Whitigir

Nice going, I can not wait to hear your impressions between GG and T2

I made my Carbon with their transformer. It was expensive, but there is 0 noises or hums that I could observe. But I am not a pro about it though. I do know for the fact that it was expensive

Toroid is pretty good, and made in USA . Expensive, even with group buy, single purchase is even more expensive https://toroid.com/

Thanks Soren for the boards! Something fun and exciting in the future

Anyone has spare boards laying around ? Very interesting in it, please PM me

Wow! How does it sound ?

I wonder how a Carbon will change by using these tubes, they are expensive though....but could it get close to T2 performances

So...has anyone ever tried this ?

Thank you Spritzer, I hope and cross my fingers they are still authentic as I have placed a few order with them.

Does anyone know if pacificsemi.com is selling authentic semiconductors ? Or are they counterfeit ?

The upper mid of Utopia is the exact reason why I went with Stax 009. Though, I can not deny that Utopia is a great headphones as it has many things that was done right on it. Essentially it can be plugged into anything and play unlike Stax 009 which needs a proper energizer :). It is hard to see other dynamic headphones that can achieve what Utopia can out of portable devices. I literally meant it, I can just plug it in an IPad and have it sound wonderful, and ofcourse except the quality of an IPad DAC and output is shitty...lol...Utopia is wonderful with WM1Z, a combination that can be taken on the go and to many places....then when talking about amping and DAC chain the Utopia it would scale up (being desktop and stationary), but I rather stick with Stax 009 stationary system i have no regret moving up to 009+ carbon, trully an amazing feasts. Possibly looking into T2 as I have heard that T2 is the Ultimate end for Stax

Wooo! Creative !! And awesome

I grabbed my DAC to go with my Carbon and new found addiction about Stax ! such expensive and dangerous Addiction

I used this one from Mouser http://www.mouser.com/Search/ProductDetail.aspx?R=ULV7F2GSS341virtualkey61200000virtualkey612-ULV7F2GSS341

I used the one from Mouser from a few pages back. They had different color too

Some more touches on the finish . Finally my Stax socket is here....need to fill up the other socket hole lol...but maybe later

It does drift away as it warm up though. It can start out as +/- 0.5 or 0.9V and hang around +/- 50mV after 10 minutes. But then after 20 minutes or so, it would hang around +/- 125 to 320 mV. I will check again today

lol, my apologize I am a complete noob regarding Stax and it game thank you all all so much for the helps and assists ! So much love in here ! Cheer

Well, so what I figured so far was that my DN2540 was partially defected as I removed it and measure 25 ohm something from GD. Replaced it, and the amp was being tuned when it was very warm. These numbers fly all over the place. I let it cool down and readjust....now both the offset is from -50mv to +50 mV from cold to slowly warming up with Servo engaged. the numbers above should be great ? however as the temperature change, it will drift away

Well, so now I did a bit different. I toned balance to be 300mv or less, and then offset to be 500mv or less. Then I popped in the Servo. Now one board start out from 0.55 V drop to 150-200mV. The other board (problem one) started from -1.6V and now dropped to -200 or -300mV

L4 = -14.95 , L3= 0.00, L7 = 14.96

I just replaced that Op27 too, and together with DN2540. What else could be problematic ?

Yes, that seems to be the case

Leg 2 is 0V and leg 6 is -1 V on both. I replaced the dn2540 and it is still similar. It starts around -1.5 or -1.6V and hang around -0.4 to -0.6. After 10 minutes with Servo dropped in, both board is hanging around -100 to - 200mv the problem board now hang -350mV to -650mv after the replacement of dn2540

Yes, I have already measured all values to be equally across both boards on balance, offset, current adjust. However, when I put in the Servo, one of my board has that huge voltage gap ? I also replaced the Op27. I hear for Opto Servo we need more than 10V , so my offset is now at 18-18.3V after 20 minutes