RCA 10---Band Stereo Graphic Equalizer User manual

©1999 Tandy Corporation.
All Rights Reserved.
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Your RCA 10-Band Stereo Graphic
Equalizer gives you greater control over
your audio system’s sound. As you play or
record an audio source, you can tailor the
sound to suit your personal listening
preferences or to compensate for poor
recording quality, components, speaker
placement, or the room’s acoustics.
Your equalizer offers the following
features:
Stereo Image Enhancer – enhances the
stereo effect.
Spectrum Display — gives you a visual
display of the sound level of each
frequency band.
Tape Dubbing — lets you copy a tape
from one tape deck to the other.
Tape Monitoring — lets you listen to the
recorded sound.
Bypass — lets you play and record
without equalization.
EQ Record — lets you record equalized
and enhanced sounds while listening to
unmodified sounds.
Display Level Control — lets you adjust
the display to give you the best picture of
the sound levels for both the left and right
channels.
WARNING: To reduce the risk of fire or
shock hazard, do not expose this product to
rain or moisture.
CAUTION
RISK OF ELECTRIC
SHOCK. DO NOT OPEN.
CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK, DO NOT REMOVE
COVER OR BACK. NO USER-SERVICE-
ABLE PARTS INSIDE. REFER SERVIC-
ING TO QUALIFIED PERSONNEL.
This symbol is intended to alert
you to the presence of uninsu-
lated dangerous voltage within
the product’s enclosure that
might be of sufficient magnitude
to constitute a risk of electric
shock. Do not open the prod-
uct’s case.
This symbol is intended to
inform you that important oper-
ating and maintenance instruc-
tions are included in the
literature accompanying this
product.
!
!
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Follow these steps to connect the equalizer to your audio system.
Cautions:
• Use only shielded audio cable with phono-type connectors, available at your local
RadioShack store.
• Before you connect the equalizer, turn off all the components in your audio system and
unplug their power cords.
• Before you plug in the equalizer’s power cord, complete all the connections and be sure
the equalizer’s POWER button is set to the out position.
1. To connect the equalizer to your
receiver, connect the receiver’s left and
right TAPE OUT jacks to the equalizer’s
Land R MAIN IN jacks. Then connect
the equalizer’s Land R MAIN OUT jacks
to your receiver’s left and right TAPE IN
or TAPE MONITOR jacks.
2. You can connect a tape deck to each set
of tape jacks (TAPE 1 and TAPE 2) on
the back of the equalizer. To connect
each tape deck, connect the equalizer’s
Land R TAPE OUT jacks to the tape
deck’s left and right IN jacks. Then
connect the tape deck’s OUT jacks to
the equalizer’s Land R TAPE IN jacks.
3. Plug the equalizer’s power cord into
your receiver’s switched power outlet or
any standard AC outlet.
Warning: The equalizer’s power cord
has a polarized plug. To prevent electric
shock, do not use an extension cord or
other receptacle unless you can fully
and easily insert the plug’s blades.
4. Reconnect the other components’
power cords.
Tape Deck 2Tape Deck 1
Stereo Receiver
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Follow these steps to use the equalizer.
1. Turn the receiver’s volume control to its
lowest setting. Then set the receiver’s
tone controls to their center positions.
2. Set the equalizer’s slide controls to 0 dB
(center positions).
3. Be sure BYPASS and EQ RECORD are
set to the out position. If either is set to
the in position, press it to release it.
4. Press POWER to turn on the equalizer.
The SPECTRUM DISPLAY lights.
5. Select the receiver’s tape monitoring
feature.
6. Turnonthereceiver.Usingthereceiver’s
controls, select the audio source.
If the audio source is a tape deck, set
the appropriate TAPE MONITOR
button (1or 2) to the in position. If the
source is not a tape deck, be sure both
of the equalizer’s TAPE MONITOR
buttons are set to the out position.
7. Start the audio source and adjust the
receiver’s volume.
8. Adjust the equalizer’s slide controls for
the desired sound (see “Frequency
Controls”).
You can view the effect of the
adjustments on the SPECTRUM
DISPLAY.
Note: The display shows the sound
levels of the audio source you are
listening to. For example, if you are
dubbing from one tape deck to another
but listening to the CD player, the
display shows the sound levels of the
CD player.
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The equalizer has separate LEFT channel
and RIGHT channel controls so you can set
the sound differently for your left and right
speakers.
Equalizer Slide Controls
BYPASS Button
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TAPE MONITOR
Buttons
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Youmodify each channel’s sound by moving
the slide controls up or down. Each slide
control affects a small range of frequencies.
The frequency marked below a slide control
is the mid-point of the band affected by that
control.
To boost a frequency band’s level, slide the
control above 0 dB. To cut the level, slide
the control below 0 dB. If you do not want
to change the sound level of a frequency
band, leave its control set to 0 dB.
The following information groups the
frequency bands into five ranges. This
information can help you adjust the sound
for the desired effect.
Bass (20–140 Hz)
Example: Bass drum
Use these controls to enhance the music’s
low tones or to reduce rumble, acoustic
feedback, and other low-frequency noise.
Mid-Bass (140–400 Hz)
Example: Bass guitar
Boost the frequencies in this range if the
sound is too thin. Cut these frequencies if
the sound is muddy or boomy.
Mid-Range (400–2,600 Hz)
Example: Most deep vocals
Changes in this range cause the greatest
effect. The best settings for this range vary
depending on the type of music.
Upper Mid-Range (2,600–5,200 Hz)
Example: Most high vocals
Boost these frequencies to brighten the
sound. Cut these frequencies if the sound is
harsh.
High End (5,200–20,000 Hz)
Example: Piccolo
Boost these frequencies to enhance the
brilliance of the music. Cut these
frequencies if the sound is piercing. You can
also cut these frequencies to filter high-
frequency noise.
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The SPECTRUM DISPLAY shows the
relative sound level of each frequency band.
The highest and lowest sound levels might
not fully appear.
If necessary, slide DISPLAY LEVEL up to
view low sound levels or down to view the
peaks of high sound levels.
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S
lide Control
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To hear sounds without equalization (just as
you would hear them with all the equalizer
frequency controls set to 0 dB), set BYPASS
to the in position to bypass the equalizer
circuit. Set BYPASS to the out position to
return to equalization.
Caution: To prevent overdriving your
amplifier or speakers, turn down the
receiver’s volume control before you press
BYPASS. After you press BYPASS, slowly
increase the volume.
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The stereo image enhancer lets you adjust
the perceived separation between the left
and right channels so you can broaden the
sound field. You can use this feature to
compensateforimproperspeakerplacement
or simply to enhance the stereo effect.
Set IMAGE ENHANCER to the in position to
enhance the stereo effect. The image
enhancer indicator lights. Then adjust the
ENHANCER LEVEL slide control to
increase or decrease the effect. You hear the
expanded sound if you monitor either tape
deck.
Set IMAGE ENHANCER to the out position
to return to normal sound. The image
enhancer indicator turns off.
Note: The BYPASS control setting does not
affect the stereo image enhancer operation.
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If you connect a tape deck tothe equalizer as
described in “Connections” on Page 2, you
can record from any other audio source
connected to your receiver. If you connect
two tape decks, you can make two
recordings at the same time, or you can dub
(copy) a tape from one tape deck to the
other.
Note: If you record the sound with
equalization, we recommend you play it
back without equalization. If you turn on
the stereo image enhancer when you record,
werecommendyouturnoffthestereoimage
enhancer during playback. Otherwise, the
sound might distort.
The recorded sound and the sound you hear
as you record depend on the following
settings.
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To record sounds with equalization while
you listen to unmodified sounds, first adjust
the equalizer slide controls for the sound
you want. Then set EQ RECORD to the in
position and BYPASS to the out position.
You hear the equalized sound if you monitor
either tape deck. If you set BYPASS to the
IMAGE ENHANCER
Button
Image Enhancer
Indicator
ENHANCER LEVEL
Slide Control
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in position, you record sounds without
equalization.
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To record sounds with enhanced stereo
effect while you listen to unenhanced
sounds, set IMAGE ENHANCER to the in
position. Adjust the ENHANCER LEVEL
slide control to increase or decrease the
effect. Then set EQ RECORD to the in
position. You hear the expanded sound if
you monitor either tape deck.
Note: The BYPASS control setting does not
affect the stereo image enhancer operation.
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To hear a tape deck’s output, set the
appropriateTAPE MONITOR button (1or2)
to the in position. To stop monitoring, set 1
or 2to the out position.
Notes:
• Do not press in both TAPE MONITOR
buttons. If you do, you mute the sound
from both tape decks.
• Sometapedeckshaveatapemonitoring
feature. If you select your tape deck’s
monitoring feature, and you press in the
equalizer’s TAPE MONITOR button for
the tape deck you are recording to, the
sound you hear is the actual recording.
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To dub a tape from Tape Deck 1 to Tape
Deck 2, set TAPE DUBBING 1 2 to the
in position. To dub a tape from Tape Deck 2
to Tape Deck 1, set TAPE DUBBING 2 1
to the in position.
Note: Do not press in both TAPE DUBBING
buttons. If you do, neither tape deck records.
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To enjoy your RCA 10-Band Stereo Graphic
Equalizer for a long time:
• Keep the equalizer dry. If it gets wet,
wipe it dry immediately.
• Use and store the equalizer only in
normal temperature environments.
• Handle the equalizer gently and
carefully. Do not drop it.
• Keep the equalizer away from dust.
Wipe the equalizer with a damp cloth
occasionally to keep it looking new.
Modifying or tampering with the equalizer’s
internal components can cause a
malfunction and invalidate its warranty.
This equalizer has been manufactured to the
specifications of RadioShack and is covered
by a limited warranty from RadioShack. If
your equalizer is not operating as it should,
take it to your local RadioShack store or call
1-800-THE-SHACK for assistance.
EQ RECORD Button
TAPE DUBBING
Buttons
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Equalizer
Frequency Response (Flat Setting) ..................................... 20 to 30,000 Hz +0.5 dB –1.0 dB
Control Ranges ........ ± 12 dB at 31, 62, 125, 250, and 500 Hz, and at 1, 2, 4, 8, and 16 kHz
Intermodulation Distortion ........................... 0.02% at 1V Output (70 Hz/7 kHz = 4/1 Ratio)
Harmonic Distortion .............................................. 0.015% at 1V Output (20 Hz–20,000Hz)
Hum and Noise (Shorted Input) .......................................................... 95 dB (at 1V Output)
Hum and Noise (All Controls at Maximum, Input = 4.7 kohms Terminated) ................ 1 mV
Channel Separation at 1 kHz (Input 0.775V and 4.7 kohms Terminated) ..................... 62 dB
Crosstalk Between Functions at 1 kHz (Input 0.775V and 4.7 kohms Terminated) ....... 70 dB
Level Ratio Main Channel at Enhancer:
VR Maximum ............................................................... L Channel 8 dB, R Channel 8 dB
VR Minimum ......................................................... L Channel 4.5 dB, R Channel 4.5 dB
Noise Level at Enhancer, VR Maximum (Input 4.7 kohms Terminated) ..................... 0.5 mV
Total Gain (Flat Setting) .................................................................................................. 0 dB
Spectrum Display
Control Frequency Accuracy at 31 Hz–16 kHz ............................................................. ±10%
Display Frequency Response at Main 31 Hz, 1 kHz = 0 dB (18 dB LED On Position) ... ±2 dB
Meter Tolerance at 1 kHz LED On Position .................................................................. ± 2 dB
Input Sensitivity MAIN IN at 18 dB On Position ......................................................... 75 mV
General
Power Requirements .............................................................................. 120 Volts AC, 60 Hz
Dimensions (HWD:
Cabinet ..................................................................................... 23/4×161/2×81/2Inches
(69.9 ×419.1 ×215.9 mm)
Overall ...................................................................................... 31/4×161/2×91/6Inches
(82.6 ×419.1 ×232.7 mm)
Weight ................................................................................................................. 6 lb, 1.6 oz
(2.77 kg)
Specifications are typical; individual units might vary. Specifications are subject to change and
improvement without notice.
31-5001.fm Page 7 Thursday, September 23, 1999 8:19 PM

RadioShack
A Division of Tandy Corporation
Fort Worth, Texas 76102
31-5001
09A99 Printed in Korea
Limited Two-Year Warranty
This product is warranted by RadioShack against manufacturing defects in material and workman-
ship under normal use for two (2) years from the date of purchase from RadioShack company-
owned stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED
HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES,
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ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES
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VISED OF THE POSSIBILITY OF SUCH DAMAGES.
Some states do not allow the limitations on how long an implied warranty lasts or the exclusion of in-
cidental or consequential damages, so the above limitations or exclusions may not apply to you.
In the event of a product defect during the warranty period, take the product and the RadioShack
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This warranty does not cover: (a) damage or failure caused by or attributable to acts of God, abuse,
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This warranty gives you specific legal rights, and you may also have other rights which vary from
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RadioShack Customer Relations, 200 Taylor Street, 6th Floor, Fort Worth, TX 76102
We Service What We Sell 04/99
31-5001.fm Page 8 Thursday, September 23, 1999 8:19 PM