Radio Shack 4-Channel Stereo Microphone Mixer User`s guide

32-2056
4-Channel Stereo
Microphone Mixer
Your RadioShack 4-Channel Stereo Microphone Mixer is a
sophisticated control center. It enables you to mix and add sound
from up to four microphones or two audio input sources, such as
a CD player, tuner, or cassette player. It is ruggedly constructed for
home or professional use.
Thank you for purchasing your 4-Channel Stereo Microphone
Mixer from RadioShack.
what’s included
mixer
user’s guide
Please read this user’s guide before installing,
setting up and using your new product
www.radioshack.com
The Basics
contents
Important Safety Instructions .................... 3
setting up your mixer ................................. 6
installing batteries ...............................................................6
using AC power ..................................................................6
presetting the mixer ...........................................................7
connections ............................................... 8
two stereo inputs .................................................................8
four monaural inputs ..........................................................8
two monaural sources as stereo inputs .............................8
four microphones ...............................................................9
outputs ................................................................................9
operation ................................................ 10
mixing mono or stereo ......................................................10
voice-overs .......................................................................11
accessories ................................................ 11
specifications ............................................ 12
2
The Basics
Important Safety Instructions
Read Instructions — All safety and operating instructions should be
read before the appliance is operated.
Retain Instructions — The safety and operating instructions should
be retained for future reference.
Heed Warnings — Follow all warnings on the appliance and in the
operating instructions.
Cleaning — Unplug this appliance from the wall outlet before
cleaning. Use only a damp cloth for cleaning. Do not use liquid or
aerosol cleaners.
Water and Moisture — Do not use this appliance near water (for
example, near a bathtub, washbowl, kitchen sink, or laundry tub; in
a wet basement; or near a swimming pool).
Mounting Accessories — Do not place this appliance on an
unstable cart, stand, tripod, bracket, or table. The appliance may
fall, causing serious injury to a child or adult, and serious damage
to the appliance.
Ventilation —Do not place the appliance on a bed, sofa, rug,
or other similar surface. Do not place the appliance in a built-in
installation such as a bookcase or rack unless it provides proper
ventilation as specified by the manufacturer.
Heat — The appliance should be situated away from heat sources
such as radiators, heat registers, stoves, or other appliances
(including amplifiers) that produce heat.
Power Sources — Operate this appliance using only the power
source indicated on its marking label. If you are not sure of your
home’s power type, consult your appliance dealer or local power
company.
Polarized Power Cord Plug — This appliance is equipped with a
polarized power cord plug (a plug having one blade wider than the
other).This plug will fit in the power outlet only one way. This is
a safety feature. If you cannot insert the plug fully into the outlet,
try reversing the plug. If the plug still doesn’t fit, contact your
3
The Basics
electrician to replace your obsolete outlet. Do not defeat the safety
purpose of the polarized plug.
Power-Cord Protection — Route power-supply cords so they are
not likely to be walked on or pinched by items placed on or against
them, paying particular attention to cords at plugs, convenience
receptacles, and the point where they exit from the appliance.
Power Lines — An outside antenna system should not be located
in the vicinity of overhead power lines or other electric light or
power circuits, or where it can fall into such power lines or circuits.
When installing an outside antenna system, extreme care should be
taken to keep from touching such power lines or circuits as contact
with them might be fatal.
Nonuse Periods — The power cord of the appliance should be
unplugged from the outlet when the appliance is to be left unused
for a long period of time.
Overloading — Do not overload wall outlets, extension cords, or
integral convenience receptacles, as this can result in a risk of fire
or electric shock.
Objects and Liquids — Never push objects of any kind into this
appliance through openings, as they may touch dangerous voltage
points or short out parts that could result in a fire or electric shock.
Never spill liquid of any kind on the appliance.
Carts and Stands — If the appliance is used with a cart or
stand, the cart or stand should be a type recommended by the
manufacturer. An appliance and cart combination should be moved
with care. Quick stops, excessive force, and uneven surfaces cause
the appliance and cart combination to overturn.
Damage Requiring Service — Unplug this appliance from the wall
outlet and refer servicing to qualified service personnel under the
following conditions:
4
The Basics
* When the power-supply cord or plug is damaged.
* If liquid has been spilled or objects have fallen into the appliance.
* If the appliance has been exposed to rain or water.
* If the appliance does not operate normally by following the
operating instructions. Adjust only those controls that are
covered by the operating instructions, as an improper adjustment
of other controls may result in damage and will often require
extensive work by a qualified technician to restore the appliance
to normal operation.
* If the appliance has been dropped or damaged in any way.
* When the appliance exhibits a distinct change in performance.
Servicing — Do not attempt to service this appliance yourself, as
opening or removing covers may expose you to dangerous voltage
or other hazards. Refer all servicing to qualified service personnel.
Replacement Parts — When replacement parts are required, be
sure the service technician has used replacement parts specified by
the manufacturer or have the same characteristics as the original
part. Unauthorized substitutions may result in fire, electric shock or
other hazards.
Safety Check — Upon completion of any service or repairs to this
appliance, ask the service technician to perform safety checks to
determine that the appliance is in proper operating condition.
Lightning — For added protection for this product during a
lightning storm, or when it is left unattended and unused for long
periods of time, unplug it from the wall outlet. This will prevent
damage to the product due to lightning and power line surges.
Attachments — Do not use attachments not recommended by the
product manufacturer as they may cause hazards.
Wall or Ceiling Mounting — The product should be mounted to a
wall or ceiling only as recommended by the manufacturer.
5
The Basics
setting up your mixer
installing batteries
Your can power the mixer with a 9-volt battery (not supplied).
1. Remove the battery
compartment cover.
2. Insert the battery.
3. Replace the cover.
Replace the battery when
BATTERY LOW lights.
using AC power
Your can power your mixer with a 9V AC adapter (not supplied).
The recommended AC adapter supplies nine volts of power and
delivers 300 milliamps. Its plug properly fits the mixer’s DC 9V jack
and its center tip is set to negative (–). Using an adapter that does
not meet these specifications could damage the mixer or adapter.
Insert the AC adapter’s barrel plug into the mixer’s DC 9V jack. Plug
the AC adapter’s other end into a standard AC outlet.
DC 9V
Always connect the AC adapter to the mixer before you connect
it to AC power. When you finish, disconnect the adapter from AC
power before you disconnect it from the mixer.
6
The Basics
presetting the mixer
To prevent accidental audio mixing or channel overdrive, adjust the
mixer’s controls as shown before you turn on power.
Set MONO/STEREO to MONO.
Turn POWER to OFF.
Slide CHANNEL 1-4 to 0 (minimum).
A sudden high output from the mixer could damage audio devices
connected to the mixer, and could damage your hearing, especially
if you use headphones.
presetting the audio devices
To avoid sudden sound outputs from connected audio devices,
adjust the volume of the connected audio device to its lowest level.
Make sure you power off the devices before you connect them to
the mixer.
7
The Basics
connections
Use shielded audio cables (available at RadioShack) for all input
connections. The connected input source’s signals are routed
to the corresponding channel on the mixer. For example, if you
connect a CD player to AUX 1 L and AUX1 R, you will adjust CHANNEL 1
and CHANNEL 2 to mix and play audio. See “Operation” on Page 10.
AUX 2 L and R
AUX 1 L and R
OUTPUT L and R
two stereo inputs
Connect the line level outputs from one device to the mixer’s AUX 1
INPUT R and L jacks. Connect the line level outputs from the second
device to the mixer’s AUX 2 INPUT R and L jacks.
four stereo sources as monaural inputs
Use shielded Y-adapters at each source’s left and right outputs, and
connect a separate stereo source to each input jack (AUX 1 R, AUX 1 L,
AUX 2 R, or AUX 2 L) on the mixer.
four monaural inputs
Connect each monaural device to each input jack (AUX 1 R, AUX 1 L,
AUX 2 R, or AUX 2 L) on the mixer.
two monaural sources as stereo inputs
Use shielded Y-adapters at each source’s monaural outputs, and
connect one source to AUX 1 R and L. Connect the other source to
AUX 2 R and L.
8
The Basics
four microphones
MIC jacks
Connect up to four microphones to the mixer’s MIC jacks (1-4). Each
microphone signal is routed to the mixer’s corresponding channel.
If you connect an audio device and a microphone so they are
output to the same channel, the signals from both devices are
mixed and controlled by the mixer’s corresponding channel
control. For example, if you connect a microphone to MIC 1 and a
CD player to AUX 1 L and R, signals from the microphone and CD
player are routed to CHANNEL 1.
outputs
To play the mixer’s output through your speaker system (at parties,
dances, conferences), use an audio patch cord (not supplied) to
connect the mixer’s OUTPUT L and R jacks to your receiver/amplifier’s
line input jacks.
To record the mixer’s output, use an audio patch cord to connect
the mixer’s OUTPUT L and R jacks to your tape deck’s line input jacks.
9
The Basics
operation
1. Set POWER to ON to turn on the mixer. To avoid popping sounds,
always turn on the mixer before you turn on the amplifier.
2. Turn on the output amplifier and leave its volume set to
minimum.
3. Set the audio input source’s volume to minimum. Turn on
the source, and set it to play (or continuously talk into the
microphone).
4. Adjust the mixer’s corresponding CHANNEL 1, CHANNEL 2, CHANNEL 3,
or CHANNEL 4 to 6-10. When mixing more than one audio input,
adjust each input’s volume to about the same listening level.
5. Adjust the output amplifier’s volume as desired.
6. When you are finished mixing, turn off the mixer, the output
amplifier, and all audio input sources.
mixing mono or stereo
To mix mono signals with stereo signals, set STEREO/MONO to STEREO.
When STEREO/MONO is set to MONO:
• The mixer routes monaural input signals of devices connected
(separately) to the mixer’s AUX 1 L, AUX 1 R, AUX 2 L, AUX 2 R jacks to
both outputs (AUX 1 L and R, AUX 2 L and R).
• The mixer changes stereo input signals of devices connected to
the mixer’s AUX 1 L/R and AUX 2 L/R jacks to monaural signals.
For mono amplifiers (found in some PA systems), it is best to set
MODE STEREO/MONO to MONO.
10
The Basics
voice-overs
Talk into a microphone to mix pre-recorded music or sound from
an audio input source with your voice.
1. Before talking, adjust CHANNEL (corresponding to the connected
audio source) to the desired volume level.
2. As the music plays, talk into the microphone. Adjust the
microphone and audio levels so you can hear yourself over the
music.
3. If you pause and stop talking or singing, adjust CHANNEL to its
original position (step 1).
4. When you are finished, adjust the microphone’s volume to 0 and
the audio source’s CHANNEL to its original position (step 1).
accessories
One 9V battery
One 9V DC Adapter
Audio Patch Cord
Shielded Y-adapters
Shielded Audio Cables for all connections
11
specifications
Input Sensitivity:
Mic ...................................................................................... 1.5 mV/600 ohm
Line ...................................................................................... 150 mV/ 27k ohm
Output Level at 10k Ohm Load .............................................................. 1.2V
Input Overload:
Mic ..................................................................................... more than 250 mV
Line ............................................................................................ more than 6V
Distortion ............................................................................... less than 0.2%
Signal-to-Noise Radio .........................................................better than 60 dB
Frequency Response ................................................. 10 ~ 35,000 Hz ± 3 dB
Power Requirements:
DC ............................................................................................ one 9V battery
AC Adapter ....................................................................DC IN 9VDC, 300 mA
AC OUT 120V AC, 60 Hz
Dimensions (HWD) .................................................. 23/16 x 105/8 x 65/16 inches
(5.5 x 27 x 16 cm)
Weight ............................................................................. 1 lb 10.5 oz. (850 g)
Specifications are typical; individual units might vary. Specifications are
subject to change and improvement without notice.
limited one year warranty
This product is warranted by RadioShack against manufacturing defects in material 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. For complete warranty details and exclusions, check
with your local RadioShack store.
RadioShack Customer Relations
200 Taylor Street, 6th Floor, Fort Worth, TX 76102
04/04
Printed in China
32-2056
06A04
©2004. RadioShack Corporation.
All rights reserved. RadioShack and RadioShack.com are
trademarks used by RadioShack Corporation.