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Does the receiver, Have a (RCA) Jack on the back of the unit ,Where it is written sub out,If it does, You need what is called a sub conecter patch cord to hook up the sub.If it is a powered sub, If the receiver does not have a sub jack you can not hook up a sub to it.
Depending on the model, there are two ways to connect a subwoofer to an amplifier, receiver or processor. The best way is to connect the subwoofer to the SUB OUT or LFE output of a receiver, but some subwoofers can be connected to the speaker level outputs of the receiver or amplifier.
1. How to Connect a Subwoofer to the Subwoofer Output
The preferred method of connecting a subwoofer is through the LFE or Subwoofer output (SUB OUT) of a receiver. Almost all home theater receivers (or processors) and some stereo receivers have a subwoofer output. The LFE (Low Frequency Effects) is a special output for subwoofers and is often labeled 'SUBWOOFER' not LFE. 5.1 channel programs on DVD discs have a dedicated .1 channel output with bass-only content that is best reproduced by a subwoofer. Connect the output of the LFE or Subwoofer jack to the Line In jacks of the subwoofer using a single RCA cable (the two jacks on the left in the photo). A 'Y-Cable' may be necessary to connect the LFE output to both the left and right channels of the subwoofer.
2. How to Connect a Subwoofer to Speaker Level Outputs Some receivers and amplifiers do not have an LFE or Subwoofer output. In this case you can use the speaker outputs of the receiver to connect the subwoofer. Using speaker wire, connect the left and right channel speaker outputs of the receiver to the left and right channel speaker level inputs on the subwoofer (the speaker inputs on the right side of the photo). Using speaker wire, connect the left and right channel speaker outputs on the back of the subwoofer to the left and right channel front speakers.
As I implied earlier, take a clue from the physical style of connectors for both parts of the subwoofer function in the old and new receivers:
RCA connections are for Line Level signal between components only.
The input (bare wire) at the speaker is for AMPLIFIED signal.
You can't just modify one to fit the other and expect magic to happen. Be glad you didn't do it the other way around and modify an amplified (speaker level) outout into a Line Level input. You likely would have smoked that component.
Your subwoofer is a passive speaker, that is, like any other speaker it needs an amplifier. Many subs are self-powered (amp built-in) and they would mate well with the RCA sub output of the receiver.
Get yourself an Active (self-amplified) Subwoofer and run UN-MODIFIED RCA cables to it, according to its instructions, from the Sub Out of the receiver. Or get an amplifier between your receiver and the sub you have.
Without knowing more about the subwoofer (powered, passive, what kind(s) of input it takes, I have to take a wild guess. Most powered subwoofers use the old standard RCA cable. I there are two jacks on the sub for Left and Right input you just get an adapter to make the cable plug into two jacks.
deppending on the subwoofer, theres all kinds of converters, u can do this, take the subwoofer to a radioshack or call them and ask that u need a wire converter 4 example say rca converted into headphones & they will hook you up, saves alot of money 4 a say 15 to 20 doller item, and ur subwoofer will be blasting like no tomorrow
hope tha helps
Usually, a subwoofer will have its own built-in power amplifier. Thus, it will be designed to plug into a standard RCA jack (the type used for DVD players, etc). rather than having wires to connect to a speaker terminal block. Look for a jack on the back of the receiver called "Subwoofer", or simply "SW". If your subwoofer has 2 single wires, it WON'T work with your reveiver's subwoofer output, as this output only carries a line-level signal and is not amplified. You would need a separate power amplifier for this type of SW. If your SW speaker has a DVD-type plug, it should work fine with the receiver's SW output jack.
MAKE SURE THE RCA JACKS ARE RUNNING FROM "AUDIO OUT" OF TV TO "AUDIO IN" ON VIDEO 1 ON RECEIVER, THEN YOU SHOULD HAVE SOUND...(IF THIS IS BACKWORDS YOU WON'T HAVE SOUND.) THAT'S HOW OURS IS HOOKED UP AND WORKS PERFECT.
You could do a couple things if your head unit has all three outputs, then take them and hook them into the inputs. If you have just the front and the rear outputs, hook those to the inputs front and rear. Then hook the output of the 4 channel to the input of the mono block. I hope this helped -Andrew Hawkins