ok so this is kind of a conundrum. you have a very powerful amp. if you were to get a cable that plugs from your headphones into your speaker jacks you could run anything. for the hifimans i’d say definitely go for the he400se and get some big leather pads if you want tons of bass. you probably wont get great bass response off of that amp unless you’re using the speaker ports though. eventually the a30 pro would be great on power for them though. definitely get a balanced cable for them and definitely some new pads and i think you’ll be surprised by them.
I’ll say right now hard skip the 789. The a30pro is 10 times the amp that thing is. And if you get higher impedance headphones eventually like 250-600ohm range the a30 pro runs class a so it delivers full power at all times above 250ohm. As for your current dac I don’t think it’ll output dac signal so I unfortunately you’d need a dac. The new topping d10b should be all you’d need and its cheap-ish, measures well, super quiet noise floor, is balanced output so you’ll get the full volume out of your a30 pro and small. I’d skip buying a new dac after that until you’re ready to drop at least $500.
i think the money saved buying the he400se for $150, pads for lets say $40 max, and if you’re feeling like really clearing up some of that bass and getting everything you can get out of the headphones, some honeycomb grills for like $35 and be around $225 all in and stomp the sundara. sundaras aren’t going to do well unless they have more power than your current amp either also.
Worried that the Hifiman in this range don’t have the bass-forward tuning that you might be seeking.
It’s good for me, but… it’s not what they’re modern tuning seems to go for. EQ may be friend.
How do you feel about your 177x go’s?
i really like the 177x, but i dont know if the mx3 is to underpowered to really show its true colors, nooby to this stuff. but to be honest they are really all i have so to compare against any other is hard