Wow these phones have been quite a journey for me at first I liked them, using my Leckerton audio amp. Then I loved em, Bravo V3 (modded) but I still felt that the bass could be better. Then I rolled up some half sheet paper towels into drinking straw sized tubes with tape to keep them from...

Running mine with a leckerton audio uha760 really amazing. Update: I have this low cost bravo v3 tube amp and I threw it on these bad boys what a perfect match. So clear and smooth idk what to think.

Just got my HE-4xx’s running with Leckerton Audio UHA760 rocking out K7xx’s will probably be shelved 4 a lil while.