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 and their bulky size 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 smaller. 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 block environmental noise comprehensively. 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 mediocre for office use. Their velour ear pads 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 don't effectively block out 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, both with in-line remotes. You get ample boom in the bass and clear midrange that helps you hear soundtracks, sound effects, and voices well, although this tuning is bright at the top end. However, you can't EQ them to your tastes because they're passive only, and people who wear glasses or who have smaller heads may experience a drop off in the bass response. On the plus side, the comfortable fit allows 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, though a slightly loose group delay in the bass can make kick drums sound a bit flabby. 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 has a great recording quality that captures your voice accurately and with plenty of body. It also does a good job of separating your voice from any noise around you.
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 Jul 29, 2025:
We've updated the Sound Profile box with a link to a downloadable folder of EQ settings that will help you match these headphones' frequency response to different target curves available in our Graph Tool.
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Updated Apr 25, 2025:
This review has been updated to Test Bench 2.0, which adds the following tests: Stereo Mismatch, Group Delay, Cumulative Spectral Decay, PRTF, Harmonic Distortion, and Electrical Aspects. We've added new performance usages and updated the text throughout the Sound tests and side-by-sides.
- Updated Apr 25, 2025: We've converted this review to Test Bench 2.1, which features minor updates to our sound tests.
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Updated Oct 30, 2024:
The following test groups have been updated after Test Bench 1.8: Sound Profile, Raw Frequency Response, Bass Profile: Target Compliance, Mid-Range Profile: Target Compliance, Treble Profile: Target Compliance, and Peaks/Dips. Text changes have also been made throughout the review to match these results.
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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 forums.
Popular Headphones 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 fence between gaming and audio enthusiast headphones, with a permanently attached mic.
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 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 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 to adjust the EQ and do updates. The Beyerdynamic can only connect via analog without any additional software. Despite being closed-backed, they don't block a lot of noise. They are more effective at isolation than the semi-open Astro, so if you're sharing your gaming space, the Beyerdynamic may be a bit better. Both headphones are closed-backs, but the Astro's design allows sound to interact with your environment which can make their soundstage feel more immersive and open.
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 that spikes in the highs. They have velour ear pads, 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.
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