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Optimus SSM-1250 - page 1
Cat. No. 32-3009 OWNER’S MANUAL Please read before using this equipme nt. SSM-1250 3-Channel Stereo Audio Mixer 32-3 00 9.fm Page 1 Tu e sd ay, A ugus t 10, 19 99 8:3 1 AM ...
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Optimus SSM-1250 - page 2
2 This symbol is intended to alert you to the presenc e of uninsul ated dan- gerous voltage within the mixer’s enclosure that m ight be of sufficient magnitude to c onstitute a risk of ele ctric shock. Do not o pen the mixer’s case. This symbol is intended to inform you that important operating and main- tenance instructions are i ncluded in t ...
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Optimus SSM-1250 - page 3
3 CONTENTS Fe atures ..... ..... ..... .... ..... ..... ..... .... ... .... ........ .... ..... ..... .... ..... ..... ....... ..... ..... .... ..... ..... 4 Prep arati o n ..... ..... .. ..... ....... ..... .... ..... ..... ..... .... ....... ..... ..... ..... .... ..... ..... ....... ..... .... ... 6 Connecting the Out puts ...................... ...
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Optimus SSM-1250 - page 4
4 FEATURES Your Optim us SSM-1250 3 - Ch annel Stereo Audio Mixer is a sop histicated control center, perfect for m ixing soun d from mult iple audio sources on three sepa rate channels such as m icrophon es, tuners, CD pl ayers, turntables, or the audio out- puts from V CRs. The mixer i s r uggedly c onstructe d for hom e or professional use. Its ...
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Optimus SSM-1250 - page 5
5 11 Mo no /Ste re o S ele ctor — le ts you set t he output to st ereo or monaural. 12 Bass/Middl e/Treble Controls — let you adju st the tone of th e se- lected output to get just the right sound. 13 Cue Assign Controls — let s you select the chann el wh ere the d e- sired audio input so urce is located so you can monitor a nd prepare it bef ...
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Optimus SSM-1250 - page 6
6 PREPARA TION Warnin g : A s udd en high out put from the mixer could dam age your hea r i ng, especially if you use headp hones, and might also d ama ge the au dio d evices connected t o the mixe r’s output . Be- for e u si n g th e mi xer , m ake sur e yo u set your recei ver/ampli fier’s vo lume con trol to it s min imum vo lu me lev el set ...
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Optimus SSM-1250 - page 7
7 1. Connect the lin e-level outputs from u p to four audio sources (such as a CD player, tape deck, tuner, camc order, or VCR) t o the LINE 1 , LINE 2 , LINE 3 , a n d LINE 4 input jacks (m atching left to left, rig ht to righ t). Cautio n: Do not connect an audio source with a line-level output to th e low- leve l PHONO 1 or PHONO 2 input jacks. ...
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Optimus SSM-1250 - page 8
8 3. Connect a m icrophon e (not sup- plied) to the m ixer . • If the microphone has an XLR plug, conn ect it to MIC on the top left corner of the front panel. • If the microphone has a 1 / 4 -inch plug, con nect it to MIC on the low- er right corne r of the back pan el. Note: We recom mend you do not connect an X LR and a 1 / 4 -inch plug micr ...
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Optimus SSM-1250 - page 9
9 CONNECTING HEADPHONES To listen in pri vacy or monitor the au- dio sour ce inputs s o you can locate an exact passage or section before mix- ing it, plug a pair o f stereo hea d- phones (not supplied) wi th a 1 / 4 -inch plug into t he PHONES jack on the mix- er’s ri ght front panel. Your local Rad ioShack s t o r e carries a wide selection of ...
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Optimus SSM-1250 - page 10
10 OPE R ATION 1. Set th e vol ume l evels on the out - put devices (receiver/ampl ifier and tape deck) to m inimum and turn them on. 2. Press POWER to turn on the mix- er . The red power indicator lights. 3. T urn on the input s ources you want to mix. 4. Using the mixer requ ires two ba sic operations: • Prese tting the in put s ignal l ev- els ...
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Optimus SSM-1250 - page 11
11 Rotate M ASTER clo ckwi se and t emp o- rarily s e t it to about the 5th marker. Note: The MASTER volu me control adjusts t he overall volu me of DJ M IC , CH1 , CH2 , and CH3 . The m ixer uses two volume u nit (VU) meters to in dicate t he total s tereo out - put signal level. For the b est results, each input signal l evel should n ormal- ly b ...
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Optimus SSM-1250 - page 12
12 If you did not connect an input source to every jack or do not want to m ix ev- ery input source c on nected t o the m ix- er’s input jacks, you do n ot need to follow all the steps in this se ction. Af- ter you decide which sourc e(s) you want to pres et and m ix, use t his table to determine which steps to foll o w. Notes: • Whi le y ou ad ...
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Optimus SSM-1250 - page 13
13 4. Stop playback of the selected i n- put source. 5. T o pre set the LINE 1 i np ut source, set PHONO 1 / LINE 1 to LI NE 1. Then repeat Steps 2–4. Note: If you have to readjust MAS- TER when performing Step 3, re- membe r that this af fects the level of the previously pre set in put sources. Y ou must readjust t ho se sources unt il you g et ...
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Optimus SSM-1250 - page 14
14 13. S lowly slide up the CH 3 volume level slide control unt il you get a reading of up to 0 on both VU me ters . Im p ortant: Wri te do wn or rem em - ber the CH 3 volume level sli de control’s setting for the selec ted audio sourc e, so eac h time y ou want to mix that source you can slide the CH 3 volu me lev el slid e cont rol to the corre ...
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Optimus SSM-1250 - page 15
15 MIXING THE I NPUTS You can connec t i nput sign als fr om up to s ix audio sources, select any two, then mix them so only one or both play t hrou gh your sound syst em. Mixing requires three operations: • Playing one i npu t source • M onitoring the ne xt input s ource • S witching to the next input sou rce You can play either of the two s ...
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Optimus SSM-1250 - page 16
16 3. Press CUE ASSIGN f or the s econd input source. 4. Set the input source selector to the input source you want to mo n- itor . 5. Start playba ck of the in put source you want to play next through your sound system . 6. I f necess a ry: • Adjust CUE LEVEL to a com fort- able li stening l evel. • Adjust the seco nd input source volume slide ...
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Optimus SSM-1250 - page 17
17 • Do not sl ide CROSS F ADER to the center if you w ant to monitor one channel while the other is playing. Otherwise, the soun d from the channel you monitor w ill also be heard throug h your sound system. Instead, slid e CROSS F ADER to the channel you are not monitor- ing. For example , to monitor chan- nel 1 ( sel ected by ASSIGN A ) while ...
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Optimus SSM-1250 - page 18
18 USING THE T ONE CONTROL S Your mixer has one s et of tone con- trols for t he micr ophone a nd an oth er set for channe ls 1, 2, and 3. You can tailor the high and low frequency sounds for the microphon e an d t ailor the high, low, and mid frequency sounds for channels 1, 2, and 3. For normal s ound, leave BASS , MID , and TREBLE (or MIC BASS a ...
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Optimus SSM-1250 - page 19
19 T ROUBLES HOOTING With proper care and h andling, your mixer should giv e you years of trouble-free service. However, if your SSM- 1250 is not working properly, follow these sugges- tions to s ee if you ca n eliminate the probl em. If yo u cannot, ta k e the mixer to your local RadioShack store for a ssistance. Problem Possible Sol ution Nothing ...
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Optimus SSM-1250 - page 20
20 CARE AND MA INTENA NCE Your Optim us SSM-1250 3-Ch annel Stereo Audio Mixer is an e xample of superior design and craftsmanshi p. The f o llowing suggestions will help you c are f or your mixer so you c an enj oy it for years. Keep the mixer dry. If it gets wet, wipe i t dry immediately. Liquids might contain mineral s that can corrode the elect ...
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Optimus SSM-1250 - page 21
21 REPLACING THE FUSE The mixer uses a fuse for protection from power s urges and short circuits. If the mixer suddenly turns off and will not turn on, check the fuse. If neces- sary, rep lace the f u se with a 0.5-amp, 250-volt, fast-acting, 1 1 / 4 × 1 / 4 inc h fu se such as Ca t. No. 270 -1003 (no t sup- plie d) . Follow these steps to replace ...
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Optimus SSM-1250 - page 22
22 SPECIFICATIONS Input Sensitivity/Input Impedance DJ Mic (XLR jack) . .......... ....... ..... 1.5 mV /600 O hms, Bal anced/Unbala nced Mic 2 (P hone jack ) ...................... 1.5 mV /600 O hms, B alanc ed/Unbala nced PHONO 1 , PHONO 2 .. ..... .... ..... ..... .... ........ .... ..... ..... .... ..... ..... . 3 mV/5 0 kOh ms LINE 1 , LIN E 2 ...
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Optimus SSM-1250 - page 23
23 NOTES 32-3 009.fm Page 2 3 T ue s day, Au gust 10 , 1999 8:31 AM ...
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Optimus SSM-1250 - page 24
Ra di oSha ck A Divisi o n of T andy Corporation Fort Worth, T exa s 76102 6A7 Pr in ted i n Ch ina Lim it ed One-Y ear W arranty This pr oduct is warrant ed by Ra dioShack ag ainst manufac turing defec ts in mater ial and work man- ship und er norm al use for one (1 ) year from the date of pu rchas e from R adioSha ck com pany-o wned stores an d a ...
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