Electronics · Audiophile Open-Back Headphones
Do audiophile open-back headphones need a separate amplifier?
Reviewer consensus
It depends on the model. Higher-impedance designs like the Beyerdynamic DT 990 PRO (250 ohm) and the Sennheiser HD 600/650 family are widely described by reviewers as benefiting from a dedicated amp to reach their potential. Lower-impedance, higher-sensitivity options like the Sennheiser HD 599 and HD 560S are far easier to drive from a phone, laptop, or basic dongle. HiFiMAN markets the HE600 as unusually easy to drive for a planar, though it still scales with better gear.