Radio Shack Music Mixer 32 3001 User Guide

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.  
!
3
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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.)  
4
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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.  
5
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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.  
6
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32-3001.fm Page 7 Tuesday, August 10, 1999 8:02 AM  
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.  
7
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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)  
8
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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).  
9
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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.  
10  
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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.  
11  
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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  
12  
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NOTES  
13  
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14  
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15  
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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  
Printed in (Site)  
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