How do I connect this subwoofer to my reciever

There is only one RCA input.
JVC SPPWA670 Subwoofer SPPWA670

You need a subwoofer with speaker level dual inputs.

Several possible answers. First - is that the Yamaha has a fault that is sending a signal with too much power on it. And the sub detects this and switches off.
Second - either the Receiver or Sub is switching off when no audio is present. A setting problem?
Third - the sub has a fault, possible overload, and goes to standby for safety.

you need another reciever/amp to power that sub, because that denon reciever is designed for a powered sub,. if you have another old reciever/amp laying around, you can connect the sub out from the denon into an auxillary input of any old reciever/amp, (switched to that input) with speaker wires from old reciever/amp to the passive sub

The input jacks on the subwoofer panel are for connection of satellite speakers to it's crossover. The outputs are for the crossed over signal input to your receiver or amplifier, as there will be no amplification or channel processing from the subwoofer connection. It's only an optional crossover that may have a sonic advantage over the crossover in your receiver.

What you also can do is connect the speakers directly to the 703 and set the crossover frequency on it.

You need to use the LINE LEVEL connection on the pv800 (usually a rca type connector cable) and run this cable into the back of the HK 520 Subwoofer PRE-OUT connector, be sure the HK Receiver menu speaker set-up option is set to SUBWOOFER "YES"

Iassume you mean you hear the buzz independently of the audio program - simply connecting the cable causes the buzz?

If tanything in the mix is powered from different AC sources you may have a different ground potential. Sometimes manipulating the orientation of one or more ac plugs will solve hum problems.

there will be a subwoofer pre out( needs to be amplified) or if it don't have subwoofer pre out you will have to send the audio out to a stereo reciever that has inputs for the optical ( digital audio signal )( to a stereo or surround system that has 5.1 or higher has full surround sound ) and of course L and R audio inputs and the subwoofer pre out , then the subwoofer pre out will have to be amplified by a reciever , subwoofer amp , surround sound , ect

have you checked for the continuity of the wirings? check for the resistance of your speaker from it jack..... it should measure close to 8ohms or 4ohms using a digital multimeter (DMM). check also the sub out jack of your reciever if there is a signal from it using your main speakers if they come with jacks also (turn the volume low to prevent damage to other speakers you connect on it!

The easiest solution to use your subwoofer is to buy an amp for it. Any old stereo receiver from a garage sale will probably do just fine.

1. Connect the mono RCA subwoofer output from your Sony with a 1xRCA-to-2xRCA splitter to both the left and right input of the cheap reciever's tape or aux input
   
2. connect both speaker outputs of the cheap reciever to the speaker input on your subwoofer. make sure both black (-) outputs on the reciever connect to the black input on the sub, and the red outputs (+) on the reciever are both connected to the red input on the subwoofer.
3. make sure the cheap receiver's volume is all the way down. turn your Sony up to about the loudest you'll listen to it. turn up the subwoofer amp until it's loud enough to sound good.
4. leave the subwoofer amp alone, the Sony volume will all you ever need to touch from now on.

You can even now turn off your subwoofer / adjust the volume easily now!

According to the KLH manual for the 9906 "6 pack" with the BassBite sub... it says "if your sub is connected via the speaker - level terminals, your reciever must be set for "NO" subwoofer - even though you are using one. VErify proper polarity on your speaker connection wires. (red or gold to +, black or silver to -). Depending on how you have your woofer connected to the reciever, if connected to a reciever without a subwoofer out then set your reciever for LARGE speakers and turn the subwoofer setting "OFF". Failure to do so will result in little to no bass. If you do have a subwoofer out from your reciever adjust your speaker size setting to small or large speakers as appropriate. Set the recievers sub output to ON. Connecting small speakers to a reciever set for LArge speakers can result in damage to small speakers.

Hope this helps.