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How/ where do I connect an UNPOWERED subwoofer to the AV receiver? I have an old Pioneer sub and I'm not using any other amplification in conjunction with the SR803.
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You need a RCA sub-woofer cable (analog mono) to connect between the receiver's sub-woofer Pre Out and the sub-woofer. This cable has a single RCA plug at each end of the cable. The cable is somewhat thicker than some audio RCA cables. You can use any RCA cable temporarily.
You simply connect a RCA type line cable from the subs line input to the dedicated socket on the back of the Onkyo.
When you run speaker set up it will set the subwoofer up.
Get a RCA cable and connect from your amp where it said Sub Woofer in the Pre Out box in the back of the amplifier top left hand side and take it to the "Sub In" located in the back of your Sub woofer bottom right hand (White round connector).
Good Luck!
The only way to hook a powered subwoofer up to a VSX-D903S is if your subwoofer is equipped with amplified/speaker level terminals on the back, in addition to the line-level input. If you only have a line-level input, do not attempt to hook it up to this receiver.
If you're lucky, and have speaker-level inputs on your powered subwoofer, you would use the amplified terminals (connect to B-channel on the receiver). DO NOT connect anything to the line-level connection.
Alternatively, you could build two unpowered subwoofers, then set the receiver's Impedance switch to LOW, then connect one enclosure to each of the "B-channel" outputs. Connect your regular left and right speakers to their corresponding "A-channel" outputs. [Impedance range: 4 Ohm minimum, 16 Ohm Maximum]
It sounds like you're doing everything right. Did you define the sub to the Onkyo (Subwoofer = Yes, page 22)?
Let's prove the sub works. Set its volume about half-way, cutoff= 170Hz. Temporarily connect an RCA cable from its Line Input to one of the Tape Out connectors on the Onkyo and play some FM through it. If it's alive you'll hear the low end of the music.
Don't buy into the hype that there are different pedigrees of RCA (or speaker) cables that will make an audible difference. Save your money.
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.
I contacted the dealers where I bought the amp and they suggested that I connect speaker cable to both the left and right front speakers and use that to connect the subwoofer.
However, whilst this has worked (sort of) it is evident that to achieve the best results, I will need to replace my existing sub with a powered one in the near future.
Only a temporary fix I'm afraid, but it got the job done.
Talked to tech support at Onkyo and there seems to be two (2) places you can hook your sub up to. I placed mine in the wrong slot. So please double check where you placed the sub connection.
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