Beyerdynamic sensibly refreshes the MMX line with the Beyerdynamic MMX 300 (2nd Generation), gaming headphones aimed at the discerning audio enthusiast. These straightforward headphones boast a mic and in-line controls and come covered in ample padding for long sessions. For the gamer who wants their headphones to take on multiple roles, like listening to music and handling an online meeting while looking professional, these aluminum and light-contrast headphones look the part. Let's see if their simplicity and execution are enough to make them the right pick for you.
Our Verdict
The Beyerdynamic MMX 300 (2nd Generation) aren't designed for sports. Due to their large size and gooseneck mic, these gaming headphones aren't a practical choice for working out. Lots of movement exercises, like burpees, make them come loose and fall.
Comfortable.
- Unimpressive noise isolation.
- Not very stable.
- Not portable.
- Limited to wired-only connectivity.
The Beyerdynamic MMX 300 2nd Generation are inadequate for traveling because they're meant for gaming. They're large and don't collapse down to a smaller size. While they have a case, it'll take up most of the real estate in your bag. In addition, their passive-only isolation doesn't comprehensively block environmental noise. They feel comfortable to wear and have an in-line remote, but you'll definitely stick out in a crowd with the gooseneck mic.
Doesn't need a battery to work.
Comfortable.
- Unimpressive noise isolation.
- Not very stable.
- Not portable.
- Limited to wired-only connectivity.
The Beyerdynamic MMX 300 (2nd Generation) are fair for office use. Their velour earpads and adjustable headband padding feel comfortable, and the mic works well for meetings, but they can clamp down hard on some larger heads. They're also large and bulky, and they don't effectively block much environmental noise.
Doesn't need a battery to work.
Very good mic performance.
Comfortable.
- Unimpressive noise isolation.
- Not portable.
- Limited to wired-only connectivity.
You can't use the Beyerdynamic MMX 300 2nd Gen wirelessly.
The Beyerdynamic MMX 300 (2nd Generation) are good for wired gaming. They come with two cables for different connectivity needs, each with an in-line remote. You get ample boom in the bass and clear midrange that helps you hear soundtracks, sound effects, and voices well, though this tuning is bright at the top end. However, you can't EQ them to your tastes because they're only passive, and people who wear glasses or have smaller heads may experience a drop-off in the bass response. On the plus side, the comfortable fit lets you to adjust the headband for long sessions, and the mic captures your speech with very good accuracy and handles noise well enough that your voice remains understandable.
Very good mic performance.
- Great wired connectivity with controls.
Comfortable.
- Unimpressive noise isolation.
- Limited to wired-only connectivity.
The Beyerdynamic MMX 300 2nd Gen have decent audio reproduction accuracy with a generally balanced sound profile. Their mid-range is flat, so voices and instruments sound true-to-life, but they have a slightly boomy bass and an uncontrolled, bright treble that renders sounds like cymbals piercing. The left and right drivers are generally well-aligned in terms of phase and frequency, and there's no discernible coloration of your audio due to harmonic distortion, even at elevated listening levels. These are closed-back headphones, so they don't have an open-feeling passive soundstage, but their audio does interact with your outer ear, which can help with sound localization.
The Beyerdynamic MMX 300 (2nd Generation) have poor noise isolation. You'll hear everything from the low rumbles of a bus passing your window to a conversation nearby. They also leak a lot of noise, so people around you will hear your audio.
The Beyerdynamic MMX 300 (2nd Generation)'s mic delivers great recording quality, capturing your voice accurately and with plenty of body. It also does a good job of separating your voice from surrounding noise.
The Beyerdynamic MMX 300 (2nd Generation) have mediocre frequency response consistency, especially in the bass range. They're very sensitive to fit and placement: people with smaller heads or who wear glasses will likely experience reduced bass, while those with larger heads can experience more bass.
Performance Usages
Changelog
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Updated Oct 27, 2026:
We've added a mention of the Beyerdynamic MMX 330 PRO in the Popular Headphone Comparisons box.
- Updated Jun 23, 2026: This review has been updated to Test Bench 2.3, which removes the Virtual Soundstage, Base/Dock, and some comparisons from Bluetooth Connection. Have a look at our changelog for more info.
- Updated Apr 20, 2026: This review has been updated to Test Bench 2.2, which removes the Cumulative Spectral Decay (CSD) test, retiring its waterfall plot visualization from our reviews. You can read more about this change in the changelog.
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Updated Apr 14, 2026:
This review has been updated to Test Bench 2.1, which removes the Group Delay test and rebalances scoring for the Harmonic Distortion test and Audio Reproduction Accuracy performance usage. For more details, consult our full changelog.
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Differences Between Sizes And Variants
The Beyerdynamic MMX 300 (2nd Generation) headset comes in one variant, 'Black.' You can see the label for our unit. If you know of another variant, let us know in the comments.
Popular Headphone Comparisons
The Beyerdynamic MMX 300 (2nd Generation) represent an update to the first-gen Beyerdynamic MMX 300 by the audiophile manufacturer, and besides an extra cable included with the latest version, they're pretty similar. This line stands out as one of the few entries into gaming headphones geared at critical listeners, alongside the Audeze Maxwell. They're well-made and straddle the line between gaming and audio-enthusiast headphones, with a permanently attached mic. They also have an open-back variant, the Beyerdynamic MMX 330 PRO, which feature a very similar design and build, though they have a brighter sound profile, worse noise isolation, and leak a lot of audio.
For more options, check out the best gaming headsets, and if you don't need a mic, check out our best wired headphones and best audiophile headphones.
The Beyerdynamic DT 770 PRO and Beyerdynamic MMX 300 (2nd Generation) are both capable over-ears by the German manufacturer. The DT 770 PRO are aimed at analytical listeners and, depending on the variant, may need a headphone amp. They have a fairly neutral frequency response, with a spike in the highs. They have velour earpads, a wired-only connection, and passive isolation. Meanwhile, the MMX 300 (2nd Generation) differ most by including a non-removable microphone. They have additional in-line controls as well. Their tuning is similar, with slightly more low-end and a larger spike in the highs. They're bulkier with better headband padding.
The Astro A50 Gen 4 and Beyerdynamic MMX 300 (2nd Generation) are both comfortable gaming headphones equipped with good-sounding mics, but with different priorities. The Astro only works wirelessly with a base and software for EQ adjustments and updates. The Beyerdynamic can only connect via analog without any additional software. Despite being closed-back, they don't block much noise. They're more effective at isolation than the semi-open Astro, so if you're sharing your gaming space, the Beyerdynamic may be a bit better. The Astro's design allows sound to interact with your environment, which can make their soundstage feel more immersive and open.
The Beyerdynamic MMX 300 (2nd Generation) and Audeze Maxwell are both manufactured with audio enthusiasts in mind, with great-sounding mics and not particularly impressive noise isolation, but they have key differences. You can only use the Beyerdynamic wired, and their mic is permanently affixed. They feel more comfortable because they weigh less, given that they lack batteries, and use dynamic drivers. In contrast, the Audeze work wirelessly and wired, with a detachable mic.
The Beyerdynamic MMX 330 PRO are the open-back version of the Beyerdynamic MMX 300 (2nd Generation), and choosing between them will largely come down to which sound you prefer. The two models have a very similar design, similarly high build quality, and very comfortable fits. That said, the difference in enclosure means they reproduce audio very differently. The closed-back MMX 300 have much more low-end but also reproduce a sharper treble range, for a more excited (though potentially fatiguing) sound overall. Meanwhile, the open-back MMX 330 roll off a lot of low-end but have a more subdued treble response. While sound preference plays a big role in a buying decision, it's also worth noting that the MMX 330's open-back design leaks a lot of audio and struggles to provide any passive attenuation of your surroundings, so they're better suited to quiet environments.
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Test Results
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