Mine feels just warm to touch. I put one of those cooking thermometer on top of my Dave and it says 35 Degree C(room @ 24C). It never gets hot. That might be different when its in mid summer. From what I noticed burn in makes a bit difference. When I first got my Dave back in Jan. It was a little bit harsh and had more sibilance with my AKG K812. But now it has much less now. To me Dave improved quite a bit since its first week. I am past the 600hr mark. To me Dave sounds smoother, fuller sounding, less sibilance and better depth. It could be a factor of many things. I got a new Furutech Power Guard-48 (http://www.furutech.com/2015/09/16/11717/) same week I got my Dave in Japan. So cable could of been burn in also. Also I first had my Dave sitting on top of my Cavalli liquid glass. Now its sitting on two Ikea boards with 4 vibration feet in-between. I would like to try the stillpoints one day. I am very much liking Dave's neutral, details and depth. Compared to my old setup which is an Emm labs Dac2se and a Cavalli Liquid Glass. The EMM+LG combo is more smooth and warming sounding. The soundstage is about the same width but Dave wins in depth and transparency. Dave 's soundstage is amazing, It places instruments delicately in place even if they are soft sounds they aren't covered by other sounds. I find that the K812 sounds good with the Dave. K812 conveys Dave's soundstage, depth and transparency very well. It does have a little bit of treble sharpness. I tried with the hd800 and I never liked the U shape sound and hot treble. Dave paired with the Shure KSE1500 is one of the best I heard. When Robb Watts makes an electrostatic Amp for Dave's digital outputs, I'll be one to pre order. Dave's headphone out is enough to power all my headphones. My hardest to drive is my AKG k240df 600ohms. It can get loud enough for me at about -10 db. No problems driving my k812, lcd3, W3000anv. I'll ask my friend if I can try his k1000 sometime next week. I took my Dave to a local store so someone can try it. Last summer, I was debating on either the MSB analog, a totaldac, and Chord Dave since my emm labs is turning quite old. This person brought his Hugo TT to the store so I could try. After hearing the TT, I pre ordered the Dave. If the TT can already sound this good. I was never impressed with the Hugo. Last week, He tried my Dave and he really liked how it sounded. He was on the Dave for a long time and compared to his TT. He said he should of waited for Dave instead of getting the TT. But he also report a conflicting point. He feels that USB cable does make a difference. It could be his bias. He is a hardcore entreq fan. He has their ground box, USB cables, and other cables. He brought his entreq usb cable and I had my LH light speed 10G. He says he liked his entreq more. Sorry I don't have the details. We kept communications to basics since my Chinese isn't the best. I don't understand some of the more difficult terms he was using. Also searching up Dave I found this other Taiwan user review and he also found that USB makes a difference. http://www.hiendlife.com/x1/forum.php?mod=viewthread&tid=32457 . 2，USB线。农夫挑战者VS 日本AIM旗舰。农夫大气、AIM精细，各有特点。特别感受：Chord自带机线也算好听。He also states that he doesn't feel Dave was sensitive to Power cables. I honestly haven't had the time to play around with the USB and power cables to report anything. One thing I noticed is Dave USB with my iPad with CCK runs the battery much quicker then my old EMM labs Dac2. I was using my iPad to burn in the Dave before.