Early Verdict
The Marshall Monitor III ANC headphones have so far honored the brand’s music heritage by putting on a great performance, boasting a rugged design that could seemingly survive the rowdiest mosh pit, and a battery that can rock all night and day (for several days in a row).
Pros
- +
Great sound
- +
70-hour battery life
- +
Comfortable design
Cons
- -
Not cheap
- -
Don’t love their look
- -
No 3.5mm Aux port
Why you can trust TechRadar We spend hours testing every product or service we review, so you can be sure you’re buying the best. Find out more about how we test.
For the past week I’ve been trying out the new Marshall Monitor III ANC over ear headphones. The new cans are available to buy right now in the US and UK for $349 / £299, which makes them a little pricier than their predecessors which were $30 / £30 cheaper. Even with the price rise they’re an excellent follow-up to 2020’s Monitor II ANC headphones – which we gave four stars in our review – thanks to great-sounding audio and a stupendously long battery-life.
Starting on that last point, these new Marshall headphones can go for a ridiculously long time; we’re talking a 70 hour battery life when using them to play music over Bluetooth with ANC on, 100 hours with it off.
For comparison, the Sony WH-1000XM5 headphones promise only 30 hours with ANC on, and the Apple AirPods Max just 20 hours. The Cambridge Audio Melomania P100 that features in our best noise-cancelling headphones guide as the ideal long-life option hits 60 hours. Marshall’s 70-hour claim looks to hold up too; I’ve been using the Monitor III ANC headphones a lot and haven’t needed to charge them since I did straight after unboxing them – though when I do my full review I plan to properly test how long these cans can last.
But what good is lasting a long time if they don’t put on a performance? Thankfully the Marshall Monitor III ANC headphones certainly hold their own here.
The drivers give drum and bass hits like Backbone from Chase & Status and Stormzy the oomph its thumping tones necessitate, while not overpowering tracks like Remi Wolf’s Cinderella that are brimming with bouncy funk. There’s a warmth in the Marshall Monitor III’s audio too – which comes through splendidly in more emotional tracks like Jarki Monno’s Charlie.
Outside of music, these cans perform well too. Podcasts, film, TV, YouTube videos, you name it – the Marshall III ANC headphones are putting on a good show.
That said, if you do want to tweak the EQ settings, you can change them to better suit your musical needs, though I’ve found the default 'original Marshall sound' setting is really well balanced and ideal for a lot of different listening experiences.
The soundstage has also had a tune up. Marshall’s previous Monitors had a somewhat restrictive stage. They didn’t feel completely closed off, but trackers were not always given the space they needed to breathe. Out of the box the Monitor IIIs might look like they repeat this error, but with the official app you can now open up that soundstage to suit your likings.
There’s a noticeable change with this Adaptive Soundstage feature switch on, so make sure you turn it on as soon as you can. Songs feel more spacious, and it makes the Monitor III ANC headphones solid picks for watching your favorite films or shows.
Not my style – but a fantastic design
Design-wise the Monitor IIIs admittedly aren’t my preferred style. There is something to love about the undoubtable Marshall look – with the same finish as the iconic amps, the logo on each ear cup, and a kind of classic grunginess that makes these look almost like they’ve been ripped from a rock band’s studio session from decades ago. It’s just not for me.
That’s subjective though; the objective design features of these ’phones are undoubtedly positive.
I love the physical knob for the volume and playback controls – give me one of these over tap controls any day. There are also two dedicated buttons, one on each side, that manage the active noise cancellation controls (with you being able to set which modes it swaps between in the app), and a customizable M Button (which can do whatever you set it to do, again in the app).
There’s also a USB-C port on the underside of the left cup, however, you won’t find a 3.5mm aux port.
Beyond the button layout, these cans are designed to be thrown in a bag and taken on adventure. Their headband can survive fairly extreme bending and twisting without snapping, and the outer shell can take a fair few knocks. They also fold up very tight and fit into what I’ve been told is the smallest case for over ear headphones on the market – inside its lined with a red velvety material to mimic the inside of guitar cases. It’s also one of those proper protective cases that zips up, not an awkward shell that some headphones rely on nowadays.
Oh, and don’t let me forget comfort. These things are so easy to wear thanks to the super-spongy cushions; I’ve had no issue wearing them practically all-day.
Don’t forget the app
To get the most out of these over-ear headphones you need the official Marshall app. It allows you to manage the Soundstage settings, the on-device button controls, the EQ so that music meets your exact specifications (though the default Marshall profile is very good), and a few other features.
It’s fairly standard as headphones apps go at this point, with a clean intuitive interface, and it was very easy to set up.
The only issue I’ve had with any feature is that the Auto Play/Pause tool was initially too sensitive – moving my head at all would cause the Monitor IIIs to pause tracks, not just when I removed them. However, a firmware update does appear to have resolved this issue and for the past few days I’ve been able to keep Auto Play/Pause on without it frustrating me – it can be turned off in the app.
Despite this minor (and seemingly now resolved) set back, the Marshall Monitor III ANC headphones have so far really impressed me. They have the comfort and battery life to keep me wearing them for days on end, and a vibrant sound that I’ll happily immerse myself in for all that time.
I need to conduct a few more tests, but so far I’d say they hold their own against the best wireless headphones, and their small size could make them a great contender to be the best travel headphones. So if you’re thinking of grabbing a new pair of cans this is looking like another model to add to your list of ones to consider.
You might also like
What is a hands on review?
Hands on reviews' are a journalist's first impressions of a piece of kit based on spending some time with it. It may be just a few moments, or a few hours. The important thing is we have been able to play with it ourselves and can give you some sense of what it's like to use, even if it's only an embryonic view. For more information, see TechRadar's Reviews Guarantee.
