Closer Examination, Build Quality and Comfort

I have to admit I really like the unassuming look of the Cooler Master MH751. It's a simple black-on-black headset completely devoid of RGB LEDs and similar obtrusive "gaming" details. Detach its microphone and you can definitely use it outside of your own four walls; nobody will look at you strangely. The build quality is pretty good. The ear cups are made out of rugged, sturdy "grainy" plastic. Connecting them is a sturdy steel frame, which is mostly hidden away by soft pleather that covers most of the headband.


The ear cups are affixed to a pair of joints that allow them to be smoothly rotated by 90° outward and about 30° inward. The joints feel robust, and the whole headset can be flexed by quite a bit without ever creating the impression that it could fall apart.


The height of the ear cups can easily be adjusted by sliding them along the metal frame. Although there are no markings on the frame that would make it easier to figure out if we adjusted the height on both sides equally, the sliding motion is at least "clicky", so you can count the clicks when adjusting each side. On the other hand, there's no need to be too obsessed with the weight distribution of this headset. The Cooler Master MH751 is exceptionally comfortable, actually more so than most other gaming headsets on the market. Thanks to that, I quickly stopped caring about adjusting the height of the ear cups equally because the MH751 never hurt my ears or head, even when I wore it for over 5 hours without taking a break.


There are many reasons for the MH751 being as comfortable as it is. Its flexible frame, swivelable ear cups, and carefully adjusted clamping force are certainly important, but let's not forget about the ear cushions as well. They're very, very soft and do a good job of surrounding the ears. Unfortunately, they aren't removable. It's not a big issue at all, although removable ear cushions would be a welcome addition for several reasons—they could potentially extend the lifespan of the headset and would let us experiment with different materials. For example, one could get a secondary, perhaps more breathable set of ear pads for gaming and music listening over those hot summer months. I usually don't care about replacing the ear pads on a mediocre pair of headphones, but the sound performance of the Cooler Master MH751 is definitely on a level where it would make sense to play around with different ear pads. More on that a bit later in the review.


The connector for the detachable microphone is on the left ear cup. The hole of the connector is shaped such that there's only one way to turn the microphone. This is a smart decision by Cooler Master because it gets rid of having to deal with users who think the microphone isn't working only because they aren't talking into the "correct" side of the head.


Once plugged in, the microphone can't be pivoted or temporarily removed from your face in some other way; if you want to, say, take a sip of your drink, you'll need to bend it up or down, away from your mouth. Luckily, the microphone arm bends easily. It also does a great job of staying put once you find a position you're happy with. The perforations on the head of the microphone quite obviously tell us which part of it we need to bring close to our mouths.


The left ear cup also contains a 3.5-mm port for the supplied audio cable. Because of the way the port and connector are designed, their connection is very snug, so there's no risk of accidentally disconnecting the audio cable. It's still possible to use aftermarket audio cables as long as the casing of their connector isn't too thick.


About 50 centimeters down the braided audio cable is a remote control with a small volume dial and microphone mute switch. Not much to say about it except that I'd prefer it a bit further up the cable, which would put it on my chest instead of somewhere around the waist. Depending on your sitting position, it could end up under the table, which makes it unnecessarily hard to reach. The remote control has no clothes clip.


The "main" audio cable terminates in a 3.5-mm 4-pole TRRS plug, which you'll use for console gamepads, mobile devices, laptops and other devices that come with a combined audio input and output. When connecting the Cooler Master MH751 to a desktop PC, the additionally supplied TRRS-to-dual-TRS adapter needs to be used as it splits the single TRRS plug into separate output and input plugs.