Cooler Master MH670 Wireless Gaming Headset Review: Great Sound Dogged by a Fatal Flaw

There’s a specific moment every gamer knows well. You’re deep in a competitive match, the tension is palpable, you lean back in your chair to celebrate a victory or stand up in frustration, and suddenly your head is yanked back by the unforgiving tether of your headset cable. It’s a jarring, immersion-shattering experience that sends you scrambling for a wireless solution. The search then begins for the holy grail: a headset that offers lag-free wireless audio, immersive sound that gives you a competitive edge, a crystal-clear mic for team comms, and marathon-level comfort, all without demanding a king’s ransom. This is precisely the promise that Cooler Master makes with its MH670. It aims to be the all-in-one solution that frees you from your desk, but as we discovered, cutting the cord sometimes comes with unforeseen strings attached.

What to Consider Before Buying a Wireless Gaming Headset

A wireless gaming headset is more than just an item; it’s a key solution for immersion, communication, and freedom of movement. It untangles you from your setup, allowing for more natural motion and a cleaner desk space. The primary benefit lies in its ability to deliver high-fidelity, low-latency audio without the physical restriction of a cable, which is crucial for both competitive and casual gamers. It enhances spatial awareness in-game, allows for clear coordination with teammates, and doubles as a great pair of headphones for music or movies, making it a versatile piece of your tech arsenal.

The ideal customer for this type of product is a PC or console gamer who values a clean, cable-free setup and plays a variety of games that benefit from directional audio. They likely spend multiple hours in their chair and prioritize comfort just as much as sound quality. However, a wireless headset might not be suitable for those on a very tight budget, as a comparable wired headset will almost always be cheaper. Similarly, professional esports athletes might still prefer the zero-latency, failsafe connection of a wired device, and pure audiophiles might opt for studio-grade headphones that prioritize music reproduction over gaming-centric features like a boom mic and virtual surround sound.

Before investing, consider these crucial points in detail:

• Connectivity & Compatibility: A great wireless headset should offer more than just one way to connect. Look for a stable 2.4GHz wireless connection via a USB dongle for low-latency gaming. Bonus points for including a 3.5mm jack for universal compatibility with devices like the Xbox controller or your smartphone, and modern USB-C support is a huge plus for future-proofing.
• Audio Performance: The heart of any headset is its drivers. Generally, larger drivers (like 50mm) can produce a richer, more powerful sound with better bass. Pay attention to the frequency response range (20Hz-20,000Hz is standard) and features like virtual 7.1 surround sound, which can significantly enhance positional audio cues in supported PC games.
• Materials & Durability: This is arguably one of the most critical, yet often overlooked, factors. Headsets can be made from a combination of plastic and metal. While all-plastic designs are lightweight, they are prone to cracking, especially at stress points like the headband adjustment and earcup swivels. A steel or aluminum-reinforced headband provides far greater long-term durability, even if it adds a little weight.
• Comfort & Ergonomics: For long gaming sessions, comfort is non-negotiable. Look for plush, breathable earpads (memory foam with leatherette or fabric covers), a well-padded headband, and a reasonable clamping force that secures the headset without causing pressure headaches. The overall weight is also a key factor; anything under 350 grams is generally considered comfortable for extended use.

Keeping these factors in mind, the Cooler Master MH670 Wireless Gaming Headset stands out in several areas, particularly with its versatile connectivity and audio specifications. You can explore its detailed specifications here to see how it stacks up on paper.

While the Cooler Master MH670 Wireless Gaming Headset is an excellent choice, it’s always wise to see how it stacks up against the competition. For a broader look at all the top models, we highly recommend checking out our complete, in-depth guide:

First Impressions: Understated Style and a Promise of Quality

Unboxing the Cooler Master MH670 Wireless Gaming Headset is a refreshingly straightforward affair. Cooler Master eschews flashy gamer aesthetics for a minimalist, all-black design that wouldn’t look out of place in an office. The hexagonal Cooler Master logo is subtly printed on the earcups, but there’s no RGB lighting to be found, a decision we appreciate. Inside the box, you get the headset itself, a detachable omnidirectional boom microphone, a USB-A wireless dongle, a USB-A to USB-C adapter, a USB-A to Micro-USB charging cable (a slightly dated choice), a 3.5mm audio cable, and a surprisingly nice faux leather carrying pouch.

The initial feel in the hand is quite positive. The steel-reinforced headband has a reassuring sturdiness, and the plush padding on the underside feels premium. The earcups are large and deep, covered in a soft PU leatherette that promises good passive noise isolation. They swivel 90 degrees and fold inward, making the headset highly portable and easy to slip into the included pouch. At 346.5 grams, it has a bit of heft but feels balanced, not burdensome. On first impression, it presents itself as a serious contender, a well-built piece of kit ready for action.

Performance Deep Dive: A Headset at War with Itself

A product’s story is written over time, through hours of use and abuse. Our extended testing period with the Cooler Master MH670 Wireless Gaming Headset revealed a stark duality. It is a product that excels brilliantly in some areas while failing catastrophically in another. It’s a tale of premium sound and comfort being tragically let down by a single, fatal design flaw.

Audio Fidelity: The Immersive Soundscape

Let’s start with the highest praise: the audio performance of the Cooler Master MH670 Wireless Gaming Headset is genuinely fantastic for its price point. The 50mm neodymium drivers deliver a sound profile that is both powerful and surprisingly well-balanced. In games like Apex Legends and Call of Duty: Warzone, the audio separation is excellent. We could clearly distinguish the subtle rustle of an enemy reloading nearby from the distant thud of a grenade, and the directionality of footsteps was crisp and accurate, providing a tangible competitive advantage. The bass is punchy without being overwhelming, lending cinematic weight to explosions and cinematic scores in single-player adventures like Cyberpunk 2077.

On PC, enabling the Virtual 7.1 Surround Sound via the MasterPlus+ software adds another layer of spatial awareness. While virtual surround can sometimes sound artificial or cavernous, Cooler Master’s implementation is quite good, widening the soundstage effectively and making it easier to pinpoint threats from all directions. This feature alone makes it a compelling choice for PC-first gamers. For music and media consumption, the headset performs admirably. It offers a rich, full-bodied sound that makes listening to music an enjoyable experience, a feat not all gaming headsets can claim. Many users confirm this, with one noting that “the sound quality has remained impressive, even after a year of regular use. Whether it’s music, podcasts, or calls, the clarity and balance are great.” This is the MH670 at its absolute best.

Comfort and Design: Built for Marathons, Not for the Long Haul

The second area where the MH670 shines brightly is comfort. Cooler Master has nailed the ergonomics for long-duration use. The plush foam cushions on the earpads are incredibly soft and form a gentle but effective seal around the ears, providing excellent passive noise isolation. We wore this headset for 6-8 hour gaming sessions and experienced no significant ear fatigue or uncomfortable pressure points. The clamping force is perfectly calibrated—firm enough to keep the headset secure during quick head movements, but light enough to avoid the dreaded “head-in-a-vise” feeling. The PU leatherette material also helps enhance the bass response and feels premium to the touch. One user perfectly captured this sentiment, stating the “ear cushions and overall comfort also hold up well over time, making it easy to wear these for long periods without any discomfort.”

However, this is where our story takes a dark turn. While the headset feels comfortable, its long-term structural integrity is profoundly flawed. After several months of careful, everyday use—placing it on and taking it off, with no drops or misuse—we began to see the same issue reported by an alarming number of users. The plastic hinge mechanism that connects the earcup to the headband is the headset’s Achilles’ heel. It is made of thin plastic that is simply not strong enough to handle the rotational stress of normal use. We found countless reports and images from users showing the exact same failure point. As one user lamented, “after only 6 months of use, it broke… went to adjust the headset and then the right earpiece felt lose.” Another stated, “I’ve only had it for 6 months and the plastic between the headband and earpiece broke, making it unusable.” This isn’t an isolated incident; it’s a fundamental design flaw that turns an otherwise excellent headset into a ticking time bomb.

Connectivity, Mic, and Software: A Mixed Bag of Tricks

In terms of connectivity, the Cooler Master MH670 Wireless Gaming Headset is a versatile beast. The 2.4GHz wireless connection provided a stable, low-latency link to our PC and PlayStation 5 throughout our testing, with no noticeable lag or dropouts within a reasonable range (about 2-3 meters). The inclusion of a 3.5mm cable and USB adapter makes it universally compatible, a huge plus for those who game on multiple platforms. The detachable omnidirectional boom mic is another strong point. Our teammates in Discord reported our voice came through as clear, rich, and natural, with minimal background noise pickup. When you want to use them as regular headphones, you can simply remove the mic for a cleaner look.

Unfortunately, the experience is hampered by inconsistent software and hardware quirks. Several users reported that the Cooler Master MasterPlus+ software was difficult to access due to “monthly bandwidth limits” on the download page—an inexcusable issue. When we did get it installed, we found the equalizer presets to be poor, and as one user noted, “it doesn’t allow you to see the residual battery,” relying instead on an audio cue when the battery is low. Furthermore, we encountered user reports of more severe technical problems, such as the microphone ceasing to work entirely or the headset refusing to power on unless plugged into a charger. One user detailed a frustrating experience: “After the first week… the microphone was stopped working once it was plugged into the headset. Windows detects it, but no sound input.” These software and hardware inconsistencies, combined with the catastrophic build quality flaw, tarnish an otherwise solid feature set. For those who value reliability, the potential for these frustrations is a serious consideration. You can see if recent buyer feedback mentions any improvements here.

What Other Users Are Saying

Sifting through user feedback on the Cooler Master MH670 Wireless Gaming Headset reveals a clear and consistent narrative that mirrors our own findings. The praise is almost always directed at the core performance features. Many users, like one who described the audio as “spectacular” and the microphone as “excellent,” were initially blown away by the sound quality and comfort, especially given the competitive price.

However, this initial satisfaction frequently gives way to profound disappointment. The most dominant theme across negative reviews is the catastrophic failure of the build quality. A user who owned them for almost a year stated, “they don’t get used often… picked them up today and they just crumbled apart.” Another shared a photo of their broken headset, saying, “I’ve only had it for 6 months and the plastic between the headband and earpiece broke.” This specific failure at the plastic hinge is mentioned repeatedly across different languages and regions, confirming it’s not a bad batch but a fundamental design flaw. Other complaints about the microphone failing, charging ports breaking, and software issues further reinforce the conclusion that while the headset sounds great when it works, its longevity is highly questionable.

Head-to-Head: Cooler Master MH670 vs. The Competition

No product exists in a vacuum. To truly gauge the value of the Cooler Master MH670 Wireless Gaming Headset, we must compare it against its key rivals in the same price bracket, each offering a different set of priorities.

1. SteelSeries Arctis 1 Wireless Gaming Headset

The SteelSeries Arctis 1 Wireless is a direct competitor that often prioritizes reliability and convenience. It uses the same award-winning speaker drivers as the more expensive Arctis 7, ensuring high-quality audio. Its main advantage is the ultra-low latency USB-C dongle, making it incredibly versatile for PC, PS5, Nintendo Switch, and Android devices. While it also features a steel-reinforced headband for durability—a direct counter to the MH670’s biggest weakness—some may find its ear cushions less plush than the Cooler Master’s. For a gamer who values robust build quality and seamless cross-platform compatibility above all, the Arctis 1 Wireless is arguably the safer and more reliable choice.

2. Razer Kraken V3 X Gaming Headset

The Razer Kraken V3 X enters the ring as a wired alternative that focuses on fundamentals and brand flair. It’s significantly lighter than the MH670, which may appeal to users sensitive to headset weight. It also offers 7.1 surround sound and Razer’s signature Chroma RGB lighting for those who love to customize their setup’s aesthetic. However, being wired, it lacks the freedom of the MH670. Its 40mm drivers are also smaller than the MH670’s 50mm units. This headset is best for a gamer on a tighter budget who is loyal to the Razer ecosystem and prefers the guaranteed stability of a wired connection over wireless convenience.

3. HyperX Cloud Stinger S Gaming Headset

The HyperX Cloud Stinger S is another formidable wired opponent, known for delivering on HyperX’s legendary reputation for comfort and solid build quality. It features 90-degree rotating earcups, similar to the MH670, and durable steel sliders in the headband. It also offers its own virtual 7.1 surround sound via a USB audio control box. While its microphone uses a convenient swivel-to-mute function, it’s not detachable. The Cloud Stinger S is the ideal choice for a user who was drawn to the MH670’s comfort and sound profile but was rightly scared off by the durability concerns. It offers a similar level of comfort and audio performance in a more robust, reliable wired package.

Final Verdict: A Heartbreakingly Flawed Contender

The Cooler Master MH670 Wireless Gaming Headset is one of the more frustrating products we’ve reviewed in a long time. It gets so much right. The sound is rich, immersive, and fantastic for both gaming and music. The comfort is top-tier, allowing for hours of use without fatigue. The cross-platform connectivity is a huge bonus. On paper and during the initial weeks of use, it feels like an absolute bargain that punches well above its weight class.

Unfortunately, all of that excellence is built on a foundation of sand. The widespread, well-documented failure of the plastic hinge is not a minor issue; it is a critical design flaw that renders the headset unusable. The additional reports of software bugs and hardware failures only add to the concern. For these reasons, despite its phenomenal audio and comfort, we cannot recommend the Cooler Master MH670 Wireless Gaming Headset. The risk of it breaking through normal, careful use is simply too high. It’s a classic case of great potential squandered by a fatal flaw.

If you’ve read our review, understand the significant risks involved, and still feel the audio performance is worth the gamble, you can check its current price and purchase it here.