Syntony speakers imput voltage?

robkath1964

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Jan 24, 2010
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Can anyone tell me what voltage the DC imput should be for Syntony MS 405 Multi Media Speakers. I got a set from a garage sale and although it shows DC imput it doesn't say how many volts. I tried 9 with no success so either they don't work or it's the wrong voltage
 

robkath1964

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Jan 24, 2010
2
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18,510



That was my first thought to, but i can't find a web site for them.