I seldom exchange the firmware, so, I havn't encounter the problem, I will have a try later to see how will be happened.

 I agree with you that the sound signature will not changed that much by burning.in.   But maybe you don't quite understand what I mean after buring in, the highs will be more "smooth", say, not harsh, and not fatigue. So, I describe as fun.   Yes, I have very similar experience of...

    I would like repeat again. I hope to see your new post on commenting the bass and highs after 500 hours or more  burning in time.  It is unbelievable that after 500 hours buring, the Living almost become other pair of earphone.    To me, before the first 100 hours of burning  in. I...

 Great review.  I have one pair of Living too. I have the similar experience as tomscy2000     But after about 500 hours burning , the highs is much more smooth and fun. it is totally improved. If you have only 50 hours burn in, it is not enough.    Regard to the bass, maybe it is depend...

    To debate the components is meaningless. For every factory can buy the same components, but the sound of their products are too different. Hisound Audio has applied the SIGMATEL chip for 2 years, the sound quality is granted by many audiophiles. So, I would like to compared and discuss...

  the STUDIO-v is made up of the audio- grade parts, So burn in is necessary. If you have chance to verify it, you will see the sound  difference of the first day and the next few days.

Quote: I got mine directly bought from Hisoundaudio. the shipping fee cost me only USD20 by DHL.  

  With my SE 530, and MP3 320 files, I listen to the STUDIO-V with the volume of 11, the battery playing time is about 75 hours.   Quote:  

  great review.   As to the hiss, with most of my dynamic earphones, I almost hear no hiss with STUDIO-V. And with SE 530, only very slight hiss can be detectived at the quiet night, which can be ignored when the music is playing.

  It seems that Hisoundaudio are focusing on STUDIO now. STUDIO will have new Version soon, And I was told that the price of the Signature STUDIO is USD 550, near 4 times expensive than AMP3 PRO2.  

Quote: Originally Posted by a_tumiwa thanks for the info , fatman at least we know that Hisound Studio will have 2 versions, standard Studio for low sensitive phone and Studio I for high sensitive phone i hope someday the special edition Studio with higher end component will come...

To be frankly, the stock IEMs with the ROCOO is also very good one. I can't find one is better than it with my inventory which priced under USD 100.

Quote: Originally Posted by Albinoni Here's my reasons and rant re this topic: 1. Portable amps/CMOYs or what ever you call them tend to drive good quality headphones very well and you tend to get the full benefit out of them. 2. Hi Fi fanatics (like myself) use portable...

Quote: Originally Posted by david1978jp Beside "Best", "PICASSO" and "Perfect". Can you tell me which "Class A" amp is? About hiss, do you have a list of non-hiss earphones/headphones? Thank you. If your are really serious on the hiss matter, I Can answer you by very simple...

I Have a evaluate sample of STUDIO. I have contacted with Hisoundaudio on the chip. They confirm it is the Sigmatel 3770 chip. Further Hisoundaudio explained that they only use the chip as the data management. They select the most reliable chip. Hisoundaudio explained the decent sound quality...