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Connecting Ac power adapter to a subwoofer?

post #1 of 5
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I have some experience with this type of ghetto rigging. I did not want to test this out on my own because it is dangerous so I want a second opinion. I connected a subwoofer to my creative T20w 2.0 setup. I just connect the subwoofer to the left speaker. I can notice a difference, it brings out the lows that the t20w cant produce. Any ways I have a couple of AC power adapters laying around.

The biggest one i have
input:AC 1200v 60hz 160mA
output: AC 12v 1.2A

The smallest one i have is a cell phone charger.
I do not think i have enough power to burn my subwoofer out, but will connecting a power source like this burn it out?

Hear is the diagram. Do you think it will boost volume? I have a couple of knobs and some circuits that i could possibly connect for volume control.

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post #2 of 5
I don't understand what your trying to do. Your trying to supply more power to the sub itself, not the amp right?
post #3 of 5
I think i know what you are talking about. But you need to include more info. Im assuming you have a non powered sub connected to the left side of a powered system. Witch makes no sense at all. As you would be reducing the power to your left speaker to power the sub witch would half to have a crossover built in. So if im reading your (horrible) paint drawing you want to hook a AC Adapter into your speaker line in series to give the sub more power. (By the way the adapter is putting out DC at 12v not AC and the input would be AC 120) Now that will not work. A speaker works by pulsing singles to an electromagnet (Voice Coil) the coil is surrounded by a permanent magnet that repels the coil as it changes its magnetic field. Now the AC adapter would put out 12v of constant DC current so the voice coil would move out/in and stop
instead of alternating at the correct frequencies. Now you probably wont have enough power to damage it (In my physics class we abused some speakers got them up to 20v before the coil blew.) but you could damage the amp or the crossover.

Im still not sure if this is what you were thinking but based on what you posted i think this is a correct assumption.
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post #4 of 5
Sounds crazy to me as well

Sent from my Droid Incredible using Tapatalk.
post #5 of 5
Boost what volume? Did you connect it to series or parallel? To boost the volume by 3db you will need double the power your able to put out now. Whats the rating of the sub? Dont you have a home theatre or a cheap amp lying around?
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