Hi guys, Just chiming in to start up this thread. I used search but did not find t1 owners thread, so I decided to make my own. So I'm really liking what I'm hearing out of debitsohn's T1 that I reterminated to balanced. I mainly tested his with Roc and Metal and the sound was great! Easily my best Metal phone. Below are some of my initial impressions of it. - The tonal balance is excellent and offers very lifelike timbre. - Midrange is fluid and extremely transparent with exceptional detail. - Treble is very extended and detailed without being harsh like other headphones can be. - Bass is just awesome. It reminds me so much of the DT990's bass, but has slightly less impact and goes much deeper. -The soundstage is but not HD800 massive. Kinda a little bit below the K701. -Transients are also very good and so is the decay of notes and other sounds. POWER REQUIREMENTS: The T1 does not need massive current, it needs voltage. Anything that can swing more then 20V max should be perfectly fine for the headphone. But going by that 20V rule, mostly all amps should drive the headphone effectively. Heck my little X-CANV8P can drive this bad boy extremely well. Stuff like the M-Stage should perform just fine for this headphone. So even the O2, and Magni would be fine for driving this. But these would be the minimum for amp's I'd use. The O2 swings 9V, which is a bit low to me, but should be adequate for getting good volume and control. Though I only have my stuff to compare too so my minimum voltage recommendation is probably not right.