Headphones · Closed-back · Dynamic
Sennheiser HD 300 PRO
All Sennheiser · MSRP $219
The HD 300 PRO is a wired, closed-back, circumaural dynamic headphone from Sennheiser's PRO range, aimed at studio, stage and broadcast monitoring. It has a replaceable cable, headband padding and earpads, and ships with a 3.5 mm cable and a 6.3 mm adapter.
Specifications
| Frequency response | 6 Hz – 25 kHz |
| Sensitivity | 108 dB SPL/V rms @ 1 kHz |
| Impedance | 64 Ω |
| THD | 0.1% |
| Dimensions (W × H × D) | 187 × 84 × 245 mm |
| Weight | 297 g |
As stated by the manufacturer — not community data.
Will it drive? · On paper
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 · 25 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 108 dB/V and 64 Ω — not a listening test. DAC/amps on the shelf →
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