Question about Kenwood 107VR

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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

Posted by Kit Scott on

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  • bjmcloud Mar 09, 2008

    Exactly the same problem as the previous person. Where would I check to see if the sub option was on?

  • Joe Daniels
    Joe Daniels Oct 26, 2013

    I just bought a kdc 255u and no sub woofer seting on the menu. I guess I'll just take the thing back to the store. Not my first stero. Hear good things about Kenwood, but I'm gooing back to pioneer I guess

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

Posted on Jan 31, 2006

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LFE or Subwoofer
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The normal connection on the subwoofer is for connecting a full range signal, from which the sub extracts bass via its internal crossover.
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How do i make the Sharper Image SA251 Subwoofer Speaker work what do i use as a line level?
I don't suppose they came with a manual.

http://www.spreadmyad.com/san-diego/merchandise/electronics/8242133-sharper-image-subwoofer-san-diego-25

Line level would (usually) be the LFE signal produced by a multichannel receiver. The speaker level inputs would be from the Front L and R speaker outputs.


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Aug 04, 2011 • Sharper Image SA251 Subwoofer
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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.

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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..
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Apr 20, 2011 • Denon Audio Players & Recorders
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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.
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http://www.retrevo.com/support/Panasonic-SC-PT950-Home-Theater-Systems-manual/id/2869dj183/t/2/

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Read the manual where it doesn't say to convert a speaker wire to RCA.
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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...
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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.

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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.
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Dec 08, 2010 • Denon AVR-587
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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,
BB
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