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Connecting subwoofer to receiver.

My receiver has a "Subwoofer pre-out" out. My subwoofer has three possible inputs under "Line Level In." 1. is LFE and the speaker manual says if receiver has LFE or subwoofer out to connect here. 2. and 3. are L and R as in RCA cables. With the cable supplied by the speaker manufacturer, I can't get anything out of the subwoofer using the receiver's Subwoofer pre-out output. If I connect straight from the DVD player to the sub it works fine, but not through the receiver. Why not? Am I doing something wrong? Using a THX optimizer on "The Incredibles" DVD all of my other surround sound speakers work as they should, just not the sub (unless I've hooked it up straight from the DVD player). Thanks for any help

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Re: Connecting subwoofer to receiver.

Have u checked that the sub option on the reciver is on?

Posted on Jan 31, 2006

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LFE or Subwoofer

Connect the Subwoofer connection on the receiver to the LFE connection on the subwoofer.

The normal connection on the subwoofer is for connecting a full range signal, from which the sub extracts bass via its internal crossover.

Dec 05, 2013 | Audio & Video Receivers

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Conncet a sony sub to a denon reciver

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.

Hope it helped..

Apr 20, 2011 | Denon Audio & Video Receivers

2 Answers

I have a Boston Acoustics VR-500 Subwoofer with a problem. As soon as anything is plugged into the line level RCA jacks, the subwoofer produces a loud buzz/hum. I have tried connecting it to the subwoofer...

I'm thinking you have an open shield ground on the RCA input side. Connecting speaker inputs possibly restores the ground. Try connecting the high level inputs then disconnect the remote end of the cables (floating the grounds).

Then get out an ohmmeter and find that open circuitor or bad solder joint between RCA ground and real ground in the speaker's amplifier. Or.... if speaker ground kills the hum and you want to use RCA Line Level input to the sub, just connect one minus speaker output on your source amp to one minus on the sub's amp.

Mar 01, 2011 | Audio & Video Receivers

1 Answer

I have a velodyne VA 806 subwoofer which I would like to connect to my AV receiver Denon AVR 391. In my receiver, I have a subwoofer out female connector (one) and where do I connect this line to the...

Get an RCA Y-adapter to feed both INputs on the sub. Define the sub in the Denon and set your other speaker settings as required to redirect the bass/LFE if they can't handle it.

Dec 23, 2010 | Audio & Video Receivers

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Is it possible to hook up a powered subwoofer to this unit? It has a centre pre-out, but nothing labelled for a sub, and the manual is useless. This is a very nice old receiver, works perfectly, and I'm...

I own 2 of these Pioneer VSX-D903S units.

The only way to hook a powered subwoofer up to a VSXD903S 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]

(To the guy [dunnbiker] that says there's no rear channels: You're wrong.) The VSX-D903S has 2 stereo (A/B) channels, dual center channel (place center speakers to the left and right, or above and below the screen), and two rear satellite channels. It is a 3-Ch Logic/Dolby Pro-Logic Surround equipped receiver, not a DolbyDigital/DTS multichannel x.1 surround unit.

Dec 19, 2010 | Pioneer VSX-D903S Receiver

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No output to the subwoofer using the sub pre out RCA jack.

I'm assuming your subwoofer is self-amplified, otherwise it won't work with a preamp (rca) input.

Under Speaker Setup you have to have Subwoofer set to YES (page 16).

If you have good bass-capable main speakers I would recommend setting the subwoofer playback mode to LFE+Main, otherwise just LFE.

Beyond this we would need to know something more about the subwoofer and its controls.

Connect any other preamp out channel, like CDR/Tape OUT, to the sub and tune an FM station to see if the sub is capable of processing audio. A 'normal' audio signal would sound muffled but it would prove the cabling, amp and speaker at least function and point us back to setup as the culprit.

Dec 08, 2010 | Denon AVR-587

2 Answers

Which jacks to wire the subwoofer to?

Your receiver should have an RCA connector on the back panel that will be marked "sub woofer" or "LFE out". That connects to your sub woofer with a standard RCA type cable. Also, some powered subs have left and right speaker level inputs and outputs in which you would indeed run the sub woofer through the speaker outputs. The down side of that type of connection is that the line level converter inside the sub woofer will take a slight amount of your receiver's output power, although that is rarely detectable. Also, if you have a Dolby Digital receiver, using this connection method will take away systems ability to accurately control the low frequency effects of a soundtrack.

Good Luck,

May 16, 2009 | Kenwood Audio & Video Receivers

2 Answers

No Soound on Subwoofer from Yamaha RX-V363

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!

Mar 31, 2009 | Yamaha RX-V363 Receiver

2 Answers

Very low ouput from subwoofer preout

The problem was that some subwoofers (inluding my velodyne model) cannot process the LFE signals through the line level inputs on its amps, so the other way to run your subwoofer is to run the front left and right speaker outputs from your receiver to the speaker-level inputs on your sub, and then plug your front and left speakers into the soeaker level outputs on the sub. you have to set the onkyo receiver to "Subwoofer: No". that way the LFE signals are sent through the front speaker channels and you will get the same BASS output as if using the line-level input. O So yes it does require a bit more speaker cable, but it works fine now.

Mar 18, 2008 | Onkyo TX-SR304 Receiver

1 Answer

No signal on subwoofer out in Onkyo TX-SR703(E) - similar to TX-SR803

Hey Tad, I have the same problem and perhaps a solution. I just moved to the other SW "pre-out" and it seems to be working..the green light is on . Whatever works i guess.

Jan 24, 2008 | Onkyo TX-SR703 Receiver

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