Radio Shack SM-1000, 32-3001 User Manual

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Audio Mixer with Echo (Rack Mount Type)

Cat. No. 32-3001

OWNER’S MANUAL

Please read before using this equipment.

SM-1000

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FEATURES

Your Radio Shack SSM-1000 Audio
Mixer with Echo is a sophisticated
control center for recording from multi­ple playback sources such as a CD
player, tuner, turntable, or VCR, or
from live performances. A s even band
equalizer and an echo effect are incor­porated into the mi xer so you can tai­lor the sound to compensate for
environmental conditions or for per­sonal preference. The mixer’s many
features give you almost limitless
sound combinations.

Its features include:

7-Band Frequenc

Equalizer

— al­lows you to tailor the sound output to
your preference.

Two Pairs of Stereo PHONO Inputs

— for using turntables with either
magnetic or ceramic cartridges.

Stereo Line Inp ut s

— let you connect
most high level audio sources, such
as a tape deck, amplifier, tuner, or
VCR.

Low-Noise Tape Out Jack

— for

high-quality tape recording.

Monitor Controls

— let you he ar and
check line inputs using headphones
before mixing.

Normal/Standb

/Talkover Switch

—
lets you control when you talk with
music, talk over music, or talk without
interrupting the music or being heard
through the mixer, to give you a “DJ’s”
control.

Phono 1/Phono 2 Fader Control

—
allows you to quickly and smoothly
switch between playing PHONO 1 and
PHONO 2.

Monit orin

Controls

— lets you lis­ten to the outputs of MIC, PHONO 1,
PHONO 2, LINE 1, LINE 2, or MAS­TER through headphones.

To obtain best performance of your
audio SSM-2200 Mixer, please read
this manual carefully before you con­nect it to other audio components.

For your important records, we recom­mend you record this unit’s serial
number in the space provided. You’ll
find the serial number on the bottom of
the unit.

Slide Controls

— for fingertip control

Serial Number:

of sound mixing and fading adjust­ments.

© 1995 Tandy Corporation.

Radio Shack is a registered trademark used by Tandy Corporation.

All Rights Reserv ed .

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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 Operat io n .......... .............. ....... .............. .............. .............. ........ .............. .7

Using The “DJ’s” Microphone............................................................................8

Normal........................................................................................................8

Talkover...................................................................................................... 8

Standby ......................................................................................................8

Using Echo........................................................................................................8

Using the 7-Band Frequency Equalizer ........................................................ ....9

Troubleshootin

Care and Maintenance........................................................................................11

Specifications......................................................................................................12

Warnin

ture.

: To prevent fire or shock hazard, do not expose this mixer to rain or mois-

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 import ant operating and main­tenance instructions are included in the literature accompanyi ng this mix-

!

er.

..................................................................................................10

CAUTION

RISK OF ELECTRIC SHOCK.

DO NOT OPEN.

CAUTION

ELECTRIC SHOCK, DO NOT REMOVE
COVER OR BACK. NO US ER-SERVIC E­ABLE PARTS INSIDE. REFER SERVIC­ING TO QUALIFIED PERSONNEL.

: TO REDUCE THE RISK OF

!

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PREPARATION

CONNECTING THE
OUTPUTS

Connect your amplifier and a cassette
recorder to the audio output jacks on
the back of the mixer.

(illus - show the
left and ri

ht out-

put jacks.)

1. Connect the amplifier’s left and
right input jacks to the mixer’s

MAIN OUT

mixer’s sound.

2. Connect the tape recorder’s left
and right input jacks to the mixer’s

TAPE OUT

the mixer’s sound.

output jacks to play the

output jacks to record

1. Connect the AC power cord to a
standard AC outlet.

2. Before turning on the power:

•Set

•Set

•Set

•Set

MIC, PHONO 1, PHONO 2

LINE 1

OVER

MONITOR LEVEL

terclockwise to minimum.

EQUALIZER BYPASS/ON

BYPASS

LINE 2

, and

NORMAL/STANDBY/TALK-

STANDBY

to

.

to 0.

.

fully coun-

to

(illus)

3. Set

POWER OFF/ON

on the mixer’s power. The VU
meters and the power indicator
lights.

to ON to turn

,

CONNECTING INPUTS
AND PRESETTING
LEVELS

Connect your audio sources (AM/FM
tuners, CD players, cassette decks, or
phonograph players) to the audio in­put jacks on the back of the mixer.

(illus - show the
left and right input
jacks.)

4

4. Connect a high-quality micro­phone with a

MIC

terminal.

: This is the remote (guest)

Note

microphone.

MIC

5. Set

main volume control to 5.

1

/4-inch plug to the

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Note: You can set the control to
any other position (except
However, to get an accurate pre­set, all the volume controls must
set to the exact same position.

0

(illus)

5. While you use the microphone,
insert a flat bladed screwdriver
into the slot above the corre­sponding volume control and
adjust it until you obtain a reading

0

of

on the

meters.

OUTPUT LEVEL

VU

(illus)

MIC

6. Temporarily set the
ume control to

0

.

main vol-

• Except for the

).

inputs, you can connect a ny hi gh­level audio source (tuner, cassette
tape deck, CD player, magnetic­cartridge turntable, or VCR) to any
set of input jacks.

• Connect the ground wires (usua lly
black or green) from your mag­netic cartridge turntable to the

GND

screw terminal on the back of

the mixer.

PHONO

ceramic

PRE-ADJUSTING THE
MONITOR LEVELS

To listen in privacy or monitor the au­dio source inputs so you can locate an
exact passage or section before mix­ing it int o the
pair of stereo headphones (not sup­plied) equipped with a
into the
front corner of the mixer. Your local
Radio Shack store sells a wide selec­tion of headphones.

MAIN OUTPUT

PHONES

, insert a

1

/4-inch plug

jack on the lowe r l eft

7. Repeat Steps 4 t hrough 7 to con­nect and adjust the preset levels
of all your other audio input
sources.

Notes:

• Do not connect the h igh-level out­puts of an audio source to the low­level
(ceramic) jacks.

PHONO CERAMIC 2

(illus)

1. Set the volume control of the input
sources to be monitored to their
minimum setti n gs.

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2. Set

MONITOR

to

MIC

to select the

remote microphone.

(illus)

: The DJ’s microphone input

Note

cannot be monitored.

3. Set

MONITOR LEVEL

to approxi­mately halfway between mini­mum and maximum.

(illus)

4. Adjust the volume control of the
input source you selected until
you hear the signal in the head­phones at the desired level.

Caution

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 2, LINE 1

want to monitor.

To monitor an audio input source, sim­ply select the desired
and use
volume as desired.

: Be careful not to acci-

PHONO 1

LINE 2

, or

MONITOR

MONITOR LEVEL

to adjust the

) you

switch

Listening Safely

Do not listen at extremely high volume
levels. Extended, high-volume listen­ing can lead to permanent hearing
loss.

Follow these guidelines to protect your
hearing, especially when you use
headphones.

• Always start by setting the vo lume
to the lowest level possible before
you begin listening. Put the ear­phone or headsets on, then grad­ually increase the volume as
necessary.

• 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.

Caution:

careful not to get into the habit of al­ways increasing volume levels to
achieve the proper balance. You can
bring high levels down just as easily
as bring low levels up . Try to k eep t he
independent level controls in the mid­dle position (
overall volume with the

,

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 f ini shed
product later.

As you begin to mix, be

3

to 8), and adjust the

MASTER

vol-

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OPERATION

BASIC OPERATION

You can mix up to 6 inputs at the
same time and us e the built-in equal­izer and echo generator to tailor the
sound as desired.

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 impe d-

ance microphone.

(illus)

3. Adjust the corresponding volume
level control to obtain a reading of

0

on the

meters.

: The

Note

meter indicates the output signal
levels of the left and right chan­nels.

4. Adjust
wise to increase the main (DJ)
microphone’s volume; rotate it
counterclockwise to decrease the
volume.

OUTPUT LEVEL

OUTPUT LEVEL

MONITOR LEVEL

VU

VU

clock-

5. Set

ECHO BYPASS/ON

to ON to

produce an ECHO effect and to

BYPASS

to eliminate the ECHO

effect. (See “Using Echo.”)

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. ”)

7. When two turntables (or other
audio components connected to

PHONO 1

the

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

ume of

and fade out the vol-

PHONO 2

.

• Right, to fade in the volume of

PHONO 2

ume of

: This lets you quickly and

Note

and fade out the vol-

PHONO 1

.

smoothly change from playing

PHONO 1

to playing

PHONO 2

(or

vice versa).

8. Set the

MASTER

volume to the

desired volume.

9. Set

POWER OFF/ON

to

OFF

to turn
off the mixer’s power. The VU
meters lights go off.

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USING THE “DJ’S”
MICROPHONE

Normal

For equal blending of voice and mu­sic, set
to
“DJ”
ly with all the main volume inputs

MIC, PHONO 1, PHONO 2, LINE 1

(

LINE 2

crease or decrease the microphone
level without affecting the main vol­ume inputs.

Talkover

Start with a microphone level that
gives a VU reading of

To talk over music, set

STANDBY/TALKOVER

The mixer automatically reduces all
the main volume inputs (

1

enough for you to hear yourself in the
headphones or speakers (over the
music).

When you finish speaking, set

MAL/STANDBY/TALKOVER
BY

the main volume inputs to their origi­nal levels.

NORMAL/STANDBY/ TALKOVER

NORMAL

. In the

MIC

input is mixed to blend equal-

). You can adjust

PHONO 2, LINE 1

,

NORMAL

LEVEL

5

to 3.

TALKOVER

to

MIC, PHONO

, and

mode, the

to in-

NORMAL/

LINE 2

) just

NOR-

STAND-

to

. The mixer automatically returns all

, and

.

Standby

To disable the

NORMAL/STANDBY/TALKOVER

set

STANDBY

Note

: Set
counterclockwise) when the micro­phone is not in use.

MIC INPUT

.

MIC LEVEL

microphone,

to

to min imu m (ful l

USING ECHO

The echo mode is applied to the
sound after all the inputs are mixed.

ECHO BYP ASS/ON

Set
the echo mode and activate the

LAY
BYPASS/ON

and

REPEAT

to

to ON to turn on

functions. Set

BYPASS

to turn off the

DE-

ECHO

echo mode.

DELAY

The

control lets you induce a
measured time delay to simulate an
echo. Set
wise for a minimum (

DELAY

to full counterclock-

0

) time delay and
to full clockwise for a maximum time
delay.

REPEAT

The

control lets you control
the length of tim e a tone is repeated
(reverberation). Set

REPEAT

to 10 for
the longest time and to 0 for the short­est time.

(illus)

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USING THE 7-BAND
FREQUENCY
EQUALIZER

With the seven sliding f requency con­trols, you can tailor the sound pro­cessed through the mixer to fit the
acoustic surroundings and your per­sonal taste.

Each control varies by ±12 dB the lev ­el of a narrow band of frequencies
centered around the frequenc y noted
between the controls (60 Hz, 150 Hz,
400 Hz, 1 kHz, 2.4 kHz, 6 kHz, and 15
kHz).

Frequency Purpose

60 Hz Adjusts the frequencies in the low bass range (low organ notes

and bass drums). Reduces rumble or other low-frequency noise

150 Hz Adjusts the frequencies in the low to middle bass range (low

organ notes, bass drums, timpani and some low-bass)

Set the
switch to ON to turn on the frequency
equalizer. Then slide the cont rol up to
boost the indicated frequency range or
down to reduce it.

Notes

• If you set the control to the center
position, the frequency range is
unaltered.

• In order to provide smooth fre­quency control, the effect of these
controls must overlap slightly.
Thus, the 1 kHz control has a
slight effect on the range of fre­quencies covered by the 400 Hz
and the 2.4k Hz controls.

EQUALIZER BYPASS/ON

:

400 Hz Adjusts frequencies in the middle-bass range (timpani and

some low-bass instruments)

1 kHz 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 instru­ments (clarinet and saxophone)

6 kHz Adjusts the range of frequencies in the lower high frequency

range that include some vocals and upper-midrange instru­ments (clarinet and saxophone).

15 kHz Adjusts high-frequency sounds (cymbals, flutes, and violins).

9

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TROUBLESHOOTING

Your SSM-1000 M ixer should require very little maintenanc e. If you do have prob­lems, refer to the troubleshooting chart below for possible solutions.

Caution

1000 Mixer!

Nothing works

No signal from an
audio input source

Hum from PHONO Connect the turntable’s ground wire (usually black or

Hum from other
inputs

Feedback “squeals” Move the microphone farther away from the output

: Only a qualified service technician should perform repairs on this SSM-

Problem Solution

Check the AC power connection.
Make sure the AC outlet is ‘’li ve’’.
Check the power connections to the rest of the system

(amplifier/receiver, etc.)
Check the control setting.
Check the connections between the mixer and the input

.

source.

green) to one of the GND screws on the back of the
mixer.

Make sure there are no low level inputs connected to the
LINE 1 and 2 jacks.

speakers or use a directional microphone.

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CARE AND MAINTENANCE

Your Radio Shack Audio SS M -1000 M ixer wi th Echo is an exa mple of superio r de­sign and craftsmanship. The following suggestions will help you care for your SSM­1000 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.

CLEANER

Do not use harsh chemicals, cleaning solvents, or strong detergents
to clean the mixer.

Modifying or tampering with the mi xer’s internal co mponent s c an caus e a m alfunc ­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

Wipe the mixer with a damp cloth occasionally to keep it looking new.

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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 out put (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 prod u ct is wa rr ante d agai nst defe ct s for 1 yea r from date of pu rcha se from R adi o
Shack co mpany-own ed stores an d authorize d Radio Shack f ranchisee s and dealers .
Within this period, we will repair it without charge for parts and labor. Simply

Radio Shack sales sli p

does not cover transportation costs. Nor does i t cover a product subjected to misuse or
accidental damage.
EXCEPT AS PROVI DED H EREIN, RADI O SHA CK MAKES NO EX PRESS WARRAN­TIES AND ANY IMPLIED WARRANTIES ARE LIMITED IN DURATION TO THE DURA­TION OF THE WRITTEN LIMITED WARRANTIES CONTAINED HEREIN. Some states
do not pe r m it lim i t at io n or ex cl us io n of im p lie d warra n tie s; there f o re, the afo r e sa id li m i­tation(s) or exclusion(s) may not app ly to the purchase r.

This warranty gives you specific l egal rights and y ou may also have other rights which vary from
state to state.

as proo f of purchase date to any Radio Shack store. Warranty

We Se rvi ce What We Sell

bring your

9/94

RADIO SHACK

A Division of Tandy Corporation

Fort Worth, Texa s 76102

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