The Sennheiser HMD 300 X3K1 is a professional broadcast headset with a dual-sided closed-back design and a dynamic supercardioid boom microphone, terminated with the Sennheiser X3K1 cable (6.3 mm stereo jack for headphones and XLR-3M for the microphone). It is aimed at sports commentary, OB trucks, studio production and broadcast operators who need isolation from loud backgrounds.
Key Features
Dual-sided closed-back broadcast headset
Dynamic supercardioid boom microphone
ActiveGard limiter protection for the listener
X3K1 cable with 6.3 mm jack and XLR-3M
Headphone impedance 64 ohms
High ambient noise rejection
Replaceable cable and earpads
Specifications
| Model | HMD 300 X3K1 |
| Sennheiser article | 700317 |
| Microphone | Dynamic supercardioid |
| Headphone impedance | 64 ohms |
| Cable | X3K1: 6.3 mm jack + XLR-3M |
| Form factor | Dual-sided closed back |





