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Voltage on subwoofers input

My subwoofer Sony shows some voltage on inputs.When I touch input socket the voltage disapears.Subwoofer is working normaly.Now is the question - Can I conect subwoofer with receiver as I have fear that this voltage could damage parts in receiver??

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Is the subwoofer a self-powered unit? If yes, it would have a minimal voltage showing on a meter. If the input is a line input, it would not have a problem taking in a line output (not speaker - never!) from your receiver. If the only output you have from your reciever is a speaker out, then purchase an L-Pad type speaker to line matching transformer. You can also take one of the input channels coming from the source and Y out a side to the sub pre receiver, but you then you would need to be able to adjust levels on the subwoofer independently from the receiver.

Posted on Jul 24, 2009

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Posted on Jan 02, 2017

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What are the available subwoofers for sony mhc-gnz88d


you need 'line level input .. left and right'
front speaker to subwoofer input = subwoofer works + speaker outputs Use The ( Wharfedale SPC-8 Active Sub)

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How do I set up a Celestion S10 Subwoofer...


OK
Voltage is relevant to where you live in the world. America it's 110. Europe mostly 220.
What you're asking is a very deep and complicated question.
I'm attaching a link with some articles.
What I suggest is that you find an upper end audio store and ask a 20 audio head to set up your system for you. Subwoofer Setup and Calibration for Best Bass

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I have a s108sp subwoofer with a right and left input assuming this is for a cable going to one input on my Sony reciever. The subwoofer also has inputs for speakers. Do I plug the speaker wires into...


Hey there houleo!
If your subwoofer has a stereo input and stereo outputs, then it's a good idea to send the signal from your receiver to the sub, then out to the other speakers you have hooked up. Some subwoofers will take the low frequencies out of the signal to the left and right speakers, so that the sub handles it alone. This often gives a nice crisp sound.
Reciever/amplifier
l l l l V V Subwoofer l l l L------> Right speaker
V Left speaker
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THERE IS NO SIGNAL COMING FROM THE SUBWOOFER, IT IS CONNECTED TO A SONY AMPLIFIER IN THE SUBWOOFER JACK, AND CONNECTED TO THE SUBWOOFER IN THE LOW LEVEL INPUT. THE SUBWOOFER IS CONNECTED TO THE MAIN, AND...


With everything connected correctly there could be a couple of possible problems:

1. If your receiver has on screen display capabilities, you may need to turn the subwoofer output "on"
2. If your subwoofer has speaker wire inputs/outputs, you could run speaker wire to it, then to your speakers & test if the subwoofer is working... hence verifying that the receiver has a function to turn the subwoofer output on/off
3. The cable between the subwoofer & receiver could be bad. Try another cable.

Good luck!

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I have a celestion s80 active subwoofer, and when it is only plugged in to power, (no input) it lets out a soft whining sound that continues even after input is inserted. i have ruled out grounding issues,...


Dont remember which cap it is , but its 47 uf 35v, on one corner of the board. You can use a slightly bigger value and slightly higher voltage if thats all you can find. Check the two caps next to the voltage regulators, these go as well problem sorted!!!!

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What voltage required to power a sony subwoofer


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.

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Subwoofer Connection: Speaker wire to Mono RCA


The easiest solution to use your subwoofer is to buy an amp for it. Any old stereo receiver from a garage sale will probably do just fine.
  1. Connect the mono RCA subwoofer output from your Sony with a 1xRCA-to-2xRCA splitter to both the left and right input of the cheap reciever's tape or aux input
  2. connect both speaker outputs of the cheap reciever to the speaker input on your subwoofer. make sure both black (-) outputs on the reciever connect to the black input on the sub, and the red outputs (+) on the reciever are both connected to the red input on the subwoofer.
  3. make sure the cheap receiver's volume is all the way down. turn your Sony up to about the loudest you'll listen to it. turn up the subwoofer amp until it's loud enough to sound good.
  4. leave the subwoofer amp alone, the Sony volume will all you ever need to touch from now on.

You can even now turn off your subwoofer / adjust the volume easily now!

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Subwoofer


Most AV receivers do not have a built in amplifier block to drive a subwoofer, and merely provide the subwoofer output channel at line voltage. Thus, a powered subwoofer is required. Does the subwoofer require mains power? From your description, I'm guessing it doesn't. If not, it does not have a buit in amplifier, you will need to purchase a monoblock amplifier, which is just a mono amplifier with a volume control, no tone controls or anything else. Make sure that the amplifier power rating is as close as possible to the subwoofer power rating, as it is quite possible to blow a speaker by using an amplifier whose power output is too low, by overdriving the amplifier , and putting DC through the voice coil when the amplifier clips. If it does require mains power, it will have an amplifier built in, but does not have line level inputs.

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1 Answer

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This may or may not apply to your particular problem. On similar humming sound problems, I normally would look for either a fault in the input side and/or a leaky/defective capacitor in the power supply. On the input side, this may be a frayed shielded wire, loose connector (esp. the outer which is normally the ground). Try completely removing the connecting/input cable that goes into the subwoofer. If that doesn't work, then it you may want to check the big capacitor in the power supply section of the subwoofer. If you are not that familiar in working with power supplies, may I suggest that you ask any electronic technician to have a look at it since capacitors store a rather hefty voltage. Better be on the safe side. Hope this works out ok with you

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