Austrian Audio The Composer

The Composer is an open-back, over-ear headphone from Austrian Audio, made in Vienna. It uses a 49 mm dynamic driver with a diamond-like carbon coated diaphragm and ships with three detachable cables on a banana-jack connection.
| Frequency response | 5 Hz – 44 kHz |
| Sensitivity | 112 dB SPL/V |
| Impedance | 22 Ω |
| THD | 0.1% |
| Driver | 49 mm |
| Dimensions (W × H × D) | 215 × 200 × 90 mm |
| Weight | 385 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 | 0.79 V · 29 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 112 dB/V and 22 Ω — not a listening test. DAC/amps on the shelf →
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