This is real wisdom... And thanks for all the users that spend time and money reviewing tubes and modding the Amp :-)

You still need the gnd connected (shared) with the PC as USB signals need a reference.

Yes: http://hifiduino.wordpress.com/2011/08/01/musiland-monitor-03-us/

Anyone tried increasing the pad thickness?   Cut two doughnut shaped pieces out of an old mouse pad and put them between the pads of the headphone and my ears. There is marked improvement: more 3D....

Quote: I use a leather band I cut (a flexible belt would work too) and affixed it by replacing the screws that holds the cups to the band with longer screws. The band needs to be flexible enough to adjust well to the contour of your head  

Quote: To me, the biggest adjustment was "time in your head". Moving from hd580 to these headphones at first they didn't sound right. Now moving from the T50RP to the HD580, the HD580 doesn't sound right. By looking at the published response charts of the T50RP, they have a valley at 5...

New owner of the TP50. I am happy with the bass. Wish to only increase treble a bit.   I found this in Musician Friends website: "Tips: If anyone feels that T50RP has inadequate treble, just rise the cushions by 6mm thicker (actually for pop style sound I stick the DT880 cushion on it)...

I think I qualify: www.hifiduino.blogspot.com

Very nice project. What is the voltage headroom required to keep Q1 going? (the voltage headroom after R3) Also what are the simulations results?   Thanks

Hello Mr. feiao,   I must congratulate your company for producing quality products at low cost... At first I thought you were using the mux capability of the wm8805, but you are using the chip in hardware mode, so the 8804 will be equally good for your application.   May I suggest you...

I got one and took a peek inside (I have not listened it it yet :-)). I must say this is a steal at $30. The WM8805 is a top-end device for spdif receiver. Good engineering all throughout. Power is also very good with good filtering and a simple, yet low noise shunt zener regulator...

Being an exclusive access device and enforcing no oversampling, does this allow arbitrary native bitrate playback? In other words, if I have a 44.1K and 96K song in the library, would this allow the playback of the 44.1K song at 44.1K sample rate and the 96K song at 96K playback automatically...

If you are using Windows 7, it supports WASAPI exclusive. Unfortunately iTunes does not support WASAPI exclusive, (only shared mode). But you can try something like "musicbee" that supports exclusive mode to see if this is the problem.

Quote: Yes, you can run OPUS, Metro and SPDIF receiver out of a single LCDPS. One side powers the digital section of OPUS, Metro and SPDIF board, the other side of LCDPS powers the analog section of OPUS   I would recommend that you get the basic set up running first (SPDIF receiver...

Only works with 10.6.x and above? (Did not work on a 10.5.8 machine) Thanks