beyerdynamic MMX 300 PRO
A closed, wired, handmade-in-Germany gaming headset with the STELLAR.45 studio driver, a cardioid condenser microphone, velour pads and replaceable parts.

Specifications
| Type | Closed, over-ear, wired |
|---|---|
| Driver | STELLAR.45 |
| Frequency Response | 5-40,000 Hz |
| Impedance | 48 ohms |
| Sound Pressure Level | 96 dB |
| Microphone | Cardioid condenser (back electret), 20-20,000 Hz |
| Weight | 314 g without cable |
| Earpads | Velours |
| Cable | 2x 3.5 mm stereo plugs plus console adapter |
| Compatibility | PC, PlayStation, Xbox, Nintendo Switch, smartphone |
| Made in | Germany |
| Warranty | Up to 2 years |
The beyerdynamic MMX 300 PRO is a gaming headset that is proud of not being a typical gaming headset. It is wired, the page mentions no lighting or software, and it borrows its driver from the company's studio headphones. beyerdynamic calls it the third generation of its famous gaming headset and pitches it as professional studio sound with gaming tuning, a high-quality condenser microphone, comfort for long sessions and parts you can replace. That is a distinctive shopping list in a market full of wireless dongles and RGB, and this page goes through what the specification says, what it leaves out and who is likely to love it.
The driver and the sound
The headset uses the STELLAR.45 driver, which beyerdynamic says is also used in its studio headphones. The company describes it as flexible and powerful at the same time and says the closed design lets you focus on the game. According to the product page, the tuning is meant to give balanced highs, mids and lows: atmospheric game music is emphasised in the depths, in-game sound localisation is accurate down to the smallest detail, and the highs were refined by beyerdynamic's acousticians so that music also sounds good outside gaming. The specification table lists a frequency response of 5 to 40,000 Hz, a nominal sound pressure level of 96 dB and a nominal impedance of 48 ohms. We have not measured the headset, so the sound descriptions are the manufacturer's. For a primer on what drivers and soundstage mean in gaming, see our explainer on headset drivers and soundstage.
Closed back, over the ear
The MMX 300 PRO is a closed, circumaural, over-ear design, meaning the pads go around your ears and the outer shell is sealed. beyerdynamic says this helps you concentrate on the game and hear teammates clearly. If you are unsure whether closed or open is right for your room, our guide to open-back versus closed-back headphones explains the difference. The ear pads are velour, which the company calls soft and breathable for long gaming sessions.
The microphone
The built-in microphone is a condenser type, specifically a back-electret capsule, with a cardioid polar pattern. The page gives a frequency range of 20 to 20,000 Hz for the microphone and says the highs and lows are balanced precisely. beyerdynamic says its many years of microphone expertise went into getting the most out of the capsule, so that every shot call is true to your voice. A cardioid pattern favours sound coming from in front of the capsule, which is why the microphone sits on a boom near your mouth. We would still recommend recording a short test before a tournament or important meeting, since no page can replace a listen.
Comfort and build
The headset weighs 314 grams without the cable. To improve wearing comfort beyerdynamic added a fontanelle recess and a snap-button closure on the head pad, features it says are also found on its studio headphones. The design language is more edgy than the previous generation, with precise edges. The headband has a spring steel core, and the company says the headset is built for years of use with high-quality materials and careful workmanship. It is assembled in Germany, and beyerdynamic says it has been known for audio products made in Germany for a century. The comparison page adds that the MMX 300 PRO is made in Germany while the wireless MMX 200 is made in China, which is one of the differences the company itself highlights.
Replaceable parts and long-term ownership
One of the four headline product features is that earpads, headband and cable are available as replacement parts, and the FAQ says beyerdynamic offers them for many years. That is a real advantage for a headset in this price range: pads wear out, cables get tugged, and a repairable headset can stay in use long after a sealed one would be discarded. The site lists a spare-parts section and a black headphone table stand at 59.99 dollars as an accessory. beyerdynamic also sells the MMX 300 PRO as B-stock, which may suit shoppers on a tighter budget, though we did not read the condition terms. The header of the store page mentions up to two years of warranty and 30-day returns, but check the exact terms in your region.
Connections: PC, consoles and phones
The headset is wired only. The cable ends in two 3.5 mm stereo jack plugs, and a 3.5 mm adapter for consoles comes with it. The product page says it works on PC, PlayStation, Xbox, Nintendo Switch and phones, and the FAQ confirms PS5, PS4, Xbox and Switch through 3.5 mm connectivity. For consoles the included Y adapter handles the connection, and beyerdynamic sells an optional 1.2-metre console cable if the adapter feels cumbersome. There is no remote or inline control. One thing the page does not say is whether a single-jack adapter for laptops is included. Many laptops have one combined headphone and microphone jack, so if you plan to use it with one, confirm the connection method before buying. The low-impedance driver is described as suitable for all these devices, which keeps the setup simple. Our headset buying guide discusses the trade-offs of wired and wireless designs.
How it differs from other beyerdynamic headsets
beyerdynamic answers two questions directly. Compared with the MMX 300 (2nd generation), the PRO gets a higher-quality headband suitable for professional products, less weight, a better fit over the top of the head, a studio-grade STELLAR.45 driver, improved microphone input and a more edgy look. Compared with the wireless MMX 200, the MMX 300 PRO has higher microphone and driver quality and a headband with a fontanelle recess. Those are the company's own comparisons.
Documents and support
The product page offers a specification sheet, a manual in eight languages (English, German, French, Spanish, Italian, Swedish, Japanese and Chinese), an EU declaration of conformity and a separate manual for Czech and Slovak. It also says the headset is sold directly from the manufacturer. Having a proper manual and a spec sheet available for download is a small detail, but it is a good sign in a product category where some makers publish little more than marketing copy.
Price and alternatives
beyerdynamic lists the MMX 300 PRO at 379.99 dollars, with free shipping from its store. That is more than many gaming headsets, so it makes sense only if sound quality, a proper microphone and repairability matter to you. If you prefer a wireless design with software, consider the SteelSeries Arctis Nova Pro Wireless, a multi-platform wireless headset, or the Razer BlackShark V2 Pro. For a more affordable wireless model, see the HyperX Cloud II Wireless.
The short version
The MMX 300 PRO is for people who want a plain, closed, wired headset with a studio driver, a real condenser microphone and parts that can be replaced. It is not for people who want wireless freedom, lighting or virtual surround. Confirm your connection method, budget accordingly, and it can be a headset you keep for years.


