Audio problem My Zenith XBS444 system starts to emit a loud low hum and the audio deteriorates after being on for about 5 minutes. This is new behavior in the last week.

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.

Check to see at 5:00 is their something that you turn on. It sounds like you might have a feed back problem from other appliance.

Are you sure that's what it is? Something is heating up for sure.

It could be protecting itself because something in the volume control is going bad and sending too much current through the amp or any other reason. In other words, you can guess and buy parts hoping to nail the symptom but not knowing the cause, or you could let a technician do it.

Depending on the location you're living, try to connect a good ground to your system might solve the problem

One source of hum is from bad rectifiers in the car alternator, if this problem stops when key is turned to accessory then have your alternator checked for bad rectifiers.Good luck and please don't forget to rate.

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battery needs replacing

Since not all devices have the same in/outputs available, if you are trying to interconnect them, it helps to know the make and model of both, not just one.

There are several possibilities to connect external devices to your 'home theatre' system.
The one we have delivers the best when S-video is used but that requires a separate path for sound.
The standard colors for audio in and outputs are red(=right) and white(= left) and often cables are supplied with the same color coding.

The usual connections will be named 'Line in' and 'Line out.' The outputs deliver specified voltage into a specified load (or termination) and the inputs expect that condition.
This ensures that volume controls act in a sensible manner.

I just posted the fix for this problem under the post of davidlentz who is having the same problem. Problem is IC706 located on the audio output board Part number is KIA7805A.

Look in the computer music mags and look fro M-Audio dealers. Ring them up and tell them the problem your having and see how much it will cost to fix. If it's humming then it's proably broke and needs repairing. Just make sure the sampel rate isn't set too low as well