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post #2176 of 2388

What tubes do you have in?

 

Quote:
Originally Posted by davidgotsa View Post

The buzzing noise doesn't annoy you? I just got my HE-500's today and am using it with the Lyr and whenever I play quiet songs it drives me crazy. 
 



 



 

post #2177 of 2388

I've only tried with the 6N1P's and the stock ones, JJ or whatever they're called. Both make the same buzzing sound when I turn the volume up to the level I want it to be. 
 

Quote:
Originally Posted by Misterrogers View Post

What tubes do you have in?



 

post #2178 of 2388

And where is that level roughly with the HE-500's?

post #2179 of 2388

Roughly at 10-11. Below 9 it's completely silent. 
 

Quote:
Originally Posted by Misterrogers View Post

And where is that level roughly with the HE-500's?



 

post #2180 of 2388

Hmmm, I'll go back and roll in those tubes tonight - don't remember the gain on them. My Lyr(s) are fed by Bifrost, and I have to turn the colume up to 2 to hear anything at all. Your hum/noise is definitely something I haven't experienced. Could be (one or any combination of)...

 

1. Tubes.

2. DAC output feeding Lyr.

3. Power strip/grid noise.

4. Your IC's.

 

Feel like hunting? It'll take some effort, but you should be able to improve if not eliminate that noise.
 

Quote:
Originally Posted by davidgotsa View Post

Roughly at 10-11. Below 9 it's completely silent. 
 



 



 

post #2181 of 2388

Yea, it would be great if it could go away. That's the only thing bothering me with these He-500, if that noise goes away I'll be 100% happy. 

 

 

1. I don't know if it's the tubes but they make exactly the same noise at the same volume. 

2. I have the Fiio E10 as a DAC at the moment. 

3. You mean the power given to the Lyr? Someone mentioned "grounding" 

4. Don't know what that is. 

 

Quote:
Originally Posted by Misterrogers View Post

Hmmm, I'll go back and roll in those tubes tonight - don't remember the gain on them. My Lyr(s) are fed by Bifrost, and I have to turn the colume up to 2 to hear anything at all. Your hum/noise is definitely something I haven't experienced. Could be (one or any combination of)...

 

1. Tubes.

2. DAC output feeding Lyr.

3. Power strip/grid noise.

4. Your IC's.

 

Feel like hunting? It'll take some effort, but you should be able to improve if not eliminate that noise.
 



 



 

post #2182 of 2388
Quote:
Originally Posted by davidgotsa View Post

I've only tried with the 6N1P's and the stock ones, JJ or whatever they're called. Both make the same buzzing sound when I turn the volume up to the level I want it to be. 
 



 

 

Your post isn't the first I've seen when searching the boards referring to buzzing with the HE-500s & Lyr.   The 500's are just so darn sensitive.  I don't think the other poster(s) posted long enough about it to have a resolution though.  I'm interested in hearing your progression with them.

 

I'm still not sure what orthos do universally different to sound than dynamics.  IMO there's too much emphasis placed on driver tech in cans.  Same with IEMs.  BA versus dynamic.  I never hear a can and say "this is BA, and this is dynamic", I just hear the overall detail and signature and prefer one over the other. I like my Hifiman RE0, I like my Sure 535s.  I never think in terms of "BA versus dynamic".  I think mostly in terms of wanting a flat response (RE0) versus an HD650/tubey sound from the 535's. 

 

I've been curious about orthos....and part of me wonders "are the new expensive breed" of cans really worth the premium over the old flagships?"

 


 

 

post #2183 of 2388

HE-500s still much lower sensitivity than my Grado's, and I can just faintly hear a bit of hiss with 6N1P's in.  However, it is NOT coupled to the volume control.  Since the tubes are used for voltage and not current gain, I don't think a hiss, hum or other noise that varied with volume are related to them and are likely something upstream (either power or source).

 

If you unplug the line-in cables (so just the power cable and headphones are connected to the Lyr) do you still hear the noise at those volume positions?  If not, it's coming from your source, if so it's likely coming in the AC line.  (There's also the possibility of a ground loop between your source and Lyr).

 

Eliminate the various possibilities through troubleshooting techniques and what's left is the likely culprit.  You should be enjoying the music!

post #2184 of 2388

Describing the HE-500s as sensitive is just completely wrong for starters. As far as headphones go the HE-500 is one of the least sensitive. The most likely culprit for the hum sound is a ground loop issue which if you read the documentation that came with the amp is clearly identified. My Lyr had hum starting at around 2 o'clock on the volume dial and it completely disappeared with the use of a 2 prong converter. 

 

It is now completely dead silent even if turned to full volume. What also worked great was simply taking a set of pliers to the ground prong of the power cord. Problem solved. The surge protector I'm using is grounded so no worries there. I couldn't be happier with this amp. 

 

The HE-500 has absolutely nothing to do with the hum noise whatsoever. 

post #2185 of 2388

Thanks a lot to both of you. I know absolutely NOTHING about electricity and how it works, or even how amps work for that matter, so I appreciate your help. 

 

I did unplug the line-in cables and the sound went away. 
 

Quote:
Originally Posted by SeaHawk View Post

HE-500s still much lower sensitivity than my Grado's, and I can just faintly hear a bit of hiss with 6N1P's in.  However, it is NOT coupled to the volume control.  Since the tubes are used for voltage and not current gain, I don't think a hiss, hum or other noise that varied with volume are related to them and are likely something upstream (either power or source).

 

If you unplug the line-in cables (so just the power cable and headphones are connected to the Lyr) do you still hear the noise at those volume positions?  If not, it's coming from your source, if so it's likely coming in the AC line.  (There's also the possibility of a ground loop between your source and Lyr).

 

Eliminate the various possibilities through troubleshooting techniques and what's left is the likely culprit.  You should be enjoying the music!

 

2 prong converter? Could you explain what that is? How is it possible to convert the 2 prong to 3 prong? Wouldn't I have to take off the 2 prong that is on now and "rewire" it with a 3 prong? 

 

Pardon my ignorance. 

 

I live in Europe, if that changes anything.

Quote:
Originally Posted by detoxguy View Post

Describing the HE-500s as sensitive is just completely wrong for starters. As far as headphones go the HE-500 is one of the least sensitive. The most likely culprit for the hum sound is a ground loop issue which if you read the documentation that came with the amp is clearly identified. My Lyr had hum starting at around 2 o'clock on the volume dial and it completely disappeared with the use of a 2 prong converter. 

 

It is now completely dead silent even if turned to full volume. What also worked great was simply taking a set of pliers to the ground prong of the power cord. Problem solved. The surge protector I'm using is grounded so no worries there. I couldn't be happier with this amp. 

 

The HE-500 has absolutely nothing to do with the hum noise whatsoever. 



 

post #2186 of 2388
The hum only starts on mine around 2 pm on the dial as well (AKA ear bleeding volume levels).
post #2187 of 2388

Can you pull the plug out of the wall, turn it upside down and back in?  Hopefully it's as simple as that (match the AC phasing!  I like useless terms like that!) :)

(As far as the "third prong", there's likely a metal "stripe" that goes down the side of your round plug separate from the two pins - in the US and UK it's another prong rather than on the side of the plug..)

 

Is everything in your system plugged into the same wall outlet/power strip?

 

If that doesn't do anything, do you have a receiver (with connected speakers and power ;) ) that you could plug in the cables currently going to the Line In on their Lyr?  (Unfortunately you'll likely have to move stuff around).  We want to see if you still hear that noise from your source on something other than the Lyr.  If you do, there may be an issue with whatever device is your source, otherwise it's likely a ground loop.


Edited by SeaHawk - 2/22/12 at 1:37pm
post #2188 of 2388

ahhh, I have no idea about European power cords/outlets. Here in North America there are older houses that didn't have the grounded 3 prong outlets when they were first built. Therefore you can buy an adapter that goes from 3 prongs to 2prongs with a metal ring to attach to the screw in the centre of the outlet which would then provide the ground...

 

As far as European outlets etc. go I have no idea. 

 

You could also try a ground loop isolator: http://www.radioshack.com/product/index.jsp?productId=2062214 I bought one and it helped a little but some have had good success but it was removing the ground from the equation with this amp that equaled dead silence. In my communications with Jason around this issue he indicated they may try to source 2 prong power cords in the future. Maybe some fellow Europeans can assist you in how to get rid of the ground loop issue

 

post #2189 of 2388

Okay so I feel kinda stupid. The outlet that I was using didn't even have the grounding thing.  It's a pretty old apartment...

 

But then I moved everything to the kitchen which is pretty new, and there the outlets had that third little thing on the top to ground everything. 

 

The hum was gone, what a relief!

 

Thanks again! 

post #2190 of 2388

No worries! Glad you were able to track it down definitively in short order. 
 

Quote:
Originally Posted by davidgotsa View Post

Okay so I feel kinda stupid. The outlet that I was using didn't even have the grounding thing.  It's a pretty old apartment...

 

But then I moved everything to the kitchen which is pretty new, and there the outlets had that third little thing on the top to ground everything. 

 

The hum was gone, what a relief!

 

Thanks again! 



 

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