What amps use the 4.4mm pentacon for balanced out?

both amps and DAC / Amp combo units. we can talk about desktop and portable.

to start…
IFi Zen series
iFi Hip DAC

FiiO q5s with AM3E module

Topping a50s

Topping dx7pro, topping A30pro,Topping A90, Sony…, newer sennheiser, shanling,iBasso,FiiO,new A&K etc etc.