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Speaker amps for headphones - Page 134

post #1996 of 3116
Quote:
Originally Posted by Chris J View Post


All resistors have inductance.
You can't get rid of it.
Even a piece of wire has inductance.
I assume you meant Low Inductance?

But In practice, if it's small enough, you can ignore it, especially at audio frequencies.

BTW, I've seen very hot ceramic resistors in the field. As a few posters have pointed out, some types do run extremely hot at full power, so may seem pretty damn hot at say 25% of their power rating.

Chris, this is from the Mouser catalog: Description:     Wirewound Resistors - Through Hole 3watts 0.25ohms 1% Non Inductive

 

So even though they are low inductive like you say it is common industry practice to call them non inductive.

post #1997 of 3116
Quote:
Originally Posted by ALRAINBOW View Post

Yes I did sorry . It's just low enough to be ignored. So far very happy with the amp right now. I have two more to try out , when I can. But I do not expect to get anything more out of ot , maybe less. After what I heard yesterday I think my stax rig can in some ways do it better. I see you are up late .

 



I'm actually just outside Toronto, same time zone as New York.
Canada is the "54th" or "55th" state (somewhere after the various territories, etc)!
post #1998 of 3116
Quote:
Originally Posted by robrob View Post

Chris, this is from the Mouser catalog: Description:     Wirewound Resistors - Through Hole 3watts 0.25ohms 1% Non Inductive

 

So even though they are low inductive like you say it is common industry practice to call them non inductive.

 



Don't sweat it too much folks.
I've spent too much time around Switchmode Power Supply designers who will always tell you all inductors have resistance and capacitance, all capacitors have inductance and resistance, all transistors.....etc, etc, etc.
So I blame my reprobate behaviour on Switchmode Power Supply designers.
post #1999 of 3116
I figured that , that's why I said you were late !

Al
post #2000 of 3116
LOL. In a perfect world it is all true and in designing I guess it's a good practice to have.
post #2001 of 3116

I have just bought the integrated Leben CS-600 amp with built-in headphone output and switchable headphone mode. I have to say that it is a great match with my speakers and HD800 too! Very detailed but relaxing and musical sound with the HD800.


Edited by seaice - 12/20/13 at 9:56am
post #2002 of 3116

The  Leben CS-600 is good but  pricey. 

post #2003 of 3116
Wow. May I ask how much you payed for it ??? The one on eBay is over 5 k.
and it is used.
post #2004 of 3116

I was very happy and paid less than 3800USD for a demo unit from our local distributor with upgraded tubes and 1 year warranty. The sound is really great! I have never heard the HD800 so sweet and musical. And the HD800 bass! Just wow!


Edited by seaice - 12/20/13 at 12:43pm
post #2005 of 3116
Cool I'm glad it sounds great. Those headphones are tough to please.
Almost as bad as the HE6. But I'm sure that amp will do well
With that amp too. I have to try my HD800 with my krell amp
post #2006 of 3116

The HD800 are tricky.

 

I have tried 3 head-amps with the HD800:

Audio-GD Phoenix (balanced HD800): The Phoenix was great with my old AKG701 but it is not the ideal amp for the HD800.

Little-Dot MKVIIIse (balanced HD800): Very solid performance with the HD800. The HD800 are pretty enjoyable and more musical than with the Phoenix. It is possible that the space is bigger, more 3D and more precise than the Leben. But I have no good RCA cables for the Leben at the moment and have to verify this in a longer run...

Leben CS-600 (single-ended HD800): Musicality and sweetness! Best HD800 bass. Everything sounds very nice, even bad recordings. Highs are detailed but so enjoyable, no tsss and peaks at all!

 

Ask me again for several months :) The Leben is my favorite at the moment. The best match with the HD800 so far.


Edited by seaice - 12/20/13 at 1:12pm
post #2007 of 3116

Here's some common resistor values to reach a desired level of attenuation:

 


Edited by robrob - 12/22/13 at 4:34am
post #2008 of 3116
i have figured out my resister heat problem . I just put two 20 ohms in parralell so all is better now. with the amp i am using now i need the attenuation and proper loading of amp output. with the he6 its fine with no attenuation but there is a slight low hiss and with the HD800 the his is there but attenuation is a must to get to 1/3 of the volume level and not be very loud. thanks so much .

al d
post #2009 of 3116
Quote:
Originally Posted by robrob View Post
 

Here's some common resistor values to reach a desired level of attenuation:

Headphone_Network_Common_Values.jpg

 

Wow, thank you Rob!  That's a picture worth a thousand words - a keeper, for sure - much appreciated!

 

Mike

post #2010 of 3116
Quote:
Originally Posted by ALRAINBOW View Post

i have figured out my resister heat problem . I just put two 20 ohms in parralell so all is better now. with the amp i am using now i need the attenuation and proper loading of amp output. with the he6 its fine with no attenuation but there is a slight low hiss and with the HD800 the his is there but attenuation is a must to get to 1/3 of the volume level and not be very loud. thanks so much .

al d

Nice!  Glad to hear you got it worked out!

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