32-2058 4-Channel Audio Mixer with 3 Band EQ Controls & Echo Your RadioShack 4-Channel Audio Mixer with 3 Band EQ Controls & Echo is perfect for mixing sound from multiple playback sources such as a microphone, tuner, CD player, turntable, or the audio output from a VCR. It is ruggedly constructed for home or professional use. Its volume controls let you adjust sound for playing through your speaker system or for recording. Thank you for purchasing your 4-Channel Audio Mixer from RadioShack.
The Basics contents connections ............................................... 6 using your mixer ...................................... 9 mixing inputs ......................................... 13 using a microphone ................................ 15 using the special controls ....................... 16 using echo .............................................. 18 frequently asked questions .................... 20 replacing the fuse ................................... 21 specifications ...................
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.
The Basics try reversing the plug. If the plug still doesn’t fit, contact your 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.
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.
The Basics connections A sudden high output from the mixer could damage your hearing or damage the audio devices connected to your mixer. Before connecting to AC power, turn off your mixer and all audio devices connected to your mixer. connecting outputs OUTPUT AMP L/R — use an audio patch cord (not supplied) to connect your receiver or amplifier to your mixer (match left to left, right to right). The sound is output to your stereo sound system.
The Basics connecting inputs LINE 1, 2, 3, 4, 5, 6 — connect up to six audio AUX LINE MONO — connect a mono input source here. sources to your mixer. Do not connect audio sources with line-level outputs to the PHONO 1, PHONO 2, or AUX MIC jacks. GND EFFECT SEND/RECEIVE — connect a sound effect device to EFFECT SEND (output) and EFFECT RECEIVE (input). AUX MIC — connect a microphone with a 1 /4-inch plug here. PHONO 1/2 — connect up to two low-level audio sources to your mixer.
The Basics connecting a lamp, headphones and mic DJ MIC — connect a microphone 12V/3W MAX LAMP — connect a 12V with an XLR plug here. DC/3W BNC lamp (not supplied) to light up the mixer’s controls. PHONES — connect a pair of stereo headphones (not supplied) with a 1/4-inch plug. You can then listen and locate a section of music to mix. listening safely Do not listen at extremely high volume levels. Extended, high-volume listening can lead to permanent hearing loss.
The Basics using your mixer 1. Set your output device’s volume to minimum and turn it on. 2. Press POWER to turn on the mixer. 3. Turn on the audio input sources you want to mix. 4. Preset the input signal levels (see “presetting input signal levels”). 5. Mix the audio input sources (see “mixing the inputs” on Page 13). 6. When you are finished, turn off all connected audio devices (amplifiers, tape decks, and so on), and press POWER to turn off the mixer.
The Basics All HIGH, MID, and BASS controls to 0. SEND, RECEIVE, and MASTER set to 0. All GAIN controls set midway between MIN and MAX. DJ MIC LEVEL and AUX LEVEL to 0. CUE LEVEL to 0. CH1, CH2, CH3, and CH4 to 0. SEND ASSIGN and CUE ASSIGN to OFF. presetting audio inputs Before mixing your audio sources (devices connected to LINE 1, PHONO 1, PHONO 2, LINE 2, LINE 3, LINE 4, LINE 5, LINE 6), you must set their input signal level to each channel input (CH1, CH2, CH3, etc.).
The Basics 5. Slowly slide up the channel volume control (CH) until you get a reading of up to 0 dB on both LED meters. 6. Stop playback of the selected input source. 7. Repeat steps 1-7 for each audio input you plan to mix. Notes: • Write down the CH setting for each audio source. Then, when you want to mix that source, you can adjust its volume to that setting.
The Basics 2. While talking, adjust DJ MIC LEVEL or AUX LEVEL until you get a reading of less than 0 dB on both LED meters. See “using an XLR microphone” on Page 16. Notes: • Write down the DJ MIC LEVEL or AUX LEVEL setting. Then, when you want to mix with the microphone, you can adjust it to this setting.
Beyond the Basics mixing inputs You can select any two of your connected audio sources and mix them so one or both play through your sound system. Mixing consists of three parts: playing an input source, monitoring a second input source, and switching to a second input source. playing an input source 1. Set ASSIGN A to the desired audio source (1, 2, 3, 4 correspond to CH 1, CH 2, CH 3, CH 4).
Beyond the Basics monitoring a second input source Monitoring a second input source requires listening to an input source, finding the desired audio section you want to mix, and adjusting it’s sound level to match the volume of the first input source (the one designated ASSIGN A). 1. Connect and put on headphones. You can listen to one source through the headphones while the other source plays over the sound system. 2. Set ASSIGN B to the second input source (1, 2, 3, 4 correspond to CH 1, CH 2, CH 3, CH 4).
Beyond the Basics using a microphone using an XLR microphone To mix the XLR microphone with other audio input sources, adjust DJ MIC LEVEL to increase or decrease microphone volume. Set DJ MIC LEVEL to 0 when you are not using the DJ microphone. using the AUX microphone To mix the AUX microphone with other audio input sources, set AUX MIC/LINE to MIC. Adjust AUX LEVEL to increase or decrease microphone volume. When you are not using the AUX microphone, set AUX MIC/LINE to LINE.
Beyond the Basics using the special controls tone Your mixer has a set of tone controls for each microphone and channels 1– 4. You can tailor the high, middle, and low frequency sounds for each. For normal sound, leave BASS, MID, and HIGH set to 0. Rotate HIGH, MID, or BASS toward +10 to increase, or toward –10 to decrease the high, middle, and low frequency sounds. gain Since the input level of each source is different, you can use GAIN to fine tune each input’s volume.
Beyond the Basics setting the sound balance BALANCE lets you adjust the sound balance between the left and right speakers. If your speakers are properly positioned and your listening area is centered between the speakers, the center setting of the control is usually the best. If the sound seems to be louder from one speaker, adjust BALANCE until the output sounds equally from both speakers.
Beyond the Basics using echo The mixer plays echo effects, and lets you adjust echo delay, number of echo repeats, and the echo’s volume. The echo is applied to the sound before all the inputs are mixed. 1. Set ECHO to MIC to apply the echo effect to the microphones and AUX LINE input. 2. Set ECHO to MUSIC to apply the echo effect to the channel outputs. 3. Set ECHO to OFF to turn off the echo effect. adjusting echo delay, repeat, and volume ECHO DELAY lets you adjust the time interval between echoes.
Beyond the Basics playing input signals through the sound effect device You can play inputs selected by the channel selectors (DJ MIC or AUX) through other sound effect devices connected to the mixer, and control playback through the mixer. To play selected inputs through the sound effect device, set SEND ASSIGN to the selected input. SEND lets you adjust the volume of the selected sound effect device without changing the device’s volume.
Beyond the Basics frequently asked questions Q - I set up my mixer using the instructions. Why doesn’t it work? A - Make sure you are connected to a “live” AC outlet. - Verify that all sources are securely connected. - Check the fuse and replace it if needed. Q - Why is there no signal from my input source? A - Make sure TALK OVER is turned OFF. - Make sure the input source is turned on. - Check the mixer and source control settings. - Check connections between the mixer and input source.
Beyond the Basics replacing the fuse The mixer uses a fuse for protection against surges and short circuits. If the mixer suddenly turns off and will not turn on, check the fuse. If necessary, replace it with a 0.5-amp, 250volt, fast-acting, 11/4 x 1/4 inch fuse (not supplied). 1. Disconnect power from the mixer. 2. Use a Philips screwdriver to remove the fuse compartment cap. 3. Remove the old fuse and insert a new one. Make sure you replace the fuse only with another fuse of the same type and rating.
Beyond the Basics Specifications Input Sensitivity/Impedance DJ MIC (XLR jack) .............. 1.5mV, 600 ohms, balanced/unbalanced AUX MIC (Phone jack) ........................1.5mV, 600 ohms, unbalanced Phono ........................................................................ 3mV/50 kOhms Line ....................................................................... 150 mV/27 kOhms Output Level Main Out ....................................................................... 2V/10 kOhms Record ..........
Beyond the Basics 23
accessories Depending on how you plan to use your mixer, some or all of the following items may be purchased separately: audio patch cord microphone with an XLR plug (DJ mic) microphone with 1/4-inch plug stereo headphones 12V lamp bulb 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.
