Try to get rid of hum, or change setup? - AVS | Home Theater Discussions And Reviews
Baselworld is only a few weeks away. Getting the latest news is easy, Click Here for info on how to join the newsletter list. Follow our team for updates featuring event coverage, new product unveilings, watch industry news & more!

Forum Jump: 
Thread Tools
Old 09-29-2010, 11:49 AM - Thread Starter
liight's Avatar
Join Date: Sep 2010
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
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.
liight is offline  
Sponsored Links
Old 09-29-2010, 12:16 PM
AVS Special Member
m_vanmeter's Avatar
Join Date: Feb 2006
Location: Georgetown, KY
Posts: 5,453
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Liked: 23
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). just split the cables apart to feed the two speakers.

and this adapter

for less than $10 or $12 you can test the speakers with the speaker level to line level adapter removed.
m_vanmeter is offline  
Old 09-29-2010, 12:33 PM
AVS Special Member
wwinkler's Avatar
Join Date: Jul 2009
Location: northern virginia
Posts: 1,364
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Liked: 24
Radio Shack also sells them. They sometimes help (or completely solve the problem).

You can first try to plug the receiver, subwoofer, and powered speakers into the same plug (using a surge protector).
wwinkler is offline  
Old 09-29-2010, 04:43 PM
Senior Member
dwong's Avatar
Join Date: Oct 2004
Location: SD,CA
Posts: 223
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked: 12
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.

I see the atoms free and fine,

That bubble like a sparkling wine;
I see the songs Electrons sing,
Jumping from ring to outer ring;
              - Lister, The Physicist
dwong is offline  
Thread Tools

Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off