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Try to get rid of hum, or change setup?

post #1 of 4
Thread Starter 
I currently own a pair of Audioengine A2 bookshelf speakers and the Audioengine S8 sub. I recently received a Panasonic VSX-820 as a gift and currently have the powered A2s connected via a line level converter. I get a constant hum/static noise from the speakers when there is no signal. Could this be due the the line level converter's unshielded cables? The A2s have an auto "idle setting" when there is no audio played.

So, should I invest more time and money trying to get rid of the hum or sell the A2s and get passive speakers? Assuming I can get ~$160 for the A2s, I'd be willing to spend an extra $100 bucks or so for a little more performance. However, if I can get rid of the hum completely, I'd be perfectly happy.
post #2 of 4
are the A2's plugged into the same outlet as the receiver ? Hum could be a groundloop.

another way to test the A2's and your receiver is to use the Headphone outlet to drive the speakers. Headphone outlet volume can be set low enough to be line level.

You will need a 1/4" stereo phono plug to 3.5mm stereo adapter and a simple 3.5mm stereo plug to two RCA male connector cable to feed the A2's. (I assume they have a RCA female input).

http://www.monoprice.com/products/pr...seq=1&format=2 just split the cables apart to feed the two speakers.

and this adapter http://www.monoprice.com/products/pr...seq=1&format=2

for less than $10 or $12 you can test the speakers with the speaker level to line level adapter removed.
post #3 of 4
Radio Shack also sells them. They sometimes help (or completely solve the problem).

http://www.parts-express.com/wizards...oop%20isolator

You can first try to plug the receiver, subwoofer, and powered speakers into the same plug (using a surge protector).
post #4 of 4
I using something like this to solve groundloop hum.
iso xfrm

You can pick one of those type at local used electronic store from $5 to $15bucks.
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