AVR 810 Denon Receiver Sub Woofer Hookup?

Is this a new problem, as in it worked before? If it's a new hookup, it's possible the sub you have isn't powered. In which case, it won't work. PRE out is 'preamp' for powered subs.

check that wire and fuse again and try to reset and try

IAW the manual...

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Denon-AVR-791-Receivers-manual/id/23693ag505/t/2/

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Hi,
Your sub-woofer apparently does not have an amplifier built into it. This type requires you to use your front left and front right speaker output to got through it to your regular speakers. It is called a passive sub-woofer for that reason.
To set it up, Connect your front speakers to the "output" of the sub. It should say "to speakers" on it.
Then connect the Speaker Outputs for the left front and right front on your Denon AVR-391 directly to the Sub. It should say on the back of the Sub "to amplifier".
Here is some theory you should know, if you don't already know it, that will help you get a satisfactory result in setting up this system.
There is a condition on setting up all speakers and subs that not everyone know. It's call "phase alignment". Phase alignment (A Good Thing) refers to all of the speakers in a system moving in the same direction (in and out) at the same instant in time. This gives you much clearer sound and better response from your sub-woofer.
Phase Cancellation (a bad thing) is when some of the speakers are moving out and other moving in during the very same instant in time. It causes problems in sound.
IN A SUB-WOOFER, IT CAN CANCEL OUT THE LOW NOTES.
Here is how to handle it:
On the back of the receiver the speaker terminal outputs are colored Red and Black. Black is considered negative and Red is considered positive. On the back of the Sub woofer and on the speakers the same colors apply. MAKE SURE THAT ALL OF THE CONNECTIONS GO BLACK TO BLACK AND RED TO RED WHEN CONNECTING UP THE SPEAKER WIRES.
The system will work either way. But you will have severe bass loss if the woofer wiring is out of phase because of phase cancellation.
Hope this helps,
Best Regards,
Mark


"Phase Cancellation"

What model is the sub? Is your Klipsch sub powered? If it's already plugged in and powered on make sure you have the RCA cable going to the correct LFE output on the Denon and have it set to 5.1.

In the setup menu on your denon receiver make sure the subwoofer setting is set to ON or YES.

set the front speaker to small or if still set in large,set the subwoofer setting to lfe+main.

you caan either buy a SPLITTER OR JUST RUN A SINGLE LINE OUT OF THE RECIEVER INTO THE SUB. BOTH DONT NEED TO BE PLUGGED IN. SUBS ARE MONO NOT STEREO. THERS NOD IFFERENCE IN SOUND

Hi....

A passive bass is a box with a sub-woofer in it.
An active bass is a box like that with an amplifier built in.

Hope that helps.

Check the Denon site too

why don't you both return these units and call Denon for replacements without these problems?  Sqeaky hinges get the oil.