Got my T1 last night and another tube as well (I'm not at home so I don't recall.. I think an EECC88 or something like that...). Not sure how I feel about it honestly. I have been using my Auzen Forte --> FiiO E9 to drive my HE-400's. Maybe I got too used to the sound I was getting from that combo + EQ. The T1 + ASO EQ is good...but I didn't have a lot of time to tune it...I found it lacking. It still sounded good, but I don't know if I can say this was any kind of upgrade path yet. I will report back as I spend more time A|B-ing it all. I suppose I couldn't expect too much for the price but so far I can't say I'm overly impressed. I may need to enable a gain switch on the bottom as well..I need more volume on the T1 than E9 to reach good listening levels with my HE-400's. I haven't tried any other headphones yet.
I will say it looks nice on my desk...I do wish the power switch was on the top or front...that will limit where I can place it. I don't know what I think about the LED...that may be getting blocked soon if I keep this unit.
It's good, but I don't know if it'll give me what I seek. Just the T1 with no EQ is thin, weak and disappointing to my ears...changing bulbs doesn't have as big of an effect on sound as I had hoped. Maybe it's just because I was expecting something different? Maybe I'm too used to my EQ-ing? I don't know... but I will report back later once I have time to sit down and tune everything and spend more time with the hardware.