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The HeadAmp GS-X and GS-X MK2 Thread - Page 4

post #46 of 3616

Heck to make it easy for you - Justin:

 

DACT stepped attenuator

 

Black

 

Done.

post #47 of 3616
Quote:
Originally Posted by Mr.Sneis View Post

Mind if I ask what are the pot choices and panel choices?  I guess I should wait for teh e-mails.

 

DACT stepped attenuator or Alpha 21mm potentiometer: http://alphapotentiometers.net/html/21mm_pot_4.html

 

For the panel colors, i'm open to anything, but if you wanted red, for example, and nobody else wants red, I have to order a 2nd set of panels in red in case there is a flaw on one of the parts.  so there would be some additional cost, probably around $200 for a one-off color.

 

by the way, someone should get red, i've never done it on a big amp and i think it would look cool.


Edited by justin w. - 10/30/12 at 2:15pm

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post #48 of 3616
I'd love a silver panel GS-X. Might have to wait for some other folks to get silver with me.
post #49 of 3616
Quote:
Originally Posted by MomijiTMO View Post

I'd love a silver panel GS-X. Might have to wait for some other folks to get silver with me.

 

black or silver will be popular so you dont have to worry about that

HeadAmp Audio Electronics - home of the Pico and Gilmore amps.  Now with Audeze, Fostex, HiFiMAN, Sennheiser, and STAX.
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post #50 of 3616
Awesome!

smily_headphones1.gif
post #51 of 3616

Well I guess I would go for DACT, black, and red led!

post #52 of 3616

are the dimensions the same as the original?
 

 

Has anyone used the GS-X as a preamp? results?  I'm assuming you can just add a power amp and you'll have most of a system ready to go?


Edited by tme110 - 10/31/12 at 4:47pm
post #53 of 3616

GS-1/GS-X are great preamps.

post #54 of 3616
Quote:
Originally Posted by Solude View Post

Justin, any assembled power supplies to show off?  Also for the Alpha pots, any testing being done to ensure they track reasonably?

 

power supply:

 

 

1000

HeadAmp Audio Electronics - home of the Pico and Gilmore amps.  Now with Audeze, Fostex, HiFiMAN, Sennheiser, and STAX.
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post #55 of 3616

Loctite is in, getting close now :D

 

Can't tell from the angle, are those the 35VA transformers?

post #56 of 3616

Looks like it's enough space to go with the next size up transformer?  


Edited by preproman - 11/2/12 at 5:46am
post #57 of 3616

Justin, what's the output impedance on the new GS-X in both single-ended and balanced modes? Thanks!

post #58 of 3616
Quote:
Originally Posted by MellowVelo View Post

Justin, what's the output impedance on the new GS-X in both single-ended and balanced modes? Thanks!

 

i sent my amp to KG to check out, he still has it and i haven't measured the output impedance.  i'll see if he can check it before he ships it back

HeadAmp Audio Electronics - home of the Pico and Gilmore amps.  Now with Audeze, Fostex, HiFiMAN, Sennheiser, and STAX.
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post #59 of 3616
Quote:
Originally Posted by justin w. View Post

 

i sent my amp to KG to check out, he still has it and i haven't measured the output impedance.  i'll see if he can check it before he ships it back

Awesome! Thanks for checking!

post #60 of 3616
Quote:
Originally Posted by MellowVelo View Post

Awesome! Thanks for checking!

response:

 

 

So measuring the impedance of the gsx is not going to be so easy, i need a booster
amplifier for the signal generator because the gsx tests so low. At full blast on the generator
which is 20 volts peak to peak...
 
Here are preliminary numbers. single ended. 
 
At 10x gain, at 1khz, the output impedance is between .2 and .3 ohms
at 10x gain at 20khz the output impedance is between .4 and .5 ohms
 
at 1x gain at 1khz, the output impedance is less than .1 ohm
at 1x gain at 20khz the output impedance is less than .2 ohms
 
I can't put enough voltage into the back end of the resistor to accurately measure
the signal at the output of the gsx.
 
Measuring balanced is also not going to be so easy, i may use an isolation transformer
for this, but it almost has to be double the impedance above.

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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