Austrian headphone maker AKG is owned by Harman International, best known in the Apple accessory world for its numerous well-designed Harman and JBL-branded speakers, as well as lines of premium and budget headphones. Relative to what’s come before, K391 NC is a decidedly mid-range model—considerably smaller and more affordable than the Harman Kardon-branded “NC” headphones, while both sexier and pricier than budget alternatives…
