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What voltage required to power a sony subwoofer

Hi there,

I've just got an old sony sub which was going to be thrown out. There's one RCA input which appears to take line level, and also another cable, which I'm guessing is for power. It originally came with another hi-fi system, which obviously had the correct voltage output to power the sub. It's a very small white connection, on a thin 2 core cable. I'm guessing it probably only requires a low voltage to power it, but I don't know what voltage that would be, and if it would be AC or DC. I'm guessing DC?

Anyway, I can't find a free manual to download anywhere, so I thought I'd ask if anyone knows the power input required to run a sony ss-WG990 subwoofer.


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  • Northern Boy Jun 17, 2008

    I have the exact same problem!!



    Anyone help?

  • deadeloth Aug 12, 2008

    WTF!!! someones gota figure this out!!! try McGyverin togather a power supply from another sub. might work, might not. thats what im going to try but just be carefull

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Hey,

I just got one of these units, the SONY SS-WG990.
The RCA cable is direct conection to the speaker.
It requires external AMP.
The other cable is just for the system switch and LED.
If you just have this unit, all you need is an AMP to
feed it.

Posted on Sep 20, 2008

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Well all you need is original system, I got one. The voltage for the sub is about DC 15.5V-15.9V 100%. But theres another problem for me, the subwoofer is active or this only is for the led? I don't believe that you need 15V only for led, so I think it's active, it has internal AMP that uses that current.

Posted on Aug 24, 2009

  • bhingo Feb 10, 2012

    The 15 volts runs in a circuit that tells the main unit to switch on its internal subwoofer amp when the passive subwoofer is connected. If the 15v circuit is not complete then the main unit doesn't drive the subwoofer.

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I got an 8 inch sony ss-wg990 and i am powering it with a 50 watt amp put i am putting a bigger one on there but if you dont want the sub i will take it becuse i am puttin them on my computer and i need another one

Posted on Oct 26, 2008

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My electronic know-how is medium-low
(I have the Sony MHC-GX45 but not the subwoofer. I am trying to run another subwoofer from the MHC-GX45. But no success so far. I may need the remote control unit to switch on the subwoofer. Or the subwoofer's front LEDs circuit may need to send data to the MHC-GX45. If so I may need to connect a LED the "subwoofer control" at the back of the MHC-GX45.)

Here is my take on running the SS WG990.
Service manual downloaded from http://www.electronica-pt.com/images/fbfiles/files/HCD_GX45.pdf shows on pg 43 a significant "subwoofer" circuit board inside the Sony MHC-GX45/GX35/GX25/RG440S/RG330/RG310/RG220 CD/radio/cassette/amp unit. This may be the AMP for the subwoofer which would mean that the subwoofer is PASSIVE and that the control cable powers the LED on the front of the subwoofer. The way to check whether the subwoofer is PASSIVE is to unplug it and then open up the subwoofer box. If it is PASSIVE then there will be no amp inside the box. If it is ACTIVE then there will be a 100W RMS amp inside the subwoofer box. If PASSIVE (no amp inside subwoofer box) then the MHC-GX45 user manual states the WG990 has a nominal impedance of 6 ohms. An amp that can handle 4, 5 or 6 ohms should work fine. An 8 ohm amp might be damaged.

alepuel's comment above suggests that the subwoofer is passive. But check for yourself if you have doubts. And then post here to let everyone else know.
.

Posted on Jan 10, 2012

  • bhingo Feb 10, 2012

    I am now running an LG passive subwoofer off my MHC-GX45 unit. I put a 4 ohm resistor across the control cable connection prongs and the MHC-GX45 drive music through the sub. This means the SONY SS-WG990 is passive like alepuel says.

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Hi same prob! attaching it to my pc too!

Posted on Aug 12, 2009

  • bhingo Feb 10, 2012

    The nice lady at Sony is wrong. Or maybe she is trying to kill you. Do not put 120v into this subwoofer.

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I have this problem too! Please,help!

Posted on Jul 20, 2008

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The nice lady at siny said 120v ac 60hz but ya need bigger wires i would think

Posted on May 18, 2009

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