Oh no! Well I guess that could also be a good thing . Do you think it's a massive upgrade in detail and do you still enjoy listening to the HD 600 or is it more a case of "I should just use the T90"?
I recognize you from the DT 770 Pro 32 ohm (anniversary) thread . If I might ask, how do you think the T90 compares to those?
If anyone who has tried both the T90 and T1 feels like talking about them (is the T1 worth an extra 300€ (~$350)?), that would be great!
The DT770 Anniversary is a great headphone, still use it a lot. But the clarity an detail of the T90 are better as well as the bass (with the right amp) can extend way lower and is more layered. I have both and listened to @punit T1 for two weeks when he generously lend them to me when he was traveling. The T90 was a revelation to me the T1 does everything a tad better. Soundstage is more open, and the highs are the most natural you can get - makes the T90 in comparison sound a bit unnatural/ artificial when you A/B them. I bought @punit DT770 anniversary, and his T90 over time, but he won't sell me his T1.
I am still terribly in love with my T90, so much so that I sold it to buy the Jubilee edition.
Is the T1 worth the extra money, YES. Is it worth the upgrade for you personally? Not so sure. A very subjective thing. I love the T1 but I am still hesitating to make the jump, can't explain why.
So my recommendation, work yourself up the ladder and when you reached your personal audio heaven - enjoy and stay there ;-)
@punit had all three headphones and I personally respect his opinion the most, maybe he jumps in here but I guess he will tell you the same he tells me: Get the T1, period.