Beyerdynamic Amiron home

Wired, open-back, over-ear headphones using beyerdynamic's Tesla transducer technology and made in Germany. They have a 250 ohm nominal impedance, microvelours earpads and a detachable 3 m cable with a 3.5 mm plug and 6.35 mm adapter.
| Frequency response | 5 Hz – 40 kHz |
| Sensitivity | 102 dB/mW |
| Impedance | 250 Ω |
| Weight | 340 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 | 1.3 V · 6.3 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 102 dB/mW and 250 Ω — not a listening test. DAC/amps on the shelf →
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