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What the heck?

72.211.68.9

Posted on May 13, 2015 at 18:40:34

mashley
Audiophile

Posts: 355
Location: New Orleans
Joined: July 31, 2010

I recently replaced a bunch of resistors in my Set Monos from janky old beyschlags to Tants and carbon films.
Just today I had my amps running with mys stats off and I could hear my (front end) music coming out of the amps? I thought huh, am I hallucinating this is weird? Put my ears around the amps with the covers off and I could actually hear music coming out of the final transformer!

Thinking I have really gone and mis-wired something?

Anyone?

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RE: What the heck?

caffeinator

09:57:17 05/15/15

RE: What the heck?

Paul Joppa

00:52:13 05/14/15

RE: What the heck?

Triode_Kingdom

22:45:50 05/13/15

...

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RE: What the heck?

caffeinator

09:57:17 05/15/15

RE: What the heck?

Paul Joppa

00:52:13 05/14/15

RE: What the heck?

Triode_Kingdom

22:45:50 05/13/15

RE: What the heck?

mashley

16:33:09 05/18/15

RE: What the heck?, posted on May 13, 2015 at 22:45:50
Triode_Kingdom Audiophile Posts: 10049 Location: Central Texas Joined: September 24, 2006	The amps were running but the speakers were off? How exactly are you doing that?

RE: What the heck?, posted on May 14, 2015 at 00:52:13
Paul Joppa Industry Professional Posts: 7296 Location: Seattle, WA Joined: April 23, 2001	It's not unusual. The transformer core responds to fluctuating magnetic fields, both through magnetic forces and through magnetostriction. Tightening the screws sometimes reduces the audibility. Sometimes you can hear hum with the amp off and unplugged - picking up local magnetic fields from house wiring etc.

RE: What the heck?, posted on May 15, 2015 at 09:57:17
caffeinator Audiophile Posts: 1729 Location: Pacific Northwest Joined: August 22, 2003	I've heard this a few times when running amps into dummy loads to break them in. After the break-in time, I connected speakers, and forgot all about it, of course. I'm pretty sure I posted the same question here, or on the Bottlehead forum once, and I got pretty much the same answer...maybe even from Paul...eerie :)

RE: What the heck?, posted on May 18, 2015 at 16:33:09
mashley Audiophile Posts: 355 Location: New Orleans Joined: July 31, 2010	" The amps were running but the speakers were off? How exactly are you doing that? " Stats - Unplugged with no charge (24hrs later) and also tried with no speakers attached to the amps, still hearing it. If the trafo is vibrating that sound out of itself to my mind that would mean it ought to be introducing some distortion? Audio Note iron too.

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