Sennheiser HMD 300 Broadcast Headset
The HMD 300 is a closed, circumaural headset built for high-volume backstage and broadcast environments, where an operator needs both isolation and speech that cuts through the noise. Its dynamic super-cardioid boom microphone can be positioned on either side of the headset, so it works for left- or right-handed operators without a different SKU.
Switchable ActiveGard limiting technology protects hearing from sudden peaks, and the closed, over-ear design keeps outside noise out of the operator's reference. It ships in three connector configurations for different intercom and beltpack interfaces: the standard HMD 300, the HMD 300 S, and the HMD 300 X3K1.
| Microphone | Dynamic super-cardioid, boom, side-configurable |
|---|---|
| Frequency Response, Headphone | 60 - 25,000 Hz |
| Frequency Response, Microphone | 40 - 18,000 Hz |
| Impedance | 64 Ω (headphone), 300 Ω (microphone) |
| Output Voltage | 0.5 mV/Pa (1 kHz) |
| Max. SPL, ActiveGard Off | 123 dB SPL |
| Wearing Style | Over-ear, closed |
| Weight | 320 g |






