Kenwood vr-409 does not send subwoofer signal to subs

PDF]KRF-V8030D VR-409 - Kenwood

manual.kenwood.com/files/B60-4593-00.pdf

VR-409. INSTRUCTION MANUAL. KENWOOD CORPORATION. B60-4593-00 (EN) ...on the country and sales area. AUDIO VIDEO SURROUND RECEIVER ...

Kenwood VR-409 Manuals

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It sounds like the problem is not with your VR-606. If you hear a hum from the sub, the problem is more likely to be in the sub's built-in power amplifier. However, it is worth resetting the amplifier to factory presets. To do this, unplug the power cable from the mains supply and reconnect whilst holding down the power on/standby key. If the hum persists, connect any powered speaker to the sub-out socket, power on and listen for the hum. If no hum then suspect the powered sub amp. Turn the sub on with no connection to the Kenwood VR-606. If hum persists, the sub has a problem and will need to be replaced or repaired. By the way, you said there is a low frequency hum through the 'speakers' for about 30 mins. Is that all speakers or just the sub? Hope this helps.
Cheers, Don.

yes it very much has everything to with it. your sub out is at a pre-amp lvl, so you can route that signal to another amp, then to your passive sub, or get a powered sub

After making sure that your subwoofer is receiving power, as most models have their own amplifier, make sure that it actually is turning on. There is a possibility of a faulty power switch. Lets rule that out first.
Once the switch is on and the proper power connection is verified, turn your attention to the setup menu on your receiver. Navigate to the LFE/Sub output level. Adjust it up all the way. Then navigate to the crossover setting. Turn it up all the way. If the subwoofer also has it's own control panel including a crossover, turn that up all the way as well. Then with an input on the receiver that has a subwoofer output set up such as for DVD, play some audio. Or likewise you can also use the receivers' test tone capability that will pan each channel individually with a wide band pink noise signal that also includes a signal sent to the subwoofer output.

If this procedure does not produce results then send me a message including your subwoofer model and your observations of your systems' operation.

Is the 407 set up to drive the unknown sub. It's not just plug n play.

The manual will guide you, around page 15. Also refer to your subwoofer manual. Try retrevo.com for that one.

http://www.retrevo.com/support/Kenwood-VR-407-Receivers-manual/id/480ag200/t/2/

Yes. It needs to know you have a subwoofer or it won't send low frequencies out to one. Then you have to calibrate its level to match the rest of your speakers. Hit the SETUP section in the manual (available at retrevo.com).

Are you sure the VR309 is sending a signal out through the sub port? Attach one of your other speakers to it as a test (low volume). Then get back to us.

There are such things as user settings that affect this.

You don't say if you've configured the Receiver to know you have a subwoofer (under Multicontrol - SUBW YES). Unless it knows about the Sub it won't send anything out that single "preout". You can get an RCA splitter to run that single output to both inputs in the Sub.

Just as an experiment, temporarily run one a pair of cables from the REC OUT to the Sub's inputs and tune an FM station to prove the Sub amplifier is alive. If it's still silent, it's dead. If there is sound (muffled) you need to go back to the Receiver to figure out why the Sub Preout is signal-starved.

I'm having the same issue as pdoug: Sub rumbles in test mode, doesn't produce sound otherwise. Which makes me suspect it's the receiver itself -- the filter (or whatever) it is that should be separating the bass signal and sending it to the sub is not working. At least that's my guess.

Either way... this sucks.

"Sub-woofer output not working" problem, and notify you when a new solution is offered.
Press the setup key on the front of the receiver
Select the subw setting
Move the multicontrol knob until the sub woofer is on
Turn off the receiver and turn back on- the subwoofer should be on

The operator manual can be downloaded on the web site--- free

http://www.retrevo.com/support/Kenwood-VR-507-Receivers-manual/id/480ag219/t/2/