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3-Channel Stereo Audio Mixer
Cat. No. 32-3009
OWNER’S MANUAL
Please read before using this equipment.
SSM-1250
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Warnin
: To prevent fire or shock
hazard, do not expose this mixer to
rain or moisture.
CAUTION
RISK OF ELECTRIC SHOCK.
DO NOT OPEN.
CAUTION
ELECTRIC SHOCK, DO NOT REMOVE
COVER OR BACK. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING
TO QUALIFIED PERSONNEL.
: TO REDUCE THE RISK OF
!
This symbol is intended to alert you to the presence of uninsul ated dangerous voltage within the mixer’s enclosure that might be of sufficient
magnitude to constitute a risk of electric shock. Do not open the mixer’s
case.
This symbol is intended to inform you that important operating and main-
!
tenance instructions are included in the literature.
© 1997 Tandy Corporation.
RadioShack and Optimus are registered trademarks used by Tandy Corporation.
All Rights Reserv ed .
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CONTENTS
Features ................................................................................................................ 4
Preparation ........................................................................................................... 6
Connecting the Outputs .................................................................................. 6
Connecting the Inputs ..................................................................................... 6
Connecting Power ........................................................................................... 8
Connecting a Lamp ......................................................................................... 8
Connecting Headphones . ............................................................................... 9
Listening Safely ........................................................................................ 9
Operation ............................................................................................................ 10
Presetting the Input Signal Levels ................................................................ 10
Presetting the Microphone ...................................................................... 11
Presetting the Channel 1/2/3 Input Sources ................................... ....... . 11
Checking the Sound ............................................................................... 14
Mixing the Inputs .. ......................................................................................... 15
Playing One Input Source ....................................................................... 15
Monitoring a Second Input Source ......................................................... 15
Switching to the Second Input Source .................................................... 16
Notes on Mixing ...................................................................................... 16
Using Talkover .............................................................................................. 17
Using the Tone Controls ................................................................................ 18
Troubleshootin
Care and Maintenance ...................................................................................... 20
Replacing the Fuse ....................................................................................... 21
Specifications .................................................................................................... 22
................................................................................................ 19
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FEATURES
Your Optimus SSM-1250 3-Ch annel Stereo Audio Mixer is a sophisticated con trol
center, perfect for mixing sound from multiple audio sources on three separate
channels such as microphon es, tuners, CD players, turntables, or the audio outputs from VCRs. The mixer is ruggedly constructed for home or prof essional use.
Its wide-range volume controls let you adjust each audio source’s sound level so
you can get the best mix for playing through your sound system or for recording.
1
DJ Microp ho ne Inp ut
connect a balanced, low impedance microphone with an XLR
plug.
2 Microphone Treble
adjust the microphone’s treble.
3 Microphone Bass
just the microphone’s bass.
4 Assi
5 Talkover
4
n Contro ls
lect the input sources to be mixed.
— lowers the sound of
the input sources so you can talk
over them using the microphone.
— lets you
— lets you
— lets you ad-
— lets you se-
6 Slide Volume Controls
gertip control of sound mixing and
fading.
7 Cross Fader
switch between two input sources.
8 Input Source Selectors
you easily choose the desired audio input source to be played.
9 Master Volume
trol the mixer’s overall volume level.
10 Output Level VU Meters —
cate the mixer’s total output signal
level.
— lets you smoothly
— lets you con-
— for fin-
— let
indi-
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11 Mono/Stereo Selector — lets
you set the output to stereo or
monaural.
12 Bass/Middle/Treble Controls —
let you adjust the tone of the selected output to get just the right
sound.
13 Cue Assign Controls — lets you
select the channel where t he desired audio input source is located
so you can monitor a nd prepare it
before mixing it in.
14 Cue/Program Control — lets you
balance the volume of the output
playing on the sound system and
the input being prep ared for mixing through the headphones.
15 Lamp Jack — lets you connect a
12V DC lamp to light the mixer
controls.
16 Phones Jack — lets you connect
a pair of stereo headphones with
1
a
/4-inch plug.
17 Cue Level — lets you adjust the
headphone’s volume level.
18 Stereo Line Outputs — let you
connect the mixer’s output to your
receiver/amplifier and tape deck
so you can play the sounds from
your input sources through your
speaker system, and record them.
illustrat io n of m ix e r back
19 Stereo Line Inputs — let you
connect most line-level audio
sources such as a CD player, tape
deck, tuner, camcorder , or VCR.
20 Stereo Phono Inputs — for con-
necting low-level audio sources,
such as turntables w ith a magnetic cartridge.
21 Microphone Input — lets you
connect a low impedance microphone with a
1
/4-inch plug instead
of one with an XLR plug.
5
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PREPARATION
Warning:
the mixer could damage your hea ring,
especially if you use headphones, and
might also damage the au dio devices
connected to the mixer’s output. Before using the mixer, make sure you
set your receiver/amplifier’s volume
control to its minimum volume level
setting.
Before you connect the AC power
cord, make sure you set
And, to avoid sudden and unusable
sound outputs from any audio devic es
that you connect to the mixer, be sure
to have their power controls set to off
(and any tone controls set to flat).
A sudden high output from
POWER
to off.
CONNECTING THE
OUTPUTS
To play the mixer’s output signal
through your sound system (for events
such as parties, dances, conferences,
and so on), connect one end of an audio patch cord (Cat. No. 42-2356, not
supplied) to the mixer’s
R
and
(red) output jacks, then connect
the other end to your receiver/amplifier’s left and right line input jacks
(matching left to left, and right to right).
AMP L
(wh ite )
illustra tio n of output AM P
to sound system
To record the mixer’s output signal,
connect one end of an audio patch
cord (Cat. No. 42-2356, not supplied)
to the mixer’s
(red) output jacks, then connect the
other end to your tape deck’s l eft and
right line input jacks (matching left to
left, and right to right).
illustra tion of output REC
to recorder
AMP connections should
still appear
REC L
(white) and
CONNECTING THE
INPUTS
R
You can connect up to four line-leve l
and up to two low-level audio input
sources to the input jacks on the back
of the mixer. You can also connect a
microphone to the mixer’s front or
back panel.
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1. Connect the line-level outputs from up to fou r audio sources (such as a CD
player, tape deck, tuner, camcorder, or VCR) to the
LINE 4
input jacks (m atching left to left, right to right).
LINE 1, LINE 2, LINE 3
illustr a t io n of line-level
connections
AMP and REC connections
should also appear
, and
Caution:
level
Do not connect an audio source with a line-level output to the low-
PHONO 1
PHONO 2
or
input jacks.
2. Connect the low-level outputs from up to two audio sources (such as magneticcartridge turntables) to the
PHONO 1
and
PHONO 2
input jacks (matching left to
left, right to right).
illustratio n of low-level
connections
AMP, REC, and line-level
connections should also
appear
If you connect magnetic-cartridge tu rntables, also connect their ground
Note:
wires (usually black or green) to
GND
.
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3. Connect a microphone (not supplied) to the mixer.
• If the microphone has an XLR
MIC
plug, connect it to
on the
top left corner of the front panel.
illustration of microphone
plug being inserted into jack
Do not show entire
microphone
1
• If the microphone has a
plug, connect it to
MIC
/4-inch
on the low-
er right corner of the back panel.
illustration of microphone
plug being inserted into jack
Do not show entire
microphone
CONNECTING POWE R
Connect the power cord to a s tandard
AC outlet.
The power cord has a pola rized
Note:
plug that fits only one way into a standard AC outlet. If the plug does not fit,
turn it clockwise so it fits properly. Do
not force the plug into the A C out let or
you could damage the outlet or the
plug.
CONNECTING A LAMP
The mixer has a 12V BNC lamp socket for connecting a 12V DC/3W lamp
(RSU Cat. No. 11443363) s o you can
see the control panel in dark or lowlight conditions.
illustration of lamp
being connected
We recommend yo u do not
Note:
connect an XLR and a
plug microphone to the mixer at
the same time.
8
1
/4-inch
Caution:
lamp.
Use only a 12V DC/3W
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CONNECTING
HEADPHONES
To listen in privacy or monitor the audio source inputs so you can locate an
exact passage or section before mixing it, plug a pair of stereo headphones (not supplied) with a
plug into the
er’s right front panel.
PHONES
jack on the mix-
ill ustration of he adphon es
being connected
Your local RadioShack sto re carries a
wide selection of headphones.
1
/4-inch
Listening Safely
Do not listen at extremely high volume
levels. Extended high-volume listening
can lead to permanent hearing loss.
To protect your hearing when you use
headphones, always follow these
guidelines to set the listening volume.
CUE LEVEL
•Set
ting before you begin listening.
• After you put on the headphones,
adjust
able listening volume level.
• Once you set your headphones’
volume, do not increase it. Over
time, your ears adapt to the volume level, so a level that no
longer causes discomfort might
still damage your hearing.
CUE LEVEL
to the lowest set-
to a comfort-
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OPERATION
1. Set the volume levels on the out put devices (receiver/amplifier and
tape deck) to minimum and turn
them on.
2. Press
POWER
er. The red power indicator lights.
to turn on the mix-
illustration of POWER
button w/indi c at or lit
3. Turn on the input sources you
want to mix.
4. Using the mixer requires two basic
operations:
• Presetting the input signal lev-
els (see “Presettiing the Input
Signal Levels”)
• Mixing the audio inp ut sources
(see “Mixing the Inputs” on
Page 15)
PRESETTING THE INPUT
SIGNAL LEVELS
To avoid accidentally overdriving a
channel or prematurely mixing in an
audio input source, make sure you
start with the following settings:
• Volume slide controls set to
illustration
ASSIGN A
•
OFF
and
ASSIGN B
illustration
0
set to
5. 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 press
POWER
the mixer. The power indicator
turn s o ff.
10
so it pops up to turn off
MIC TREBLE, MIC BASS, CUE LEV-
•
TREBLE, MID, BASS
EL
,
MASTER
set to
0
, and
illustratio n
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Rotate
MASTER
clockwise and temp o-
rarily set it to about the 5th marker.
illustratio n
MASTER
Note:
The
adjusts the overall volu me of
CH1, CH2
, and
volume control
CH3
.
DJ MIC
The mixer uses two v olume unit (VU)
meters to indicate the total stereo out put signal level. For the best results,
each input signal l evel should n ormally be set so the VU meters never
move into the red range (
0
or above).
Distortion is likely to occur on audio
peaks if the meter moves into the red
range.
Presetting the Microphone
1. If your microphone has an ON/
OFF control, set it to ON.
2. Set
,
3. While continuously talking, adjust
OFF/ON/TALKOVER
illustration
DJ MIC
up to
until you get a reading of
0
on both VU meters.
illustration DJ MIC
to ON.
illustration of VU meters
at 0
For monaural output, set
to
MONO
. For stereo output, set
STEREO
to
REO
MONO/STEREO
illustration of mixer front
w/arrow to control
MONO/STE-
.
4. Set
OFF/ON/TALKOVER
to
OFF.
Presetting the Channel 1/2/3
Input Sources
Before you mix channels 1, 2, and 3,
you must preset the input signal level
for each channel input source (up to
six sources).
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If you did not connect an input source
to every jack or do not want to mix every input source connected to the mixer’s input jacks, you do not need to
follow all the steps in this section. After you decide which source(s) you
want to preset and mix, us e this table
to determine which steps to follow.
To Preset See Steps
Channel 1 Phono 1 1–4
Line 1 5
Channel 2 Phono 2 6–9
Line 2 10
Channel 3 Line 3 11–14
Line 4 15
Notes:
• While you adjust the input signal
levels for channels 1, 2, and 3, either use the headphones or turn
up the receiver/amplifier’s volume
to a comfortable listening level
(not necessarily the final usable
level).
• Do not play a qu iet po rtion of music while you adjust the volume
levels, otherwise the volume levels for channels 1, 2, and 3 will be
overdriven during the loud portions of the music.
1. To preset the
source, set
PHONO 1
.
PHONO 1
PHONO 1/LINE 1
input
to
illustration of
PHONO 1/LINE 1 set
to PHONO 1
2. Start playback of the selected input so urce .
3. Slowly slide up the
CH 1
volume
level slide control until you get a
reading of up to
0
on both VU
meters.
illustration of CH 1 control
Important: Write down or remem-
CH 1
ber the
volume level slide
control’s setting for the selected
audio source, so each time you
want to mix that source you can
slide the
CH 1
volume level slide
control to the correct setting.
Note: If it was necessary to set
CH 1
the
all th e way to
reading of up to
meter, then slide
about
volume level slide control
10
in order to get a
0
on the VU
CH 1
down to
8
and rotate
MASTER
clockwise until you get the reading of
on the VU meters.
0
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4. Stop playback of the selected input source.
LINE 1
5. To pre set the
PHONO 1/LINE 1
set
input source,
LINE 1.
to
Then repeat Steps 2–4.
If you have to readjust
Note:
TER
when performing Step 3, re-
MAS-
member that this affects the level
of the previously preset input
sources. You m ust readjust those
sources until you g et a reading of
0
up to
on the VU meters for each.
6. To preset the
source, set
PHONO 2
PHONO 2/LINE 2
.
PHONO 2
input
to
illustratio n of
PHONO 2/LINE 2 set
to PHONO 2
7. Start playback of the selected input source.
CH 2
8. Slowly slide up the
volume
level slide control until you get a
reading of up to
0
on both VU
meters.
Important:
ber the
Write down or remem-
CH 2
volume level slide
control’s setting for the selected
audio source, so each time you
want to mix that source you can
slide the
CH 2
volume level slide
control to the correct setting.
Note:
the
all th e way to
reading of up to
meter, then slide
about
If it was necessary to set
CH 2
volume level slide control
10
in order to get a
0
on the VU
CH 2
down to
8
and rotate
MASTER
clockwise until you get the reading of
on the VU meters.
9. Stop playback of the selected input so urce .
LINE 2
10. To preset the
PHONO 2/LINE 2
set
input source,
LINE 2.
to
Then repeat Steps 7–9.
If you have to readjust
Note:
TER
when performing Step 8, re-
MAS-
member that this affects the level
of the previously preset input
sources. You must readjust those
sources until you get a reading of
0
up to
11. To preset the
set
on the VU meters for each.
LINE 3
input source,
LINE 3/LINE 4
to
LINE 3
.
0
illustration of CH 2 control
illustra tio n of
LINE 3/LINE 4 set to
LINE 3
12. Start playback of the selected input so urce .
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13. Slowly slide up the
CH 3
volume
level slide control until you get a
reading of up to
0
on both VU
meters.
illustration of CH 3 control
Im
ortant:
ber the
Write down or remem-
CH 3
volume level slide
control’s setting for the selected
audio source, so each time you
want to mix that source you can
slide the
CH 3
volume level slide
control to the correct setting.
Note:
the
all the way to
reading of up to
meter, then slide
about
If it was necessary to set
CH 3
volume level slide control
10
in order to get a
0
on the VU
CH 3
down to
8
and rotate
MASTER
clockwise until you get the reading of
on the VU meters.
14. Stop playback of the selected input source.
LINE 4
15. To preset the
LINE 3/LINE 4
set
input source,
LINE 4.
to
Then
repeat Steps 12–14.
If you have to readjust
Note:
TER
when performing S tep 13, re-
MAS-
member that this affects the level
of the previously preset input
sources. You m ust readjust those
sources until you g et a reading of
0
up to
on the VU meters for each.
16. To prevent prematurely mixin g audio sources, set all volume level
slide controls to
0
.
Checking the Sound
1. Select one of the input sources,
then start playback of the selected
source.
2. Set the volume level slide cont rol
to the position you determined
during presetting. The VU meters
should show a reading of up t o
dB.
3. Turn up the receiver/amplifier’s
volume until it reaches the desired
level for the location or event
where the mixer will be used (this
can vary).
4. Adjust
BASS, MID
, and
TREBLE
get the desired sound (see “Using
the Tone Controls” on Page 18).
If adjusting
Note:
0
TREBLE
exceed
causes the VU meters to
0
dB, rotate
BASS, MID
MASTER
counterclockwise until the reading returns to
0
. Then adjust your
output device (amplifier) volume
accordingly.
5. Stop playback of the selected input so urce .
Do not adjust
Note:
MASTER
checking the sound.
0
to
, and
after
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MIXING THE INPUTS
You can connect input signals from up
to six audio sources, select any two,
then mix them so only one or both
play through your sound system.
Mixing requires three operations:
• Playing one input source
• Monitoring the next input source
• Switching to the next input source
You can play either of the two selected so u r ces fi r st.
Notes:
Playing One Input Source
• Ensure the volume level slide control for the other input channel
source is set to 0.
• The CUE ASSIGN switches are
push-on and push-off. Y ou can select more than one at a time.
1. Set
ASSIGN A
source, then
A
.
to the desired
CROSS FADER
set
illustration of ASSIGN A
set to 1 and CROSS
FADER set to A
to
2. Set the input source selector to
the preset input source you want
to play first through your sound
system.
illustration
3. Make sure the first input source’s
volume lev el slide con trol is set to
the correct preset position.
4. Start playback of the input source.
Monitoring a Second
Input Source
Monitoring a second input source’s
signal level requires selecting the input source that is
ing, finding the desired section you
want to mix, then adjusting that
source’s sound level so it matches t he
volume level of the source currently
playing.
1. Connect and put on headphones.
Note:
You c an listen to one channel through the headphones whil e
the other channel is playing
through the sound system.
2. Set
ASSIGN B
source.
not
currently play-
to the second input
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3. Press
CUE ASSIGN
for the second
input source.
illustratio n of CUE
ASSI GN with arro w to
CH 2
4. Set the input source selector to
the input source you want to mo nitor.
illustration
5. Start playback of the input source
you want to play next through your
sound system.
6. If necessary:
• Adjust
CUE LEVEL
to a comfort-
able listening level.
• Adjust the second input source
volume slide control to the correct preset position.
7. Set the input device to the desired
section of music, then stop or
pause the input device.
Switching to the Second
Input Source
1. Start playback of the second input
source.
tem, slide
CROSS FADER
from
to B.
illustra tio n of C RO S S
FADER w/arrow
from A to B
CROSS FADER
Slide
• To the
selected by
left
to fade in the channel
:
ASSIGN A
and fade
out the channel selected by
SIGN B
• To the
nel selected by
.
right
to fade in the chan-
ASSIGN B
fade out the channel selected
ASSIGN A
by
• To the
.
center
to equally mix the
two.
Notes on Mixing
• If you set
play
SIGN A
ASSIGN
CH 2 to
monitor
CH 4
MIC
. The same applies when you
CROSS FADER
set
• To mix any two inputs selected by
the ASSIGN switches, set each
ASSIGN switch to the desired
channel. Then use
to mix the two.
CROSS FADER
to A to
the channel selected by
, then you must set
CH 1 to
to
monitor
CH 3
, and to
monitor
CH 2
CH 4
, to
MIC
to monitor
to
CROSS FADER
CH 1
CH 3
, to
to monitor
B.
A
AS-
and
AS-
CUE
, to
to
DJ
2. When you are ready to play its
sound through your sound sys-
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• Do not slide
center if you want to
CROSS FADER
monitor
to the
channel while the other is playing.
Otherwise, the sound from the
channel you monitor will also be
heard through your sound system.
Instead, slide
CROSS FADER
the channel you are not monitoring. For example, to monitor channel 1 (selected by
ASSIGN A
while channel 2 (selected by
SIGN B
FADER
•Use
) is playing, slide
to B.
CUE/PGM
to listen to the input
controlled by the
CROSS
CUE ASSIGN
switch and what is playing on the
currently selected output device.
When
CUE/PGM
is set to
CUE
only hear the channel selected by
CUE ASSIGN
the
CUE/PGM
is set to
switches. When
PGM
, you only
hear what is playing on the currently selected ou tput device. R o-
CUE/PGM
tate
to listen to both
inputs at the same time.
one
to
AS-
, you
USING TALKOVER
illustration of switch
set to TALKOVER
)
When you are not using the microphone, leave
OFF.
to
The microphone’s input is
turned off and all other audio input
sources are unaffected.
If you want to use a microphone:
•Set
mix the microphone equally with
the other audio input sources.
•Set
OVER
higher level than the other audio
input sources.
OFF/ON/TALKOVER
OFF/ON/TALKOVER
OFF/ON/TALKOVER
to ON to
TALK-
to
to mix the m icrophone at a
set
Your vo ice sounds clearly through
the microphone, but all the other
audio input sources sound at a
lower level. (This is useful for paging.)
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USING THE TONE
CONTROLS
Your mixer has one set of tone controls for the microphone and another
set for channels 1, 2, and 3. You can
tailor the high and low frequency
sounds for the m icrophone and t ailor
the high, low, and mid frequency
sounds for channels 1, 2, and 3.
illustrat io n of m ixer front
w/arrows to the control
locations
For normal sound, leave
TREBLE
and
TREBLE
Rotate
+10
ward
for the microphone) set to 0.
TREBLE
to increase, or toward –
(or
MIC BASS
(or
BASS, MID
and
MIC TREBLE
MIC
) to-
10
decrease the high frequency sounds.
Rotate
toward –
MID
toward
10
to decrease the middle fre-
+10
to increase or
quency sounds.
Rotate
+10
BASS
to increase or toward –10 to de-
(or
MIC BASS
) toward
crease the low frequency sounds.
18
,
to
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TROUBLES HOOTING
With proper care and handling, your mixer should give you years of trouble-fr ee
service. However, if your SSM-1250 is not working properly, follow these suggestions to see if you can eli minate the probl em. If yo u cannot, take the mixer to y our
local RadioShack store for assistance.
Problem Possible Solution
Nothing works Check the AC power connection and make sure the AC
outlet is “liv e. ”
Check all the connections to the system (amplifier/
receiver, input sources, and so on).
Check the fuse. See “Replacing the Fuse” on Page 21.
No signal from an audio
input source
Make sur e th e
TALKOVER
Check the mixer’s and the source’s control settings.
Check the connection between the mixer and the input
source.
Hum from
sources
PHONO
Make sure the turntable’s ground wire (usually black or
green) is connected to the
the mixer.
Hum from other input
sources
Make sure there are no low-level inputs connected to
LINE
the
Feedback “squeals” Move the microphone further away from the output
speakers or use a unidirectional microphone.
OFF/ON/TALKOVER
.
input jacks.
switch is not set to
GND
screw on the back of
19
Page 20
32-300 9.fm Page 20 Tuesday, August 10, 1999 8:31 AM
CARE AND MAINTENANCE
Your Optimus SSM-1250 3-Channel S tereo Audio Mixer is an e xample of superior
design and craftsmanship. The following suggestions will help you care for your
mixer so you can enjoy it for years.
Keep the mixer dry. If it gets wet, wipe it dry immediately. Liquids
might contain minerals that can corrode the electronic circuits.
Use and store the mixer only in no rmal temperature environments.
Temperature extremes can shorten the life of electronic devices and
distort or melt plastic parts.
Keep the mixer away from dust and dirt, which can cause premature
wear of parts.
Handle the mixer gently and carefully. Dropping it can damage circuit
boards and cases and can cause the mixer to work improperly.
Wipe the mixer with a damp cloth occasionally to keep it looking new.
Do not use harsh chemicals, cleaning solvents, or strong detergent s
to clean the mixer.
Modifying or tampering with the mixer’s internal components can cause a malfunction and might invalidate your mixer’s warranty. If your mixer is not performing
as it should, take it to your local RadioShack store for assistance.
20
Page 21
32-300 9.fm Page 21 Tuesday, August 10, 1999 8:31 AM
REPLACING THE FUSE
The mixer uses a fuse for protection
from power surges and short circui ts.
If the mixer suddenly turns off and will
not turn on, check the fu se. If necessary, replace the fuse with a 0.5-amp,
250-volt, fast-acting, 1
such as Cat. No. 270-1003 (no t supplied).
Follow these steps to replace the fuse.
1. Disconnect power from the mixer.
2. Using a Phillips screwdriver, unscrew the fuse compartment cap
on the back of the mixer.
1
×
/
4
1
/4 inch fuse
illustration
3. Remove the old fuse and insert
the new one.
Caution:
Make sure you replace
the fuse only with another fuse of
the same type and rating.
4. Replace the fuse compartment
cap.
5. Reconnect power.
21
Page 22
32-300 9.fm Page 22 Tuesday, August 10, 1999 8:31 AM
SPECIFICATIONS
Input Sensitivity/Input Impedance
DJ Mic (XLR jack) ....................... 1.5 mV/600 Ohms, Balanced/Unbalanced
Mic 2 (Phone jack) ...................... 1.5 mV/600 Ohms, Balanced/Unbalanced
PHONO 1, PHONO 2
LINE 1, LINE 2, LINE 3, LINE 4
Output Level
Main Out .................................................................................. 2 V/10 kOhms
Record .............................................................................. 100 mV/10 kOhms
Frequency Response .................................................... 20 Hz–20 kHz +3 dB
S/N Ratio (for 1 kHz Input)
Mic ........................................................................................................ 60 dB
Phono ................................................................................................... 70 dB
Line ...................................................................................................... 80 dB
Distortion
Mic ......................................................................................................... 0.2%
Phono .................................................................................................. 0.05%
Line ..................................................................................................... 0.03%
.............................................................. 3 mV/50 kOhms
........................................... 150 m V/10 k Ohms
MIC
Tone Control (
)
Treble ................................................................................................. ±10 dB
Bass ................................................................................................... ±10 dB
Tone Control (
MASTER
)
Treble ................................................................................................. ±10 dB
Middle ................................................................................................. ±10 dB
Bass ................................................................................................... ±10 dB
Talkover Attenuat ion .. .................................................................................. –16 dB
Power Source .......................................................... AC 120V AC, 60 Hz, 20 Watts
3
Dimensions (HWD) ............................................................... 4
/4 × 19 × 71/2 Inches
(120 × 482 × 192 mm)
Weight ...................................................................................................... 8 lbs 9 oz
(3.9 kg)
Specifications are typical; individual units m ight vary. Specifications are subj ect to
change and improvement without notice.
22
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32-300 9.fm Page 23 Tuesday, August 10, 1999 8:31 AM
NOTES
23
Page 24
32-300 9.fm Page 24 Tuesday, August 10, 1999 8:31 AM
Limited One-Year Warranty
This product is warrant ed by RadioShac k against man ufacturing d efects in materia l and workmanship 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, RadioShack 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 PROVI DED HEREIN, Rad ioShack SH ALL HAVE NO LIABILIT Y OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY
LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY O R INDIRECTLY BY USE OR PERFORMANCE OF THE PRODUCT OR ARI SING OUT OF ANY BREACH OF THIS WARRANTY, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE, LOSS
OF TIME, DATA, PROPERTY, REVENUE, OR P ROFIT OR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
Some states do not allow the limitations on how long an implied warranty lasts or the exclusion 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 warran ty period, take the product and the RadioShack
sales receipt as proof of pur cha se date to any RadioS hack s tore. Radi oSha ck wil l, at its option, unless otherwise provided by law: (a) correct the defect by product repair without charge for parts and
labor; (b) replace the produc t with one of the same or similar design; or (c) refund the purchase
price. All replaced parts and pr oducts, and pro ducts on which a refund is made, become the property of RadioShack. New or rec onditioned parts and products may be used in the performance of
warranty service. Repa ired or replaced parts and produ cts 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, impr oper or abnormal usa ge, failure to fol low i nstruct ions, improper instal lation or
maintenance, alterati on, lightning or other incidence of exc ess voltage or current; (b) any repairs
other than those provi ded by a RadioShack Autho rized Service Facility; ( c) consumables such as
fuses or batteries; (d ) cosmeti c dam age; (e) transp ortatio n, sh ipping or insuranc e c osts; or (f) cos ts
of product removal, installation, set-up service adjustment or reinstallation.
This warranty gives you specifi c legal rights, and you may also have oth er rights which vary from
state to state.
RadioShack Customer Relations, Dept. W, 100 Throckmorton St., Suite 600, Fort Worth, TX 76102
We Service What We Sell
3/97
RadioShack
A Division of Tandy Corpor ation
Fort Worth, Texa s 76102
6A7 Printed in China
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