Thanks ... I am very happy when finish everything without any error. Because I don't have any soldering experience and this is a good chances for me to learn "how to DIY an amplifier". :D

I successfully built my S.E.X without any error. Silent background & sound great with my HD650. I love it .... I think next step should get an audiophile power cable for it... :D  

Thanks NightFlight, is it this one ?    http://www.amazon.com/gp/product/B00KCTRYGC/ref=s9_hps_bw_g469_i1

Thanks Jamie & DD, I will check bottlehead forum. I plan to get S.E.X to pair with my HD650 & bookshelf speakers :)

Hi all, I just ordered a S.E.X. and it coming soon. Now thinking to get some tools. I am a beginner and don't have any solder experience. May I know Kester 44 Rosin Core Solder 60/40 or 63/37 is suitable for beginner ? Thank you.     (Sorry for my poor English.)

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I try to pair K2 SP with Furutech GT40 desktop dac/amp and it sound impressive. The sound is clean, detail and spacious. I feel comfortable with this combination. Anyway, I think GT40 a bit overpower for K2 and it will be too loud when turn volume above 9 o'clock. So I hope I can get a Quickstep...

Thank u very much Tai.  I try to search for them. :) 

  Hi Tai, I just got my K2 SP last month. Anyway I still searching nice source to pair with it. I try following combination but still feel they are not a good combination ...   1. Direct connect with iPod Classic 5th - lack of detail. 2. Direct connect with iPod nano 7th - too bright 3...

Hi ClieOS, is it good idea to pair iPod nano 7 directly with RE272 ? ...