency.  
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CONTENTS  
• IMPORTANT SAFETY INSTRUCTIONS .............................................................................................................................. 3  
Introduction  
• READ THIS BEFORE OPERATING YOUR UNIT ................................................................................................................. 4  
System Connections ......................................................................................................................................................... 6  
Front Panel Controls ......................................................................................................................................................... 9  
Remote Controls ............................................................................................................................................................... 11  
• REMOTE CONTROL OPERATION RANGE ....................................................................................................................... 12  
• LOADING BATTERIES ....................................................................................................................................................... 12  
Operations  
• LISTENING TO A PROGRAM SOURCE ............................................................................................................................ 13  
• LISTENING TO RADIO BROADCASTS ............................................................................................................................. 17  
• RECORDING ....................................................................................................................................................................... 19  
• OTHER FUNCTIONS .......................................................................................................................................................... 19  
Troubleshooting Guide ................................................................................................................................................... 20  
Specifications .................................................................................................................................................................... 21  
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System Connections  
• Do not plug the AC input cord into the wall AC outlet until all connections are completed.  
• Be sure to observe the color coding when connecting audio, video and speaker cords.  
• Make connections firmly and correctly. If not, it can cause loss of sound, noise or damage to the receiver.  
1.  
CONNECTING ANTENNAS  
• Change the position of the FM indoor antenna until you  
get the best reception of your favorite FM stations.  
• A 75outdoor FM antenna may be used to further  
improve the reception. Disconnect the indoor  
antenna before replacing it with the outdoor one.  
• Place the AM loop antenna as far as possible from the receiver, TV set, speaker cords and the AC  
input cord and set it to a direction for the best reception.  
• If the reception is poor with the AM loop antenna, an AM outdoor antenna can be used in place of  
the AM loop antenna.  
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2.  
CONNECTING AUDIO COMPONENTS  
• The TAPE IN/OUT jacks can be connected to audio recording equipment such as a tape deck, an MD recorder, etc.  
• The AUX IN jacks can be connected to an additional components such as CD player, a tape deck, etc.  
3.  
CONNECTING EXTERNAL INs  
• Use these jacks to connect the corresponding analog  
outputs of 6 CH decoder or DVD player with 6 CH output  
for Dolby Digital or DTS, etc.  
(For details, see the operator's manual of the component  
to be connected.)  
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4.  
CONNECTING SUBWOOFER PRE OUT  
• To emphasize the deep bass sounds, connect a powered  
subwoofer.  
5.  
CONNECTING SPEAKERS  
• Usally SPEAKER A terminals are used for only a pair of  
speakers. When you have another pair of speakers,  
SPEAKER B terminals can be used.  
• Be sure to connect speakers firmly and correctly according to  
the channel(left and right) and the polarity(+ and -). If the  
connections are faulty, no sound will be heard from the  
speakers, and if the polarity of the speaker connection is  
incorrect, the sound will be unnatural and lack bass.  
Notes :  
• For safe amplifier operation, use the speakers with  
impedance of over 8Ω when you use only SPEAKER A or B  
terminals and use the speakers with impedance of over 16Ω  
when you use both SPEAKER A and B terminals.  
• Do not let the bare speaker wires touch each other or any  
metal part of this unit. This could damage this unit and/or the  
speakers.  
6.  
AC INPUT CORD  
• Plug the cord into a wall AC outlet.  
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Front Panel Controls  
1. POWER switch  
12. MUTE button/indicator  
2. POWER ON/STANDBY button  
3. STANDBY indicator  
13. SPEAKER A, B SELECTRO buttons  
14. TONE DIRECT button  
4. FLUORESCENT DISPLAY  
For details, see below.  
15. BASS UP/DOWN (▶/◀) buttons  
16. TREBLE UP/DOWN (▶/◀) buttons  
17. CHANNEL LEVEL UP/DOWN (▲/▼) buttons  
18. CHANNEL LEVEL button  
19. MEMORY button  
5. INPUT SELECTOR knob  
6. SOUND button  
7. BAND button  
8. TUNING UP/DOWN (▲/▼) buttons  
9. PRESET UP/DOWN (▲/▼) buttons  
10. MASTER VOLUME CONTROL knob  
11. HEADPHONE jack  
20. FRONT AUX IN jack  
For details, see next page.  
21. Bluetooth IN connector  
FLUORESCENT DISPLAY  
1. Input, frequency, volume level, operating information, etc.  
2. Sound mode indicators  
6. PRESET indicator  
7. SLEEP indicator  
8. TUNED indicator  
9. STEREO indicator  
3. DIRECT indicator  
4. Preset number, sleep time display  
5. MEMORY indicator  
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FRONT AUX IN JACK  
• The FRONT AUX IN jack can be connected to additional audio components such as an MP3 player, etc.  
Notes :  
• When connecting this jack to an MP3 player, etc., you should use the stereo mini cord, not a mono mini cord.  
• When not using the FRONT AUX IN jack and the Bluetooth IN connector, cover these with the supplied cap.  
Bluetooth IN CONNECTOR  
• If the Bluetooth IN connector is connected to Sherwood Audio Receiver  
BT-R7(sold separately) with Bluetooth wireless technology, you can  
enjoy music wirelessly with a music player featuring Bluetooth wireless  
technology such as MP3 player, mobile phone, etc..  
(For information on Sherwood Audio Receiver BT-R7, contact your  
dealer.)  
• The Bluetooth word mark and logos are registered trademarks owned by  
Bluetooth SIG, Inc. and any use of such marks by Sherwood  
Corporation is under license. Other trademarks and trade names are  
those of their respective owners.  
Note :  
• For safe operation, turn the power off before connecting or  
disconnecting the Audio Receiver BT-R7.  
10  
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Remote Controls  
11  
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REMOTE CONTROL OPERATION RANGE  
• Use the remote control unit within a range of about 7 meters (23  
feet) and angles of up to 30 degrees aiming at the remote sensor.  
LOADING BATTERIES  
1.  
Remove the cover.  
2.  
Load two batteries ("AAA" size, 1.5 V) matching the  
polarity.  
• Remove the batteries when they are not used for a  
long time.  
• Do not use the rechargeable batteries (Ni-Cd type).  
12  
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Operations  
LISTENING TO A PROGRAM SOURCE  
Before operation  
• Push the POWER switch.  
• This unit enters the standby mode and the STANDBY  
indicator lights up. This means that the receiver is not  
disconnected from the AC mains and a small amount of  
current is retained to support the operation readiness.  
• To switch the power off, push the POWER switch again.  
Then the power is cut off and the STANDBY indicator  
goes off.  
1. In the standby mode, turn the power on.  
• Each time the POWER ON/STANDBY button on the front  
panel is pressed, the receiver is turned on to enter the  
operating mode or off to enter the standby mode.  
• On the remote control, press the POWER ON button to  
enter the operating mode or press the STANDBY button to  
enter the standby mode.  
or  
• In the standby mode, if the INPUT SELECTOR button on  
the remote control is pressed, the receiver is turned on  
automatically and the desired input is selected.  
2. Switch the desired speakers on.  
• Then the corresponding speaker indication ("SPK A or B")  
is displayed and the sound can be heard from the  
speakers connected to the selected speaker terminals.  
• When using the headphones for private listening, press  
the corresponding SPEAKER button to switch off both A  
and B speakers.  
3. Select the desired input source.  
• Each time the INPUT SELECTOR knob is rotated, the  
input source changes as follows :  
• When selecting the EXTERNAL IN, 6 seperate analog  
signals from the component connected to this input pass  
through the tone and volume circuits only and can be  
heard from your speakers.  
TUNER  
(Frequency display)  
CD TAPE AUX  
EXT IN  
BT IN  
F AUX  
• These analog signals can be heard only, not recorded.  
• Each time the BAND button or the TUNER button is  
pressed, the band changes as follows:  
FM ST FM MONO AM  
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4. Operate the selected component for playback.  
5. Adjust the (overall) volume.  
6. To mute the sound.  
• Then the MUTE indicator will flicker.  
• To resume the previous sound level, press it again.  
or  
7. To listen with the headphones.  
• Be sure to switch off both A and B speakers.  
Note :  
• Be careful not to set the volume too high when using  
headphones.  
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Selecting a surround sound mode  
• Each time this button is pressed, the mode changes as  
follows :  
(DOLBY VS REF DOLBY VS WIDE) or <DOLBY HP>  
STEREO or 2CH DOWNMIXꢀ  
( ) : Possible only when listening via the speakers.  
< > : Possible only when listening via the headphones.  
: Possible only when selecting the EXTERNAL IN as an input source.  
• On the remote control, press the "  
" button or  
the STEREO button depending on whether listening in a  
surround mode or in the stereo mode.  
Surround sound modes  
• Dolby Virtual Speaker  
This mode creates a virtual surround sound field using as few as two front speakers and subwoofer, allowing you to  
experience listening from 5.1 channel speakers.  
* Dolby Virtual Speaker Reference("DOLBY VS REF")  
The width of the front sound image is defined by the actual distance between front speakers.  
* Dolby Virtual Speaker Wide("DOLBY VS WIDE")  
The width of the front sound image seems to extend beyond the front speakers.  
• Dolby Headphone("DOLBY HP")  
This mode simulates 5.1 channel surround sound, which allows you to enjoy 5.1 channel surround sound through 2 channel  
headphones, just like listening from 5.1 channel speakers.  
Dolby and the double-D symbol are registered trademarks of Dolby Laboratories.  
2CH downmix mode  
• This mode allows the multi-channel signals from the EXTERNAL INs to be mixed down into two front channels and to be  
reproduced through front speakers or headphones.  
Adjusting the channel level  
1. Select the desired channel.  
• Each time this button is pressed, the channel is  
selected as follows:  
FL  
(Front L)  
FR ( SW )  
(Front R) (Subwoofer)  
(
) : Possible only when listening via the speakers.  
• When the channel display disappears, press this button  
again.  
2. At each channel, adjust the level as desired.  
• The channel levels can be adjusted within the range of -15  
~ +15 dB.  
• In general, we recommend the level to be adjusted to 0 dB.  
3. Repeat the above steps 1 and 2 to adjust each channel level.  
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Adjusting the tone (bass and treble)  
1. Select the desired tone mode.  
• Each time this button is pressed, the tone mode is  
selected as follows :  
OFF : To listen to a program source without the tone effect.  
("DIR" indicator lights up.)  
ON : To adjust the tone for your taste.  
("DIR" indicator goes off.)  
Note :  
• When the EXTERNAL IN is selected as an input source,  
the TONE cannot be set to ON.  
When the TONE is set to ON to adjust the tone (bass and treble).  
2. Adjust the tone (treble and bass) as desired.  
• The tone level can be adjusted within the range of -12 ~  
+12.  
Notes :  
• Extreme settings at high volume may damage your  
speakers.  
• In general, the bass and treble levels are adjusted to 0.  
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LISTENING TO RADIO BROADCASTS  
Auto tuning  
1. Select the desired band.  
• Each time this button is pressed, the band changes as  
follows ;  
FM ST  
("ST" lights up)  
FM MONO  
("ST" goes off)  
AM  
• When FM stereo broadcasts are poor because of weak  
broadcast signals, select the FM mono mode to reduce  
the noise, then FM broadcasts are reproduced in  
monaural sound.  
2. Press the TUNING UP/DOWN buttons for more than 0.5 second.  
• The tuner will now search until a station of sufficient  
strength has been found. The display shows the tuned  
frequency and "TUNE".  
• If the station found is not the desired one, simply repeat  
this operation.  
• Weak stations are skipped during auto tuning.  
Manual tuning  
• Manual tuning is useful when you already know the frequency of the desired station.  
• After selecting the desired band, press the TUNING UP/ DOWN buttons repeatedly until the right frequency has been reached.  
Auto presetting  
• Auto presetting function automatically searches for FM stations only and store them in the memory.  
• While listening to FM radio broadcasts, press and hold down the MEMORY button for more than 2 seconds.  
• Then "AUTO MEM" flickers and this receiver starts auto  
presetting.  
• To stop auto presetting, press this button again.  
• Up to 30 FM stations can be stored.  
Notes:  
• FM stations of weak strength cannot be memorized.  
• To memorize AM stations or weak stations, preform  
"Manual presetting" procedure with using "Manual tuning"  
operation.  
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Manual presetting  
• You can store up to 30 preferred stations in the memory.  
1. Tune in the desired station with auto or manual tuning.  
2. Press the MEMORY button.  
• "MEM" is flickering for several seconds.  
MEM  
3. Select the desired preset number (1~30) and press the MEMORY button.  
• When using the NUMERIC buttons on the remote control.  
Examples) For “3” :  
For “15” :  
For “30” :  
• The station has now been stored in the memory.  
• When using the NUMERIC buttons, the station is stored  
automatically without pressing the MEMORY button.  
• A stored frequency is erased from the memory by storing  
another frequency in its place.  
• If “MEM” goes off, start again from the above step 2.  
4. Repeat the above steps1 to 3 to memorize other stations.  
MEMORY BACKUP FUNCTION  
The following items, set before the receiver is turned off, are memorized.  
• INPUT SELECTOR settings  
• Surround mode settings  
• Preset stations,etc.  
Tuning to preset stations  
• After selecting the tuner as an input source, select the desired preset number.  
• When using the NUMERIC buttons on the remote control.  
Examples) For “3” :  
For “15” :  
For “30” :  
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RECORDING  
• The analog signals from the EXTERNAL INs can be heard but cannot be recorded.  
• The volume and tone (bass, treble) settings have no effect on the recording signals.  
Recording with TAPE  
1. Select the desired input as a recording source except for TAPE.  
2. Start recording on the TAPE.  
3. Start play on the desired input.  
OTHER FUNCTIONS  
Operating the sleep timer  
• The sleep timer allows the system to continue to operate for a specified period of time before automatically shutting off.  
• To set the receiver to automatically turn off after the specified period of time.  
• Each time this button is pressed, the sleep time changes  
as follows:  
10 20 30 --- 90 OFF  
Unit : minutes  
• While operating the sleep timer, "  
" lights up.  
• When the sleep time is selected, the fluorescent display  
is dimly lit.  
Adjusting the brightness of the fluorescent display  
• Each time this button is pressed, the brightness of  
the fluorescent display changes as follows:  
ON dimmer OFF  
• In the display OFF mode, pressing any button will  
restore the display ON mode.  
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Troubleshooting Guide  
If a fault occurs, run through the table below before taking your receiver for repair.  
If the fault persists, attempt to solve it by switching the receiver off and on again. If this fails to resolve the situation,  
consult with your dealer. Under no circumstances should you repair the receiver yourself as this could invalidate  
the warranty.  
PROBLEM  
POSSIBLE CAUSE  
REMEDY  
• Connect the cord securely.  
• Check the outlet using a lamp or another  
appliance.  
No power  
• The AC input cord is disconnected.  
• Poor connection at AC wall outlet or the  
outlet is inactive.  
• Check the speaker connections.  
• Adjust the volume.  
No sound  
• The speaker cords are disconnected.  
• The volume is adjusted too low.  
• The MUTE button is pressed to ON.  
• Press the MUTE button to cancel the  
muting effect.  
• Press the SPEAKER A or B button to ON.  
• Select the desired input source correctly.  
• Make connections correctly.  
• Speakers are not switched on.  
• Incorrect selection of the input source.  
• Incorrect connections between the  
components.  
• Connect an antenna.  
Stations cannot be  
received  
• No antenna is connected.  
• The desired station frequency is not tuned  
in.  
• Tune in the desired station frequency.  
• Move the antenna and retry tuning.  
• Memorize the correct station frequency.  
• Memorize the stations again.  
• The antenna is in wrong position.  
Preset stations cannot be  
received  
• An incorrect station frequency has been  
memorized.  
• The memorized stations are cleared.  
• Connect an antenna.  
Poor FM reception  
• No antenna is connected.  
• The antenna is not positioned for the best  
reception.  
• Change the position of the antenna.  
Change the position of the antenna.  
Install an outdoor antenna.  
Continuous hissing noise  
during FM reception,  
• Weak signals.  
especially when a stereo  
broadcast is received.  
• Keep the receiver away from noise  
sources.  
Continuous or intermittent  
hissing noise during AM  
reception, especially at  
night.  
• Noise is caused by motors, fluorescent  
lamps or lightning, etc.  
• Install an outdoor AM antenna.  
• Make connections correctly.  
No recording  
• Incorrect selection between the  
components.  
• Operate each component correctly.  
• Incorrect operation of each component for  
playback and recording.  
• Replace the batteries.  
• Remove the obstacle.  
Remote control unit does  
not operate.  
• Batteries are not loaded or exhausted.  
• The remote sensor is obstructed.  
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Specifications  
AMPLIFIER SECTION  
Power output, stereo mode, 8 , THD 0.08 %, 40 Hz~20 kHz ............................................................... 2X100 W  
Total harmonic distortion, 8 , 100 W, 40 Hz~20 kHz ............................................................................... 0.02 %  
Intermodulation distortion  
60 Hz : 7 kHz= 4 : 1 SMPTE, 8 , 100 W .................................................................................................. 0.02 %  
Input sensitivity, 47 kΩ  
Line(CD,TAPE,AUX) ................................................................................................................................. 200 mV  
Signal to noise ratio, IHF “A” weighted  
Line(CD,TAPE,AUX) .................................................................................................................................... 96 dB  
Frequency response  
Line(CD,TAPE,AUX), 10 Hz~95 kHz .......................................................................................................... -3 dB  
Output level  
TAPE OUT, 2.2 k................................................................................................................................... 200 mV  
Bass/Treble control, 100 Hz/10 kHz ......................................................................................................... ±12 dB  
FM TUNER SECTION  
Tuning frequency range ................................................................................................................. 87.5~108 MHz  
Usable sensitivity, THD 3%, S/N 30 dB ................................................................................................. 16.25 dBf  
50 dB quieting sensitivity, mono/stereo ............................................................................................ 25.2/45.2 dBf  
Signal to noise ratio, 65 dBf, mono/stereo .............................................................................................. 67/66 dB  
Total harmonic distortion, 65 dBf, 1 kHz, mono/stereo ........................................................................... 0.6/0.7%  
Frequency response, 20 Hz~14 kHz ........................................................................................................... -3 dB  
Stereo separation, 1 kHz .............................................................................................................................. 35 dB  
Capture ratio .................................................................................................................................................. 4 dB  
IF rejection ratio ......................................................................................................................................... 105 dB  
AM TUNER SECTION  
Tuning frequency range ................................................................................................................. 520~1710 kHz  
Usable sensitivity .................................................................................................................................... 800 μV/m  
Signal to noise ratio ...................................................................................................................................... 51 dB  
Selectivity ..................................................................................................................................................... 30 dB  
GENERAL  
Power supply .................................................................................................................................. 120 V~ 60 Hz  
Power consumption ........................................................................................................................................ 2.5A  
Dimensions (W×H×D, including protruding parts) ............. 440×141×365mm(17-3/8×5-1/2×14-3/8 inches)  
Weight (Net) .................................................................................................................................. 8.3 kg(18.3 lbs)  
Note: Design and specifications are subject to change without notice for improvements.  
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cover 2008.8.12 3:44 PM 페이지 1  
RX-4503  
AM/FM STEREO RECEIVER  
5707-00000-120-0S  
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