Beyerdynamic DT 1990 PRO
The DT 1990 PRO MKII is an open-back, over-ear studio headphone designed for mixing, mastering, and editing, featuring the newly developed TESLA.45 driver with a 45 mm diameter and 30-ohm impedance. Manufactured in Germany, it includes two sets of interchangeable velour ear pads for different sound signatures, two detachable cables with mini-XLR connectors, and a hard case.
| Frequency response | 5 Hz – 40 kHz |
| Sensitivity | 94 dB/mW |
| Impedance | 30 Ω |
| Driver | 45 mm |
| Weight | 376 g |
As stated by the manufacturer — not community data.
A dongle is enough
A phone's own output runs out early; a small USB DAC/amp gives it full level and headroom.
| Needs, for 110 dB peaks | 1.1 V · 40 mW |
| Phone or laptop (≈0.70 V, 20 mW) | Runs short |
| Dongle DAC/amp (≈2.0 V, 120 mW) | Enough |
Worked out from the stated 94 dB/mW and 30 Ω — not a listening test. DAC/amps on the shelf →
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