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The HeadAmp GS-X and GS-X MK2 Thread - Page 167

post #2491 of 5220
Quote:
Originally Posted by Steve Eddy View Post

If the hum field is largely magnetic, a sheet of steel should work well.

se
Thanks, SE. If I have hum I will give it a try.
post #2492 of 5220

i did buy some mu-metal sheet (thin) to see if it would work. i havent tried it yet. it is ridiculously expensive. if you do want to stack and can separate with air you need about 6". this all depends on the sensitivity of your phones and gain setting.

HeadAmp Audio Electronics - home of the Pico and Gilmore amps.  Now with Audeze, Fostex, HiFiMAN, Sennheiser, and STAX.
Find us at www.HeadAmp.com

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post #2493 of 5220
Quote:
Originally Posted by justin w. View Post

i did buy some mu-metal sheet (thin) to see if it would work. i havent tried it yet. it is ridiculously expensive. if you do want to stack and can separate with air you need about 6". this all depends on the sensitivity of your phones and gain setting.

The problem with mu-metal is that it saturates at relatively low levels. It can be effective (it can have crazy high permeability) but if the field strengths are high enough, it should be combined with some steel (on the field source side) to knock the field level down to a level that the mu-metal can handle.

se
post #2494 of 5220
Would isolating feet have any effect on this hum or is it due magnetic fields and close proximity?
post #2495 of 5220
Quote:
Originally Posted by bigfatpaulie View Post
 

Interesting - a gate company.  I never would have thought to contact one, but I suppose it is just metal fabrication.  Thanks for the tip!

.............but do you want all that metalwork surrounding your system?

post #2496 of 5220

WHAT IS THE NEWEST VERSION OF GS-X?

i saw in the site that it cost 

700$ for Alpha version and

750$ for Dact Version.

what is the diffrences and i saw that it one of the most recomended amps for HD800.

750$ is the price of this magnificnt amp or there is more to spend. i am newbie in the buissnes (-:

post #2497 of 5220
I wish i could buy the parts for $750! That is the 25% deposit

HeadAmp Audio Electronics - home of the Pico and Gilmore amps.  Now with Audeze, Fostex, HiFiMAN, Sennheiser, and STAX.
Find us at www.HeadAmp.com

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post #2498 of 5220

Not sure if they can be classed as isolating feet, but those that can be seen in the two photo's are what I'm using to put my GS-Xmk2's units on.

The photo's are also showing my mini rack which is made of steel then powder coated matt black.

 

Although in using the mini rack the amp section and PSU are only around 2" apart, there is NO unwanted noise, it's just music bliss.

 

    

 

I've obviously taken my GS-X and mini rack off my main audio rack to try and show better photo's, don't know if I've been successful though.

It was dull outside [ again ]

post #2499 of 5220

HOW MUCH COST THE GS-X? and what is the newest model?

post #2500 of 5220

The cost is 3000 for DACT or 2800 without; the $700 and $750 is just a 25% deposit :)

post #2501 of 5220
Quote:
Originally Posted by David1961 View Post
 

Although in using the mini rack the amp section and PSU are only around 2" apart, there is NO unwanted noise, it's just music bliss.

 

2" is all I needed as well.  Keep in mind the hum is only noticeable on high gain and iems.  Not really something you'd even really do but once you know it's there... you do what you can to remove it.  I use mine in a desktop rig under my screen so it made more sense to put the supply on a platform on the ground that raise the amp and screen to match ;)

post #2502 of 5220
Quote:
Originally Posted by listen4joy View Post

HOW MUCH COST THE GS-X? and what is the newest model?

When I ordered the GS-X ( July 2012 ) it was actually for the mk1, but after about 3 months Justin sent me an email saying he was starting with the mk2 and would I like that version or keep with the mk1. As can be seen I opted for the mk2.
The price I paid which as said was for the mk1, was $2595.
I think the GS-Xmk2 is an excellent amp, but IMO not as good as the BHSE, but not that far behind.
post #2503 of 5220
Quote:
Originally Posted by listen4joy View Post
 

HOW MUCH COST THE GS-X? and what is the newest model?


You can go to :

HeadAmp Audio Electronics - www.headamp.com

GS-X Mk II is the latest model, available with 2 different volume control types.

And there is no reason to shout in all capital letters, be nice ;).

post #2504 of 5220
Quote:
Originally Posted by David1961 View Post

I think the GS-Xmk2 is an excellent amp, but IMO not as good as the BHSE, but not that far behind.

 

I didn't much like the HD800 out of the BHSE :P

post #2505 of 5220
Quote:
Originally Posted by justin w. View Post
 

i did buy some mu-metal sheet (thin) to see if it would work. i havent tried it yet. it is ridiculously expensive. if you do want to stack and can separate with air you need about 6". this all depends on the sensitivity of your phones and gain setting.

 

 

Quote:
Originally Posted by Steve Eddy View Post


The problem with mu-metal is that it saturates at relatively low levels. It can be effective (it can have crazy high permeability) but if the field strengths are high enough, it should be combined with some steel (on the field source side) to knock the field level down to a level that the mu-metal can handle.

se

 

This guy here (the developer of the Emitter, Friedrich Schäfer) :

http://www.positive-feedback.com/Issue66/asr_emitter.htm

 

He takes a different approach. When building his first amps, he experimented with various materials for the housing and finally settled for acrylic which does allow for the electro magnetic field to expand freely. He is separating power supply and the amp itself and it seems to work pretty well for his concept for over 25 years.

 

quote from :

http://www.asraudio.com/Epdf/IEASRConcept.pdf

[...The main amplifier case is made from rigid & resonance-free acrylic glass instead of other highly resonant metal material –
This acrylic material is audibly more neutral & smooth sounding than any metal material, especially it does not counter-react ( electric & magnetic ) with the sensitive component inside the amp unit.]
 
I think, not stacking in the first place is better than trying to cage in the field and therefore influence the circuit/signal inside the housing.

Edited by icebear - 3/28/14 at 4:26am
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