Apogee APO-GROOVEUSB 4-Channel Portable USB Audio Interface

Its neat, can be used with adapter to ipads

Its great with my sennheiser overears, I still prefer my tesla on-ears straight into the jack of my ipad pro, though. But it can give you much more power especially with your great impedance phones. Beyerdynamics dt770 250 ohms works great with this.Read full review

Verified purchase:  Yes • Condition: pre-owned • Sold by: fleeble22