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32-3009.fm Page 1 Tuesday, August 10, 1999 8:31 AM
Cat. No. 32-3009
OWNER’S MANUAL
Please read before using this equipment.
SSM-1250
3-Channel Stereo Audio Mixer
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32-3009.fm Page 2 Tuesday, August 10, 1999 8:31 AM Warning: To prevent fire or shock hazard, do not expose this mixer to rain or moisture. 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 SERVICING 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 c
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32-3009.fm Page 3 Tuesday, August 10, 1999 8:31 AM CONTENTS Features ................................................................................................................ 4 Preparation ........................................................................................................... 6 Connecting the Outputs .................................................................................. 6 Connecting the Inputs .............................................................
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32-3009.fm Page 4 Tuesday, August 10, 1999 8:31 AM FEATURES Your Optimus SSM-1250 3-Channel Stereo Audio Mixer is a sophisticated control center, perfect for mixing sound from multiple audio sources on three separate channels such as microphones, tuners, CD players, turntables, or the audio out- puts from VCRs. The mixer is ruggedly constructed for home or professional use. Its wide-range volume controls let you adjust each audio source’s sound level so you can get the best mix for playing th
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32-3009.fm Page 5 Tuesday, August 10, 1999 8:31 AM so you can monitor and prepare it before mixing it in. 14 Cue/Program Control — lets you balance the volume of the output playing on the sound system and the input being prepared for mix- ing through the headphones. 15 Lamp Jack — lets you connect a 12V DC lamp to light the mixer controls. 11 Mono/Stereo Selector — lets you set the output to stereo or 16 Phones Jack — lets you connect monaural. a pair of stereo headphones with 1 a /4-inch plu
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32-3009.fm Page 6 Tuesday, August 10, 1999 8:31 AM PREPARATION Warning: A sudden high output from the mixer could damage your hearing, especially if you use headphones, and might also damage the audio devices illustration of output AMP connected to the mixer’s output. Be- to sound system fore using the mixer, make sure you set your receiver/amplifier’s volume control to its minimum volume level setting. Before you connect the AC power To record the mixer’s output signal, cord, make sure you s
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32-3009.fm Page 7 Tuesday, August 10, 1999 8:31 AM 1. Connect the line-level outputs from up to four audio sources (such as a CD player, tape deck, tuner, camcorder, or VCR) to the LINE 1, LINE 2, LINE 3, and LINE 4 input jacks (matching left to left, right to right). illustration of line-level connections AMP and REC connections should also appear Do not connect an audio source with a line-level output to the low- Caution: level PHONO 1 or PHONO 2 input jacks. 2. Connect the low-level outpu
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32-3009.fm Page 8 Tuesday, August 10, 1999 8:31 AM 3. Connect a microphone (not sup- CONNECTING POWER plied) to the mixer. Connect the power cord to a standard • If the microphone has an XLR AC outlet. plug, connect it to MIC on the top left corner of the front panel. Note: The power cord has a polarized plug that fits only one way into a stan- dard AC outlet. If the plug does not fit, illustration of microphone turn it clockwise so it fits properly. Do plug being inserted into jack not force
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32-3009.fm Page 9 Tuesday, August 10, 1999 8:31 AM Listening Safely CONNECTING HEADPHONES Do not listen at extremely high volume levels. Extended high-volume listening To listen in privacy or monitor the au- can lead to permanent hearing loss. dio source inputs so you can locate an exact passage or section before mix- To protect your hearing when you use ing it, plug a pair of stereo head- headphones, always follow these 1 phones (not supplied) with a /4-inch guidelines to set the listening
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32-3009.fm Page 10 Tuesday, August 10, 1999 8:31 AM OPERATION 1. Set the volume levels on the out- PRESETTING THE INPUT put devices (receiver/amplifier and SIGNAL LEVELS tape deck) to minimum and turn them on. To avoid accidentally overdriving a channel or prematurely mixing in an 2. Press POWER to turn on the mix- audio input source, make sure you er. The red power indicator lights. start with the following settings: • Volume slide controls set to 0 illustration of POWER button w/indicator
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32-3009.fm Page 11 Tuesday, August 10, 1999 8:31 AM Rotate MASTER clockwise and tempo- Presetting the Microphone rarily set it to about the 5th marker. 1. If your microphone has an ON/ OFF control, set it to ON. 2. Set OFF/ON/TALKOVER to ON. illustration illustration Note: The MASTER volume control adjusts the overall volume of DJ MIC, CH1, CH2, and CH3. The mixer uses two volume unit (VU) meters to indicate the total stereo out- put signal level. For the best results, 3. While continuously t
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32-3009.fm Page 12 Tuesday, August 10, 1999 8:31 AM 1. To preset the PHONO 1 input If you did not connect an input source source, set PHONO 1/LINE 1 to to every jack or do not want to mix ev- PHONO 1. ery input source connected to the mix- er’s input jacks, you do not need to follow all the steps in this section. Af- illustration of ter you decide which source(s) you PHONO 1/LINE 1 set want to preset and mix, use this table to PHONO 1 to determine which steps to follow. To Preset See Steps Ch
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32-3009.fm Page 13 Tuesday, August 10, 1999 8:31 AM 4. Stop playback of the selected in- Important: Write down or remem- put source. ber the CH 2 volume level slide control’s setting for the selected 5. To preset the LINE 1 input source, audio source, so each time you set PHONO 1/LINE 1 to LINE 1. want to mix that source you can Then repeat Steps 2–4. slide the CH 2 volume level slide Note: If you have to readjust MAS- control to the correct setting. TER when performing Step 3, re- Note: If i
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32-3009.fm Page 14 Tuesday, August 10, 1999 8:31 AM 16. To prevent prematurely mixing au- 13. Slowly slide up the CH 3 volume dio sources, set all volume level level slide control until you get a slide controls to 0. reading of up to 0 on both VU meters. Checking the Sound 1. Select one of the input sources, illustration of CH 3 control then start playback of the selected source. 2. Set the volume level slide control to the position you determined during presetting. The VU meters Write down o
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32-3009.fm Page 15 Tuesday, August 10, 1999 8:31 AM 2. Set the input source selector to MIXING THE INPUTS the preset input source you want to play first through your sound You can connect input signals from up system. to six audio sources, select any two, then mix them so only one or both play through your sound system. illustration Mixing requires three operations: • Playing one input source • Monitoring the next input source • Switching to the next input source 3. Make sure the first input
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32-3009.fm Page 16 Tuesday, August 10, 1999 8:31 AM tem, slide CROSS FADER from A 3. Press CUE ASSIGN for the second to B. input source. illustration of CUE illustration of CROSS ASSIGN with arrow to FADER w/arrow CH 2 from A to B 4. Set the input source selector to CROSS FADER Slide : the input source you want to mon- left itor. • To the to fade in the channel ASSIGN A selected by and fade AS- out the channel selected by SIGN B . illustration right • To the to fade in the chan- ASSIGN B
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32-3009.fm Page 17 Tuesday, August 10, 1999 8:31 AM • Do not slide CROSS FADER to the USING TALKOVER center if you want to monitor one channel while the other is playing. Otherwise, the sound from the channel you monitor will also be illustration of switch heard through your sound system. set to TALKOVER Instead, slide CROSS FADER to the channel you are not monitor- ing. For example, to monitor chan- nel 1 (selected by ASSIGN A) while channel 2 (selected by AS- SIGN B) is playing, slide CROSS
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32-3009.fm Page 18 Tuesday, August 10, 1999 8:31 AM USING THE TONE CONTROLS Your mixer has one set of tone con- trols for the microphone and another set for channels 1, 2, and 3. You can tailor the high and low frequency sounds for the microphone and tailor the high, low, and mid frequency sounds for channels 1, 2, and 3. illustration of mixer front w/arrows to the control locations BASS MID For normal sound, leave , , TREBLE MIC BASS MIC and (or and TREBLE 0 for the microphone) set to .
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32-3009.fm Page 19 Tuesday, August 10, 1999 8:31 AM TROUBLESHOOTING With proper care and handling, your mixer should give you years of trouble-free service. However, if your SSM-1250 is not working properly, follow these sugges- tions to see if you can eliminate the problem. If you cannot, take the mixer to your local RadioShack store for assistance. Problem Possible Solution Nothing works Check the AC power connection and make sure the AC outlet is “live.” Check all the connections to the
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32-3009.fm Page 20 Tuesday, August 10, 1999 8:31 AM CARE AND MAINTENANCE Your Optimus SSM-1250 3-Channel Stereo Audio Mixer is an example of superior design and craftsmanship. The following suggestions will help you care for your 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 shorte
