Beyerdynamic MMX 300 PRO 730670 Closed Gaming Headset accessory

Closed gaming headset with Stellar.45 driver

The Beyerdynamic MMX 300 PRO is a wired, circumaural headset built for competitive gaming on PC and consoles. It uses a low-impedance Stellar.45 driver also found in studio headphones to reproduce detail from 5 Hz to 40 kHz. A condenser microphone with a 20 Hz to 20 kHz response captures speech clearly. The closed design isolates the user from ambient noise.

Suited for players who want studio-grade audio

Gamers who value accurate positional cues and long-session comfort will benefit from the soft ear pads and recessed headband pad. The 48 ohm impedance allows direct connection to controllers and mobile devices without an external amplifier. Buyers who need wireless freedom or active noise cancellation should consider other models. The single 3.5 mm connector setup also limits use with separate mic and audio ports unless an adapter is added.

Consistent output during extended sessions

The Stellar.45 driver maintains low distortion, measuring under 0.05 percent THD at 500 Hz, so tonal balance remains stable even at high volumes. Passive isolation from the closed cups stays effective regardless of duration, unlike active systems that can introduce artefacts over time. The detachable 2.5 m cable reduces strain on the jack during movement. Microphone sensitivity of 21.6 mV/Pa delivers steady voice levels without gain riding.