Optimus SSM-1250, 32-3009 User Manual
32-300 9.fm Page 1 Tuesday, August 10, 1999 8:31 AM
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.
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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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