How to connect unpowered subwoofer to receiver with RCA sub out?

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.

you need another reciever/amp to power that sub, because that denon reciever is designed for a powered sub,. if you have another old reciever/amp laying around, you can connect the sub out from the denon into an auxillary input of any old reciever/amp, (switched to that input) with speaker wires from old reciever/amp to the passive sub

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

I have the same setup. Are you going out of the subwoofer output of the reciever? (it's purple.) then into the LFE jack of the subwoofer (also purple.) That's the only connection you need besides power. If you have those right, try using your cable for something else to make sure the cable is good. Is the indicator of the subwoofer green? Mine comes on with the reciever. Good luck!

Subwoofer needs to be enabled through menu on Yamaha. LINE OUT might be turned off or Subwoofer volume set to low or off... (-db level) kinda thing...speaker wires are usually always live etc...

Greg- Powered subs are better than non-powered subs (also known as passive subs), anyway I see the TX-8511 has no sub pre-out on the back panel, so you need to decide what sub you will use and run from the receivers left and right speakers output into a subwoofers speaker in from speakers then back out to speakers, look at the back of a subwoofer and you will see like 4 sets of speaker hookups 2 in and 2 out, what this does is takes the low end or bass and drops the signal to the subwoofer then takes the mids and highs out to your left and right speakers, unless your regular left and right stereo speakers have large woofers a sub is the way to go.

HI,run speaker cables from "b" speakers out put to speaker in puts on the sub and switch "b" speakers on on the amp.

hope this helps.
CABLE GUY.

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.

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!