32-3001.fm Page 1 Tuesday, August 10, 1999 8:02 AM
Cat. No. 32-3001
OWNER’S MANUAL
Please read before using this equipment.
SM-1000
Audio Mixer with Echo (Rack Mount Type)
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CONTENTS
Preparation............................................................................................................. 4
Connecting the Outputs .................................................................................... 4
Connecting Inputs and Presetting Levels ......................................................... 4
Pre-Adjusting the Monitor Levels ...................................................................... 5
Listening Safely .......................................................................................... 6
Operation................................................................................................................ 7
Basic Operation ................................................................................................ 7
Using The “DJ’s” Microphone............................................................................ 8
Normal........................................................................................................ 8
Talkover ...................................................................................................... 8
Standby ...................................................................................................... 8
Using Echo........................................................................................................ 8
Using the 7-Band Frequency Equalizer ............................................................ 9
Troubleshooting .................................................................................................. 10
Care and Maintenance ........................................................................................ 11
Specifications ...................................................................................................... 12
Warning: To prevent fire or shock hazard, do not expose this mixer to rain or mois-
ture.
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 uninsulated dan-
gerous 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 accompanying this mix-
er.
!
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PREPARATION
1. Connect the AC power cord to a
standard AC outlet.
CONNECTING THE
OUTPUTS
2. Before turning on the power:
Connect your amplifier and a cassette
recorder to the audio output jacks on
the back of the mixer.
• Set MIC, PHONO 1, PHONO 2,
LINE 1, and LINE 2 to 0.
• Set NORMAL/STANDBY/TALK-
OVER to STANDBY.
(illus - show the
left and right out-
put jacks.)
• Set MONITOR LEVEL fully coun-
terclockwise to minimum.
• Set EQUALIZER BYPASS/ON to
BYPASS.
1. Connect the amplifier’s left and
right input jacks to the mixer’s
MAIN OUT output jacks to play the
mixer’s sound.
(illus)
2. Connect the tape recorder’s left
and right input jacks to the mixer’s
TAPE OUT output jacks to record
the mixer’s sound.
3. Set POWER OFF/ON to ON to turn
on the mixer’s power. The VU
meters and the power indicator
lights.
4. Connect
a
high-quality micro-
CONNECTING INPUTS
AND PRESETTING
LEVELS
1
phone with a /4-inch plug to the
MIC terminal.
Note: This is the remote (guest)
microphone.
Connect your audio sources (AM/FM
tuners, CD players, cassette decks, or
phonograph players) to the audio in-
put jacks on the back of the mixer.
5. Set MIC main volume control to 5.
(illus - show the
left and right input
jacks.)
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PHONO
ceramic
Note: You can set the control to
• Except for the
0
any other position (except ).
inputs, you can connect any high-
level audio source (tuner, cassette
tape deck, CD player, magnetic-
cartridge turntable, or VCR) to any
set of input jacks.
However, to get an accurate pre-
set, all the volume controls must
set to the exact same position.
• Connect the ground wires (usually
black or green) from your mag-
netic cartridge turntable to the
(illus)
GND
screw terminal on the back of
the mixer.
5. While you use the microphone,
insert a flat bladed screwdriver
into the slot above the corre-
sponding volume control and
adjust it until you obtain a reading
PRE-ADJUSTING THE
MONITOR LEVELS
To listen in privacy or monitor the au-
dio source inputs so you can locate an
exact passage or section before mix-
OUTPUT LEVEL
of 0 on the
VU
meters.
MAIN OUTPUT
ing it into the
, insert a
pair of stereo headphones (not sup-
plied) equipped with a 1/4-inch plug
(illus)
PHONES
into the
jack on the lower left
front corner of the mixer. Your local
Radio Shack store sells a wide selec-
tion of headphones.
MIC
6. Temporarily set the
main vol-
0
ume control to .
7. Repeat Steps 4 through 7 to con-
nect and adjust the preset levels
of all your other audio input
sources.
(illus)
Notes:
1. Set the volume control of the input
sources to be monitored to their
minimum settings.
• Do not connect the high-level out-
puts of an audio source to the low-
PHONO
CERAMIC
2
level
(ceramic) jacks.
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2. Set MONITOR to MIC to select the
Listening Safely
remote microphone.
Do not listen at extremely high volume
levels. Extended, high-volume listen-
ing can lead to permanent hearing
loss.
(illus)
Follow these guidelines to protect your
hearing, especially when you use
headphones.
: The DJ’s microphone input
cannot be monitored.
Note
• Always start by setting the volume
to the lowest level possible before
you begin listening. Put the ear-
phone or headsets on, then grad-
ually increase the volume as
necessary.
3. Set MONITOR LEVEL to approxi-
mately halfway between mini-
mum and maximum.
(illus)
• Once you set the volume, do not
increase it. Over a period of time,
your ears adapt to the volume
level, so a volume level that does
not cause discomfort might still
damage your hearing.
4. Adjust the volume control of the
input source you selected until
you hear the signal in the head-
phones at the desired level.
As you begin to mix, be
Caution:
: Be careful not to acci-
Caution
careful not to get into the habit of al-
ways increasing volume levels to
achieve the proper balance. You can
bring high levels down just as easily
as bring low levels up. Try to keep the
independent level controls in the mid-
dle position (3 to 8), and adjust the
overall volume with the MASTER vol-
ume control as well as the volume
control of your input audio equipment.
Listening at excessive volume levels
will soon give you ‘’tired ears’’ and you
won’t be as pleased with your finished
product later.
dentally slide up the main volume
control of the monitored source
before you are ready to put it “on
the air.”
5. Repeat Steps 1 through 4 to
select and preadjust the monitor
volume level of the rest of the
audio input sources (PHONO 1,
PHONO 2, LINE 1, or LINE 2) you
want to monitor.
To monitor an audio input source, sim-
ply select the desired MONITOR switch
and use MONITOR LEVEL to adjust the
volume as desired.
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OPERATION
5. Set ECHO BYPASS/ON to ON to
produce an ECHO effect and to
BYPASS to eliminate the ECHO
effect. (See “Using Echo.”)
BASIC OPERATION
You can mix up to 6 inputs at the
same time and use the built-in equal-
izer and echo generator to tailor the
sound as desired.
6. Push in EQUALIZER BYPASS/ON
to ON to operate the right and left
7-channel frequency equalizer
controls. (See “Using the 7-Band
Frequency Equalizer.”)
1. Set MASTER to approximately 5.
2. Set the switch above each volume
control to select the input you
want to activate. (For example, set
MIC HI/LOW to HI when you use a
high impedance microphone, or
LOW when you use a low imped-
ance microphone.
7. When two turntables (or other
audio components connected to
the PHONO 1 and PHONO 2 inputs)
are playing at the same time, slide
FADER (PHONO 1/PHONO 2):
• Left, to fade in the volume of
PHONO 1 and fade out the vol-
ume of PHONO 2.
(illus)
• Right, to fade in the volume of
PHONO 2 and fade out the vol-
ume of PHONO 1.
Note: This lets you quickly and
smoothly change from playing
PHONO 1 to playing PHONO 2 (or
vice versa).
3. Adjust the corresponding volume
level control to obtain a reading of
0 on the OUTPUT LEVEL VU
meters.
8. Set the MASTER volume to the
OUTPUT LEVEL VU
Note: The
desired volume.
meter indicates the output signal
levels of the left and right chan-
nels.
9. Set POWER OFF/ON to OFF to turn
off the mixer’s power. The VU
meters lights go off.
4. Adjust MONITOR LEVEL clock-
wise to increase the main (DJ)
microphone’s volume; rotate it
counterclockwise to decrease the
volume.
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Standby
USING THE “DJ’S”
MICROPHONE
MIC INPUT
To disable the
microphone,
NORMAL/STANDBY/TALKOVER
set
to
STANDBY
.
Normal
MIC LEVEL
Note: Set
to minimum (full
For equal blending of voice and mu-
counterclockwise) when the micro-
phone is not in use.
NORMAL/STANDBY/TALKOVER
sic, set
NORMAL
. In the
NORMAL
to
mode, the
MIC
“DJ”
input is mixed to blend equal-
ly with all the main volume inputs
USING ECHO
MIC PHONO 1 PHONO 2 LINE 1
(
,
,
,
, and
LINE 2
LEVEL
). You can adjust
to in-
The echo mode is applied to the
sound after all the inputs are mixed.
crease or decrease the microphone
level without affecting the main vol-
ume inputs.
ECHO BYPASS/ON
ON
Set
the echo mode and activate the
LAY REPEAT ECHO
to
to turn on
DE-
Talkover
and
functions. Set
BYPASS
BYPASS/ON
to
to turn off the
Start with a microphone level that
gives a VU reading of 5 to 3.
echo mode.
DELAY
The
measured time delay to simulate an
DELAY
control lets you induce a
NORMAL/
To talk over music, set
STANDBY/TALKOVER TALKOVER
to
.
echo. Set
to full counterclock-
0
wise for a minimum ( ) time delay and
to full clockwise for a maximum time
delay.
The mixer automatically reduces all
MIC PHONO
the main volume inputs (
1 PHONO 2 LINE 1 LINE 2
, and ) just
,
,
,
enough for you to hear yourself in the
headphones or speakers (over the
music).
REPEAT
The
the length of time a tone is repeated
REPEAT 10
control lets you control
(reverberation). Set
to
for
the longest time and to 0 for the short-
est time.
NOR-
When you finish speaking, set
MAL/STANDBY/TALKOVER STAND-
to
. The mixer automatically returns all
BY
the main volume inputs to their origi-
nal levels.
(illus)
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EQUALIZER BYPASS/ON
ON
Set the
switch to
USING THE 7-BAND
FREQUENCY
EQUALIZER
to turn on the frequency
equalizer. Then slide the control up to
boost the indicated frequency range or
down to reduce it.
With the seven sliding frequency con-
trols, you can tailor the sound pro-
cessed through the mixer to fit the
acoustic surroundings and your per-
sonal taste.
Notes:
• If you set the control to the center
position, the frequency range is
unaltered.
Each control varies by ±12 dB the lev-
el of a narrow band of frequencies
centered around the frequency noted
between the controls (60 Hz, 150 Hz,
400 Hz, 1 kHz, 2.4 kHz, 6 kHz, and 15
kHz).
• In order to provide smooth fre-
quency control, the effect of these
controls must overlap slightly.
Thus, the 1 kHz control has a
slight effect on the range of fre-
quencies covered by the 400 Hz
and the 2.4k Hz controls.
Frequency
Purpose
60 Hz
150 Hz
400 Hz
1 kHz
Adjusts the frequencies in the low bass range (low organ notes
and bass drums). Reduces rumble or other low-frequency noise
Adjusts the frequencies in the low to middle bass range (low
organ notes, bass drums, timpani and some low-bass)
Adjusts frequencies in the middle-bass range (timpani and
some low-bass instruments)
Adjusts the range of frequencies in the middle frequency range
where the ear is most sensitive (vocals).
2.4 kHz
Adjusts the range of frequencies in the upper middle frequency
range that include vocals and some upper-midrange instru-
ments (clarinet and saxophone)
6 kHz
Adjusts the range of frequencies in the lower high frequency
range that include some vocals and upper-midrange instru-
ments (clarinet and saxophone).
15 kHz
Adjusts high-frequency sounds (cymbals, flutes, and violins).
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TROUBLESHOOTING
Your SSM-1000 Mixer should require very little maintenance. If you do have prob-
lems, refer to the troubleshooting chart below for possible solutions.
Caution: Only a qualified service technician should perform repairs on this SSM-
1000 Mixer!
Problem
Solution
Check the AC power connection.
Make sure the AC outlet is ‘’live’’.
Nothing works
Check the power connections to the rest of the system
(amplifier/receiver, etc.)
Check the control setting.
No signal from an
audio input source.
Check the connections between the mixer and the input
source.
Hum from PHONO
Connect the turntable’s ground wire (usually black or
green) to one of the GND screws on the back of the
mixer.
Hum from other
inputs
Make sure there are no low level inputs connected to the
LINE 1 and 2 jacks.
Feedback “squeals”
Move the microphone farther away from the output
speakers or use a directional microphone.
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CARE AND MAINTENANCE
Your Radio Shack Audio SSM-1000 Mixer with Echo is an example of superior de-
sign and craftsmanship. The following suggestions will help you care for your SSM-
1000 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 normal 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.
CLEANER
Do not use harsh chemicals, cleaning solvents, or strong detergents
to clean the mixer.
Modifying or tampering with the mixer’s internal components can cause a malfunc-
tion and might invalidate your mixer’s warranty (and void your FCC authorization to
operate it). If your mixer is not performing as it should, take it to your local Radio
Shack store for assistance.
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SPECIFICATIONS
Input Impedance
Microphone ..................................................................................600 ohm (Low)
10k ohm (High)
Phono Magnetic 1 and 2........................................................................50k ohm
Phono Ceramic 1 and 2 .......................................................................100k ohm
Line 1 and 2 .........................................................................................100k ohm
Output Level (Tape Out/Main Out).................................................................. 2V
Sensitivity (Master volume at 10 (Max) position)
Microphone .................................................................................... 0.5 mV (Low)
2.5 mV (High)
Phono Magnetic 1 and 2............................................................................. 3 mV
Phono Ceramic 1 and 2 .................................................................................. 2V
Line 1 and 2 (±3 dB Range)............................................................... 20–20 kHz
Signal-to-Noise (S/N) Ratio
Microphone ................................................................................................ 55 dB
Phono Magnetic 1 and 2............................................................................ 65 dB
Line 1 and 2 ............................................................................................... 70 dB
(T.H.D. at rated output (From 20 Hz to 20 kHz at Maximum Master Volume)
0.05 %)
Channel Separation at 1 kHz ........................................................................... 60 dB
Maximum Input Level
Microphone ................................................................................................. 7 mV
Phono Magnetic 1 and 2........................................................................... 20 mV
Phono Ceramic 1 and 2 .............................................................more than 1.2 V
Line 1 and 2 (at Maximum Master Volume) .................................. more than 1 V
Control Frequency Accuracy.................................................................. +/- 10 %
(at 60 Hz, 150 Hz, 400 Hz, 1k Hz, 2.4k Hz, 6k Hz, 15k Hz)
Control Range at Rated Output ............................................................+/- 12 dB
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NOTES
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RADIO SHACK LIMITED WARRANTY
This product is warranted against defects for 1 year from date of purchase from Radio
Shack company-owned stores and authorized Radio Shack franchisees and dealers.
Within this period, we will repair it without charge for parts and labor. Simply bring your
Radio Shack sales slip as proof of purchase date to any Radio Shack store. Warranty
does not cover transportation costs. Nor does it cover a product subjected to misuse or
accidental damage.
EXCEPT AS PROVIDED HEREIN, RADIO SHACK MAKES NO EXPRESS WARRAN-
TIES AND ANY IMPLIED WARRANTIES ARE LIMITED IN DURATION TO THE DURA-
TION OF THE WRITTEN LIMITED WARRANTIES CONTAINED HEREIN. Some states
do not permit limitation or exclusion of implied warranties; therefore, the aforesaid limi-
tation(s) or exclusion(s) may not apply to the purchaser.
This warranty gives you specific legal rights and you may also have other rights which vary from
state to state.
We Service What We Sell
9/94
RADIO SHACK
A Division of Tandy Corporation
Fort Worth, Texas 76102
#A5
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