The DSHA-3F really does not have the power reserves to deliver the bass capabilities of the HEDDphone. Plus, I cannot find a clear/complete specification list for the 3F.
I have a 1 Watt hybrid amp [a heavily modded/upgraded Bada PH-12] that drives, I think, the HEDDphone's bass better, but not yet to to their full potential
Even the lowly [$290] SMSL SP200 THX AAA 888 does better than the 3F, bass-wise, while inferior--but not by much!--in other regards.
The T4 is not up to the task, either, IMHO--at least, for me, there was no "aha!" moment when I initially ran the HEDD briefly with the T4. But I may have to unbox it and do some more listening. I cannot find a clear specification list for the T4, either.
I have had notable success with the DSHA-3F and, of course, the Utopia, and also with the ADX5000 and the Empyrean; but the HEDDphone are not the 3F's forte.
Will be running the HEDDphone directly out of the speaker taps of my Dussun T6 integrated and reporting [Deo volente] sometime next week.