32-3008.fm Page 1 Thursday, April 6, 2000 4:03 PM
SSM-1750 4-Channel
Stereo Audio Mixer
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Care ....................................................................................................................................... 14
Replacing the Fuse ......................................................................................................... 14
Troubleshooting ................................................................................................................... 14
Specifications ...................................................................................................................... 15
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 SERVICING
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 con-
stitute a risk of electric shock. Do
not open the product’s case.
This symbol is intended to inform
you that important operating and
maintenance instructions are
included in the literature accom-
panying this product.
!
3
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ˆ Features
Your RadioShack 4-Channel Stereo Audio Mixer is a sophisticated control center, perfect for
mixing sound from multiple playback sources such as a microphone, tuner, CD player, turnta-
ble, or the audio output from a VCR.
It is ruggedly constructed for home or professional use and its wide-range volume controls let
you adjust sound levels to achieve the right mix for playing through your speaker system or for
recording. The mixer's many features give you almost limitless sound combinations.
1
2
DJ MIC
5
6
LEVEL
— lets you connect a balanced,
— lets you adjust the micro-
low impedance microphone with an XLR
plug.
phones' volumes before mixing them in.
TALKOVER
— decreases the volume of
BASS/MID/HIGH —
tone of the selected input for customized
sound.
let you adjust the
the input sources so you can talk over
them using the microphone.
7
8
MUTE LEVEL
— lets you adjust the back-
3
4
GAIN
TALK-
ground music volume when using
— individual controls let you fine
OVER
tune each input’s volume.
.
PAN
CH1 CH2 CH3 CH4 Slide Volume Con-
— lets you control the output of the
,
,
,
DJ MIC
AUX MIC/LINE
trols
— for fingertip control of sound
and
.
mixing and fading.
4
Features
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9
Assign Controls—
15 MASTER
— adjusts the overall volume of
let you select the in-
DJ MIG AUX CH1 CH2 CH3 CH4 RE-
put sources to be mixed.
,
,
,
,
,
,
CEIVE
input, and sound effects.
10 CROSS FADER
— lets you smoothly
16 MONO/STEREO Selector
switch between two input sources.
— lets you set
the output to stereo or monaural.
11 SOUND EFFECT
— let you create a spe-
17 POWER —
cial sound performance using the six
preprogrammed sound effects.
turns the mixer on and off.
18 Lamp Jack
— lets you install a 12V/3W
12 CUE LEVEL
— lets you adjust the head-
lamp to light up the mixer controls.
phone's volume.
19 ECHO Controls —
let you tailor the
13 CUE ASSIGN
— lets you select the chan-
sound to compensate for a location’s
conditions or for personal preference.
nel where the desired audio input source
is located so you can monitor and pre-
pare it before mixing it in.
20 VU (Volume Unit) —
two meters indi-
cate the total stereo output signal levels.
14 BALANCE —
lets you adjust the sound
balance between the left and right
speakers.
21 Stereo Line Outputs
— let you connect
CD player, tape deck, tuner, camcorder,
or VCR.
the mixer's output to your receiver/am-
plifier and tape deck so you can play the
sounds from your input sources through
your speaker system, and record them.
24 Auxiliary Microphone Input
— lets you
connect a low impedance microphone
1
with a /4-inch plug.
22 Sound Effect Jacks
— let you connect
25 Stereo Phono Inputs
— for connecting
another sound effect device, such as an
echo reverb, and either play the signal
from it or play another input's signal
through it. You can also vary the volume
of the signal.
low-level audio sources, such as a turn-
table with a magnetic cartridge.
26 Mono Line Input
— lets you connect a
mono input source, such as a wireless
microphone receiver.
23 Stereo Line Inputs —
let you connect
most line-level audio sources such as a
5
Features
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ˆ Preparation
PRESETTING THE
CONTROLS
CONNECTING INPUTS
You can connect up to ten audio input sourc-
es (such as cassette tape decks, CD players,
tuners, two magnetic-cartridge turntables, a
camcorder or a VCR) to the mixer’s input
jacks on the back panel. You can also con-
nect microphones to the appropriate jacks on
the top and back panels.
Warning:
A sudden high output from the
mixer could damage your hearing, especially
if you use headphones, and might also dam-
age the audio devices connected to the mix-
er's output. Before using the mixer, make
sure you set your receiver/amplifier's volume
control to its minimum volume level setting.
1. Connect the line-level outputs from up to
LINE 1 LINE2
six audio sources to the
,
,
Before you connect the power cord, make
LINE 3 LINE 4 LINE 5
LINE 6
input
,
,
, and
POWER
sure you set
to off. To avoid sudden
jacks, matching left to left, and right to
right.
and inaudible sound outputs from any audio
devices that you connect to the mixer, be
sure to have their power controls set to off,
and any tone controls set to flat.
Caution:
Do not connect an audio
source with a line-level output to the
PHONO 1 PHONO 2 AUX
, or
audio input jacks.
low-level
MIC
,
CONNECTING THE
OUTPUTS
2. Connect the low-level outputs from up to
two audio sources (such as magnetic
To play the mixer's output signal through
your sound system (for events such as par-
ties, dances, conferences, and so on), con-
nect one end of an audio patch cord (not
PHONO 1
cartridge turntables) to the
and
input jacks, matching left to
left, and right to right.
PHONO 2
OUTPUT AMP L
supplied) to the mixer's
R
Note:
(white) and
(red) jacks, then connect the
If you connect magnetic cartridge
other end to your receiver/amplifier's left and
right input jacks, matching left to left, and
right to right.
turntables, connect their ground wires
GND
(usually black or green) to
.
3. Connect a sound effect device (such as
an echo reverb or a digital sampler pro-
To record the mixer's output signal, connect
one end of an audio patch cord (not sup-
EFFECT SEND
cessor) to the
and
(output)
EFFECT RECEIVE
(input) jacks,
OUTPUT REC L
plied) to the mixer's
(white)
R
and (red) jacks, then connect the other end
to your tape deck's left and right line input
jacks, matching left to left, and right to right.
matching left to left, and right to right.
4. Connect a mono input source (such as a
wireless microphone receiver) to the
AUX LINE MONO
jacks, matching left to
left, and right to right.
6
Preparation
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Connecting Microphones
CONNECTING
HEADPHONES
You can connect two microphones (not sup-
plied) to the mixer.
To listen in privacy or monitor the audio
source inputs so you can locate an exact
passage or section before mixing it, connect
Connect a microphone with an XLR plug to
DJ MIC
on the top panel’s upper left corner.
a pair of stereo headphones (not supplied)
1
PHONES
with a /4-inch (6.35 mm) plug to the
1
Connect a microphone with a /4-inch (6.35
jack on the mixer's lower right corner.
AUX MIC
mm) plug to
lower right corner.
on the back panel’s
Your local Radio Shack store carries a wide
selection of headphones.
CONNECTING POWER
Listening Safely
Note:
Before you connect the mixer's power
cord, make sure power is turned off by press-
Do not listen at extremely high volume lev-
els. Extended, high-volume listening can
lead to permanent hearing loss.
POWER
ing
(if the control is out, the power is
off).
Connect the power cord to a standard AC
outlet.
To protect your hearing when you use head-
phones, always follow these guidelines to set
the listening volume.
Caution:
The power cord has a polarized
plug that fits only one way into a standard AC
outlet. If the plug does not fit, turn it over so it
fits properly. Do not force it!
CUE LEVEL
0
• Set
to before you begin lis-
tening.
• After you put on the headphones, adjust
CUE LEVEL
to a comfortable listening
CONNECTING A LAMP
volume level.
12V/3W MAX LAMP
The mixer has a
socket
• Once you set the headphones' volume,
do not increase it. Over time, your ears
adapt to the volume level, so a volume
level that does not cause discomfort
might still damage your hearing.
for connecting a 12V/3W BNC lamp so you
can see the control panel in dark or low light
conditions.
ˆ Operation
1. Set the volume levels on the output
devices (receiver, amplifier, or tape
deck) to minimum and turn them on.
4. Preset the input signal levels (see “Pre-
setting the Input Signal Levels” on
Page 8).
POWER
2. Press
to turn on the mixer. The
5. Mix the audio input sources (see “Mixing
the Inputs” on Page 10).
POWER indicator lights.
3. Turn on the input sources you want to
mix.
7
Operation
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Notes:
• If you did not connect an input source to
6. After you finish mixing, turn down the
volume on the output audio devices, turn
off the input and output audio devices
(amplifiers, tape decks, and so on), then
every jack or do not want to mix every
input source connected to the mixer's
input jacks, you do not need to preset
every channel input. Decide which
source(s) you want to preset and mix,
then preset those inputs only.
POWER
press
so it pops up to turn off
the mixer. The POWER indicator turns
off.
PRESETTING THE INPUT
SIGNAL LEVELS
• While you adjust the input signal levels
for channels 1, 2, 3, and 4, either use
the headphones or turn up the receiver/
amplifier's volume to a comfortable lis-
tening level (not necessarily the final
usable level).
To avoid accidentally over-driving a channel
or prematurely mixing in an audio input
source, start with the following settings:
0
• All volume slide controls set to .
• Do not play a quiet portion of music
while you adjust the volume levels, oth-
erwise the volume levels for channels 1,
2, 3, and 4 will be over-driven during the
loud portions of the music.
ASSIGN
OFF
• Both
switches set to
knobs set mid level.
.
GAIN
• All
• All
HIGH MID
BASS
CUE
controls,
,
, and
LEVEL DJ MIC LEVEL AUX LEVEL,
,
,
1. Set the channel selector to the desired
input source.
SEND RECEIVE
MASTER
0
,
, and
set to .
MASTER
Rotate
clockwise and temporarily
2. Start playback of the selected input
source.
set it to about the 5th marker.
Note:
the overall volume of
MASTER
volume control adjusts
The
HIGH MID
BASS
controls
3. Adjust the
,
, and
DJ MIC AUX CH1 CH2
,
,
,
,
as desired. See “Using the Tone Con-
trols” on Page 11.
CH3 CH4 RECEIVE
input, and sound effects.
,
,
The mixer uses two volume unit (VU) meters
to indicate the total stereo output signal level.
For the best results, each input signal level
should normally be set so the VU meters
Note:
If you are using an external equal-
0
izer, leave the tone controls set to and
adjust the tone on the external equalizer.
0
never move into the red range ( or above).
4. Slowly slide up the channel volume con-
Distortion is likely to occur on audio peaks if
the meter moves into the red range.
0
trol until you get a reading of up to on
both VU meters.
MONO/STEREO
For monaural output, set
MONO
to
Important:
Note the channel volume level
slide control's setting for the selected audio
source, so each time you want to mix that
source you can slide the volume control to
the correct setting.
STEREO
.
. For stereo output, set it to
Presetting the Channel Inputs
Follow these steps to preset each channel
input you plan to mix.
8
Operation
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Notes:
Notes:
• If it was necessary to set
DJ MIC LEVEL
• If it was necessary to set the channel
10
AUX LEVEL
10
in order
volume level slide control to
to get a
or
all the way to
0
0
reading of up to on the VU meter, then
to get a reading of up to on the VU
8
8
slide it down to about and adjust the
meter, then turn it down to about and
GAIN
0
DJ MIC GAIN
adjust the control to get a
control to get a reading of up to
0
on the VU meters. (See “Using Gain” on
Page 11.)
reading of up to on the VU meters.
(See “Using Gain” on Page 11.)
GAIN
DJ MIC GAIN
or
• If the above does not work, set
to
If that does not work, set
MASTER
AUX GAIN
MAS-
to mid level and rotate
mid level and rotate
clockwise
0
TER
until you get a reading of on the VU
clockwise until you get a reading of
0
meters.
on the VU meters.
MASTER
MASTER
, remem-
• Readjusting
affects the level of
• If you must readjust
the previously set input sources. You
must readjust those sources until you
ber, doing so affects the level of the pre-
viously set input sources. You must
readjust those sources until you get a
0
get a reading of up to
on the VU
0
meters for each input source.
reading of up to on the VU meters for
each input source.
5. Stop playback of the selected input
source.
I
3. f your XLR or auxiliary microphone has
an ON/OFF control, set it to OFF.
6. Repeat these steps for each channel
input you plan to mix.
If your XLR or auxiliary microphone
does not have an ON/OFF control, set
DJ MIC LEVEL
AUX LEVEL
0
to .
or
Presetting a Microphone
1. If your XLR or auxiliary microphone has
an ON/OFF control, set it to ON.
Presetting the Auxiliary Input
AUX LINE
1. To preset the
input source, set
If your XLR or auxiliary microphone
does not have an ON/OFF control, set
AUX
LINE
.
to
DJ MIC LEVEL
AUX LEVEL
0
or
to .
2. Start playback of the selected input
source.
DJ MIC
2. While talking continuously, adjust
LEVEL
AUX LEVEL
HIGH MID
BASS
, and controls
or
until you get a
3. Adjust the
,
0
reading of up to on both VU meters.
(See “Using an XLR Microphone” on
Page 12 and “Using an AUX Micro-
phone” on Page 12.)
as desired. See “Using the Tone Con-
trols” on Page 11.
Note:
If you are using an external equal-
0
izer, leave the tone controls set to and
Important:
DJ MIC LEVEL
AUX
or
Note the
adjust the tone on the external equalizer.
LEVEL
setting, so each time you want to mix
AUX LEVEL
4. Slowly adjust
until you get a
the microphone, you can set the control to
the correct setting.
0
reading of on both VU meters.
9
Operation
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Important:
AUX LEVEL
setting,
Note the
To avoid sudden and inaudible sound out-
puts from any audio devices that you con-
nect to the mixer, be sure to set their power
controls to off and any tone controls to flat.
so each time you want to mix that
source you can set the control to the
correct setting.
Notes:
Playing One Input Source
AUX LEVEL
• If it was necessary to set the
ASSIGN A
1. Set
to the desired source,
10
0
control to
to get a reading of up to
CROSS FADER
A
.
then set
to
AUX LEVEL
on the VU meter, then set
to
8
AUX GAIN
control
about and adjust the
CH 1 CH 2
,
2. Select the mixer's input —
,
0
to get a reading of up to on the VU
meters. (See “Using Gain” on Page 11.)
CH 3
CH 4
.
, or
3. Set the input selector control to the input
source you want to play first through
your sound system.
AUX
• If the above does not work, set
GAIN
MASTER
mid level and rotate
0
clockwise until you get a reading of on
the VU meters.
4. Adjust the receiver's or amplifier's (not
the mixer's) volume control to the
desired volume.
MASTER
• Readjust
affects the level of the
previously set input sources. You must
readjust those sources until you get a
reading of up to on the VU meters for
Make sure the first input source's vol-
ume level slide control is set to the cor-
rect preset position.
0
each.
5. Stop playback of the selected input
source.
5. Start playback of the input source.
Monitoring a Second Input Source
MIXING THE INPUTS
Monitoring a second input source's signal
level requires selecting the input source that
is not currently playing, finding the desired
section you want to mix, then adjusting the
source's sound level so it matches the vol-
ume level of the source currently playing.
You can connect input signals from up to 12
audio sources, select any two of the channel
input sources, then mix them so only one or
both play through your sound system.
Mixing requires three operations:
• Playing one input source.
1. Connect and put on headphones.
Note:
You can listen to one channel
• Monitoring the next input source.
• Switching to the next input source.
through the headphones while the other
channel is playing through the sound
system.
You can start with either of the two selected
sources.
ASSIGN
B
2. Set
to the second input
source.
To prevent prematurely mixing audio sourc-
CUE ASSIGN
3. Set
to the audio input
0
es, set all volume level controls to .
CH 1 CH 2 CH 3
CH 4
) you
source (
,
,
, or
want to monitor.
10
Operation
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4. Set the desired channel volume level
slide control to the preset position.
• To mix any two inputs selected by the
ASSIGN
ASSIGN
switches, set each
switch to the desired channel. Then use
CUE LEVEL
5. Adjust
to a comfortable lis-
CROSS FADER
to mix the two.
tening level.
CROSS FADER
• Do not slide
to the center
6. Start playback of the input source you
want to play next through your sound
system.
if you want to monitor one channel while
the other is playing. Otherwise, the
sound from the channel you monitor will
also be heard through your sound sys-
7. Set the input device to the desired sec-
tion of music, then stop or pause the
input device.
CROSS FADER
tem. Instead, slide
to the
channel you are not monitoring. For
example, to monitor channel 1 (selected
ASSIGN A
by
by
) while channel 2 (selected
Switching to the Second Input
Source
ASSIGN B
CROSS
) is playing, slide
FADER
B
.
to
CUE LEVEL
• Use
to listen to the input
1. Start playback of the second input
source.
CUE ASSIGN
controlled by the
switch
and what is playing on the currently
selected output device.
CROSS FADER
A
B
2. Slide
from
to when
you are ready to play the second
source’s sound through your sound sys-
tem.
USING THE SPECIAL
CONTROLS
CROSS FADER
Slide
:
Using the Tone Controls
• To the left to fade in the channel
ASSIGN A
selected by
and fade out
Your mixer has a set of tone controls for
each microphone and for channels 1–4. You
can tailor the high, middle, and low frequen-
cy sounds for each.
ASSIGN B
the channel selected by
.
• To the right to fade in the channel
ASSIGN B
selected by
and fade out
ASSIGN A
the channel selected by
.
BASS MID
For normal sound, leave
,
, and
HIGH
0
set to .
• To the center to equally mix the two.
HIGH MID
BASS
+10
toward
Rotate
,
or
to in-
–10
crease, or toward
respectively to de-
Notes on Mixing
crease the high, middle, and low frequency
sounds.
CROSS FADER
A
• If you set
to to play the
ASSIGN A
channel selected by
must set
, then you
CH 1
to monitor
CUE ASSIGN
to
Using Gain
CH 1
CH 2
CH 2
CH 3
to
, to
to monitor
, to
to monitor
. The same applies when you set
CH 3
CH 4
, and to
CH
monitor
4
Since the input levels of each sound source
are different, the
GAIN
controls let you fine
CROSS FADER
B
.
to
tune each selected input's volume. Rotate
GAIN
MAX
to in-
the desired
control toward
MIN
crease the volume and toward
it.
to reduce
11
Operation
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Note:
GAIN
We recommend you not adjust the
controls after you have preset the in-
Using TALKOVER
To use the microphone and reduce other au-
dio inputs so the microphone can be heard
puts as some sound imbalance could occur.
TALKOVER
ON
.
more clearly, set
to
Setting the Sound Balance
TALKOVER
ALKOVER
to
To turn off
OFF
, set T
BALANCE
lets you adjust the sound balance
DJ MIC
. All the audio inputs including
between the left and right speakers. If your
speakers are properly positioned and your
listening area is centered between the
speakers, the center setting of the control is
usually the best.
AUX MIC
and
play at the same output level,
and the background music volume is not re-
duced.
Using MUTE LEVEL
If the sound seems to be louder from one
To increase background music when using
BALANCE
speaker, adjust
until the sound
TALKOVER
MUTE LEVEL
MIN
.
, rotate
toward
seems to be coming from a point midway be-
tween the speakers.
To reduce background music, rotate it to-
MAX
ward
.
USING A MICROPHONE
Using PAN
Using an XLR Microphone
AUX LINE
To play either microphone or the
output on the left or right channel, adjust the
To mix the microphone connected to the
XLR jack with other audio input sources, ad-
PAN
L
appropriate
control. Set it to to play
R
through the left channel, to to play through
DJ MIC LEVEL
just
to increase or decrease
the right channel, or to any other position be-
the microphone volume without affecting the
volume of the other inputs.
L
R
tween and to play through both channels.
DJ MIC LEVEL
0
Set
to when you are not us-
USING SOUND EFFECTS
ing the DJ microphone. Or, if the microphone
has an ON/OFF control, set it to OFF and
There are six preprogrammed sound effects
for your mixing selection — a hi-hat close, a
rim shot, a cow bell, a cymbal, a bass drum,
and a laser drum.
DJ MIC LEVEL
leave
at its preset position.
Using an AUX Microphone
To play a sound effect, repeatedly press or
AUX
To mix a microphone connected to the
MIC
SOUND EFFECT
hold down the desired
ton.
but-
jack with other audio input sources, set
AUX MIC/LINE
MIC
AUX LEVEL
. Adjust to
to
increase or decrease the microphone vol-
ume without affecting the volume of the other
inputs.
SOUND EFFECT LEVEL
Rotate
left or right to
increase and decrease the sound effect vol-
ume.
AUX
When you are not using an
microphone,
LINE
. This lets you mix
USING ECHO EFFECTS
AUX MIC/LINE
set
to
AUX
the output from the device connected to
The mixer plays echo effects, and lets you
adjust the echo delay, the number of echo
repeats, and the echo's volume.
LINE MONO
jacks.
12
Operation
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The echo is applied to the sound before all
the inputs are mixed.
Playing Input Signals through the
Sound Effect Device
ECHO
MIC
to turn on the echo effect
Set
to
You can play inputs selected by the channel
AUX LINE
for the microphones and the
input.
DJ MIC
AUX
through other
selectors,
, or
sound effect devices connected to the mixer,
such as an echo reverb or a digital sampler
processor, and control playback through the
mixer. To play selected inputs through the
ECHO
MUSIC
to turn on the echo effect
Set
to
for Channels 1, 2, 3, and 4 outputs.
ECHO
OFF
.
To turn off the echo effect, set
to
SEND ASSIGN
sound effect device, set
selected input.
to the
Adjusting the Echo Delay, Repeat,
and Volume
SEND
The
control lets you adjust the volume
of the selected sound to the sound effect de-
vice without changing the device's volume.
ECHO DELAY
The
control lets you adjust the
ECHO DELAY
0
time delay for an echo. Set
for a minimum time delay and to
maximum time delay.
to
SEND
10
to increase the vol-
Rotate
toward
10
for a
0
ume and toward to decrease it.
ECHO REPEAT
The
control lets you control
the length of time a tone is repeated (rever-
ECHO REPEAT
10
for the
beration). Set
to
0
longest time repeat and to for the shortest.
ECHO LEVEL
The
control lets you adjust the
ECHO
output level of the echo effect. Rotate
LEVEL
10
to increase the echo level
toward
0
and toward to decrease it.
USING SOUND EFFECT
DEVICES
Playing the Signal from the Sound
Effect Device
To play signals from a device connected to
EFFECT
RECEIVE
switch to
the
jacks, set the
ON
. When you are not using the connected
RECEIVE
OFF
.
inputs, set the
switch to
RECEIVE
Rotate
to adjust the volume of the
EFFECT
input connected to the
jacks without
changing the sound effect device's volume.
RECEIVE
10
to increase the
Rotate
toward
0
volume and toward to decrease it.
13
Operation
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32-3008.fm Page 14 Thursday, April 6, 2000 4:03 PM
ˆ Care
To enjoy your mixer for a long time:
REPLACING THE FUSE
• Keep the mixer dry. If it gets wet, wipe it
dry immediately.
Your mixer requires a 250-volt, 0.5-amp fuse
to protect it from power surges and short cir-
cuits. If the mixer suddenly turns off or will
not turn on, the fuse could be blown. Replace
the fuse with a 0.5-amp, 250volt, fast-acting,
11/4 x 1/4 inch fuse (not supplied).
• Use and store the mixer only in normal
temperature environments.
• Handle the mixer gently and carefully.
Do not drop it.
Follow these steps to replace the fuse.
• Keep the mixer away from dust and dirt.
• Wipe the mixer with a damp cloth occa-
sionally to keep it looking new.
1. Using a Phillips screwdriver, unscrew
the fuse compartment cap on the back
of the mixer.
Modifying or tampering with the mixer’s inter-
nal components can cause a malfunction
and might invalidate its warranty. If your mix-
er is not performing as it should, take it to
your local RadioShack store for assistance.
2. Remove the old fuse and replace it with
an identical fuse.
Caution:
Never use a fuse of a different
type or rating.
3. Replace the fuse compartment cap.
ˆ Troubleshooting
We do not expect you to have any problems with your mixer, but if you have a problem, this in-
formation might help. If the problem persists, take the mixer to your local RadioShack store for
assistance.
Problem
Possible Solution
The mixer does not work.
Check the AC power connection and make sure the AC outlet is
“live.”
Check the power connection to the rest of the system (amplifier/
receiver, input sources, and so on).
Check the fuse. See “Replacing the Fuse” on Page 14.
TALKOVER
OFF
No signal from an audio input
sources.
Make sure the
switch is set to
.
Check the mixer’s and the source’s control settings.
Check the connection between the mixer and the input source.
Make sure the turntable’s ground wire (usually black or green) is
You are getting a hum from the
PHONO sources.
GND
connected to the
screw on the back of the mixer.
14
Care
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32-3008.fm Page 15 Thursday, April 6, 2000 4:03 PM
Problem
Possible Solution
LINE
You are getting a hum from other Make sure there are no low-level inputs connected to the
input source jacks.
input
You are getting feedback noise. Move the microphone further away from the output speakers or use
a unidirectional microphone.
ˆ Specifications
Input Sensitivity/Impedance
DJ MIC (XLR jack) ............................................................. 1.5 mV, 600 ohms, Balanced/Unbalanced
AUX MIC (Phone jack) ....................................................................... 1.5 mV, 600 ohms, Unbalanced
Phono ......................................................................................................................... 3 mV/50 kOhms
Line ........................................................................................................................ 150 mV/27 kOhms
Output Level
Main Out ......................................................................................................................... 2V/10 kOhms
Record .................................................................................................................... 150 mV/10 kOhms
Send ....................................................................................................................... 150 mV/10 kOhms
Frequency Response ................................................................................................ 20–20k Hz ±3 dB
S/N Ratio
Mic ............................................................................................................................................... 55 dB
Phono .......................................................................................................................................... 65 dB
Line ............................................................................................................................................. 75 dB
Distortion
Mic .............................................................................................................................................. 0.20%
Phono ......................................................................................................................................... 0.08%
Line ............................................................................................................................................ 0.05%
Tone Control, DJ MIC, AUX, CH 1, CH 2, CH 3, CH4
HIGH Boost/Cut Range .............................................................................................. ±10dB at Center
MID Boost/Cut Range ................................................................................................ ±10dB at Center
BASS Boost/Cut Range ............................................................................................. ±10dB at Center
ECHO Delay Time .............................................................................................................. 50 –120ms
TALKOVER Attenuation ................................................................................................... –8 to –38 dB
Power Source ......................................................................................................... AC 120V, 60Hz, 20 Watt
Power Fuse ..................................................................................................................... 0.5 Amp/250 Volts
Dimensions (HWD).................................................................................................... 4 7/16 × 19 × 11 Inches
(113 × 482 × 280 mm)
Weight ......................................................................................................................................... 11 Ibs 6 oz
(5.15 kg)
Specifications are typical; individual units might vary. Specifications are subject to change and improve-
ment without notice.
15
Specifications
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32-3008.fm Page 16 Thursday, April 6, 2000 4:03 PM
Limited One-Year Warranty
This product is warranted by RadioShack against manufacturing defects in material and workman-
ship under normal use for one (1) year from the date of purchase from RadioShack company-owned
stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED HEREIN, Ra-
dioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES, INCLUDING
THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED
IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES CONTAINED
HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL HAVE NO LIABILITY OR RE-
SPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY
LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE OR PERFOR-
MANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY, IN-
CLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE, LOSS
OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT, SPECIAL, INCIDEN-
TAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limita-
tion of incidental 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
sales receipt as proof of purchase date to any RadioShack store. RadioShack will, at its option, un-
less otherwise provided by law: (a) correct the defect by product repair without charge for parts and
labor; (b) replace the product with one of the same or similar design; or (c) refund the purchase
price. All replaced parts and products, and products on which a refund is made, become the prop-
erty of RadioShack. New or reconditioned parts and products may be used in the performance of
warranty service. Repaired or replaced parts and products are warranted for the remainder of the
original warranty period. You will be charged for repair or replacement of the product made after the
expiration of the warranty period.
This warranty does not cover: (a) damage or failure caused by or attributable to acts of God, abuse,
accident, misuse, improper or abnormal usage, failure to follow instructions, improper installation or
maintenance, alteration, lightning or other incidence of excess voltage or current; (b) any repairs
other than those provided by a RadioShack Authorized Service Facility; (c) consumables such as
fuses or batteries; (d) cosmetic damage; (e) transportation, shipping or insurance costs; or (f) costs
of product removal, installation, set-up service adjustment or reinstallation.
This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state.
RadioShack Customer Relations, 200 Taylor Street, 6th Floor, Fort Worth, TX 76102
We Service What We Sell
12/99
RadioShack
A Division of Tandy Corporation
Fort Worth, Texas 76102
32-3008
04A00
Printed in China
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