What dc voltage do I connect to speakers - Juster AC-691 Computer Speakers

If it is the transformer, it should be a DC output. Look where it connects, it will tell you what voltage you need. Use a volt meter to see if you are getting that from your "transformer". If so the amp in the speaker is probably blown, if not you need a new DC power supply with the correct voltage. If the replacement ma is higher that will not hurt, The information should also be on the "transformer".

Sounds like DC leakage....pre-drive and/or output transistors (or IC) becoming intermittent often pass DC voltages to the speakers. The "pops" you hear are these DC pulses being passed to the speakers and the "cutout" is the protection circuitry doing its job...protecting the speakers. Speakers want AC voltages...plus voltages moving the cone in one direction, and a negative voltage moving it in the opposite direction. DC voltages push the speaker cones in a single direction and hold it there until it fails. The bad news...it's repair shop time.

first off need to know specs what voltage it uses ac or dc
amp draw and volts should be market on speakers then you need to no if dc volts what part is negative and positive on terminal connection send model #

dc will not power ac, soorry

C cells are 1.5 volts each. If the speakers use three of them that means you'll need a 4.5 volt supply. If each speaker needs batteries, you'll need to feed that voltage to each speaker, and the supply should have enough current for the total load. A 1-amp rating is probably fine.

Computers always use DC voltage. Computer speakers receive DC voltage from the computer.
DC voltage has a Positive and Negative polarity.

In the power jack of the speaker, the Center pin is the Positive connection. The outer shell is the Negative connection.

Center hole of the DC adapter plug - Positive.
Outer shell of the DC adapter plug - Negative

Voltage 5 Volts DC.

In case you need it,

http://support.dell.com/support/edocs/dta/acs5/

Sounds like you have a bad amp IC or transistors.
When these go bad they almost always put roughly 40 volts dc from the amp power supply to the speaker terminals. The protection circuit senses this dangerous (to your speakers) dc voltage and disconnects the speaker terminals from the amp via internal relays (the ones you hear click) and puts it into protect mode. If it didn't the dc voltage would quickly toast the voice coils of the connected speaker.

I believe that is the wrong VOLTAGE !!!

The PSR takes a 12 volt, 1 amp or more DC power supply with positive on the pin.

If you have connected 24 volts either AC or DC of either polarity you have likely caused internal damage. Try a 12 volt DC supply and if it doesn't work, it needs to go to a repair facility.

ALWAYS check the voltage and the polarity on ANY of the devices using the power adapters BEFORE connecting the adapter..

Any PC speakers that have a AC plug pak attached can probably use 12V simply cut off the AC plug packs lead that goes to the speakers, and connect up 12V ya should be good to go.. some connect with a Phono Plug, and usually the Outer is Minus Voltage and the Centre is Plus Voltage .. they are also generally Diode protected so a reversal shouldn't cause too many probs... GL

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