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Dropping resistor

I just bought a pr. of amplified speakers,{small} only 30 wattr rms.I am putting these on my bike which is 12dc. The power supply that comes with then is 120vac down to 9vac.I took 1 speaker apart and seen that their was a circute to change it to dc.When I put my meter on the + - It showed 12 vdc,hummm So I unsolder the wires and installed my own wires that would connect to my 12 vdc battary.When I connected the amp. the led light went out and the amp,.shut of. I figured that I blew it out. So I disconnected my wires and connected the wires back like it was.Pluged it into the wall and turned on the amp. and it worked.So i didn't blow it out. I figure that it's running on 9 vdc well I know DC. So all I need is a droping resitor to drop it to 9 vdc. The transformer is 120 vac-9vac 500ma. Thank you very much. John e me at snipped-for-privacy@yahoo.com

Reply to
conntaxman
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Full moon indeed.

Reply to
Homer J Simpson

hmmm Did you get the polarity right???

--
Dave M
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address)

Some days you're the dog, some days the hydrant.
Reply to
DaveM

Not here it isn't.

Reply to
ian field

What about on the posters' home planets?

Reply to
Homer J Simpson

Good point.

Reply to
ian field

If the OP connects it *before* the bridge rectifier,the polarity won't matter..just find another plug that fits,and wire it up.

Can your 12V supply on your bike supply 500ma+?

Reply to
PhattyMo

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