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Re: How to connect unpowered subwoofer to receiver with...
In order for this to work, you will need an external amplifier. Your receiver is set up to use a "powered" sub. With only speaker connections on the sub, it is a "passive" sub requiring a separate amp.
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The receiver's out put sections are grouped in pairs. Front left and right in one output, rear left and right in second output, and center channel and sub output on the third. Sounds like a semiconductor or semiconductors have gone bad in the center & sub output.
1) the JX-S900 needs to be a proper matrix switcher. It has to have the ability to route 1 input to more than one output.
2) the sub signals need to be low level RCA/phono, and not high level speaker wire connections. That's not just about the type of connector. It's about the signal going through those wires. A low level RCA/phono sub connection conducts a maximum 0.7 Volt. A speaker wire connection can transmit 30 Volts! If you put 30 Volts in to a line level switching device such as the JX0S900 you'll fry it.
Provided that the above two criteriia are both met, then yes it will work.
Connect the AV receiver's sub out to Source 1 - white RCA phono.
Connect the two subs mono LFE Left input (white RCA) or the single black RCA/phono inputs to the JVC's outputs 1 and 2 - white RCA/phono.
Set the source routing: input 1 goes to output 1 and 2
For powered sub :If your receiver has a sub woofer output on female RCA plug, that is the way to go. If no output you will have to get a speaker line to line output converter to then connect to your subwoofer amp input.
Unpowered sub - just hook up across the speaker terminals for each channel making sure that you hook it up in phase.
The input jacks on the subwoofer panel are for connection of satellite speakers to it's crossover. The outputs are for the crossed over signal input to your receiver or amplifier, as there will be no amplification or channel processing from the subwoofer connection. It's only an optional crossover that may have a sonic advantage over the crossover in your receiver.
What you also can do is connect the speakers directly to the 703 and set the crossover frequency on it.
usually subs have outputs 4 ur monitors however if ur sub is active @ ur monitors are passive then you need 2 connect sub 2 ur tape loop with rca connections,usually you use the send signal from ur reciever which would norm connect to ur tape input , if the sub is passive then u connect direct to speaker output on amp then monitors to the sat connections on sub
If your receiver has a dedicated subwoofer line level output, we recommend connecting your subwoofer to this jack. Most receivers will have just one (mono) subwoofer output, while quite a few subs require two inputs. You can use an RCA "Y" adapter cord , which is a cable with one female RCA jack at one end, and two male RCA plugs at the other. Some receivers require menu settings (such as "sub-on" or "front speakers-small") that must be made before the sub output will be active.
The one plug on the back of the receiver is an rca-type plug and is designed to be connected to a powered sub, which would also have an rca-type input. Even if you connected it, this output carries a line level signal and is not powerful enough to drive a speaker. If your sub has 2 connectors (same as a normal speaker) then you have an unpowered or passive subwoofer. You would either need a powered sub, or to use an external amplifier of some sort...then the sub output from your current receiver would go into the external amp...and the amp connected to the passive sub.
Hope this helps.
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.
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
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.
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.
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!