What’s your budget? Violectric or Lake People amps might be what you’re looking for. Lake People is cheaper, but geared toward studio use. Violectric tends to be more refined, but plenty detailed. the v202 is $999 and should fit your needs. The Lake People g111 mk2 might also work, but could be...
I suspect your probably right about power overload, iPhones have limited power draw. L7 Labs already measured the Link2 Bal, seems to be a bit of a mixed bag. Great DR, but has a couple other issues. The W2 131 uses the same chip, but measures much better (especially at higher volumes). I’m not...
Tri x KAEI - TK-2
Could be worthy competitor to the xd-05 plus if it can avoid qc issues
EarMen TR-Amp
It’s not new, but I wouldn’t mind seeing some detailed measurements