Electronics · Studio / Open-Back Headphones
Do these headphones need a separate headphone amp?
Reviewer consensus
It depends on the model. Community threads note the higher-impedance Beyerdynamic DT 990 Pro (250 ohm) and the Sennheiser HD 650 benefit meaningfully from a dedicated amp, while the Philips SHP9600 was repeatedly described as wanting more power than a phone provides. The Sennheiser HD 505, HD 560S and the 30-ohm DT 1990 Pro MkII are described as easier to drive from modest sources.