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Master & Dynamic MH40

Over-ear headphones with Apple® remote and microphone (Gunmetal/Black Leather)

3 Reviews

Item # 951MH40G1

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Our take on the Master & Dynamic MH40

I'd heard a lot about Master & Dynamic's MH40 over-ear headphones, so I was thrilled when they showed up at Crutchfield. The New York-based company has quickly developed a reputation for crafting rock-solid headphones with old-school looks and killer sound. And boy do they know presentation. Just pulling these headphones from their leather storage case felt like a big deal.

Retro-looking headphones that live up to their rep

I'd heard a lot about Master & Dynamic's MH40 over-ear headphones, so I was thrilled when they showed up at Crutchfield. The New York-based company has quickly developed a reputation for crafting rock-solid headphones with old-school looks and killer sound. And boy do they know presentation. Just pulling these headphones from their leather storage case felt like a big deal.

The MH40s feel both refined and rugged. High-quality leather lines the flexible metal headband. It's reinforced with steel headphone sliders. When I slipped these 'phones on — even without active noise cancellation — they fit firmly and blocked out office chatter and ruffling papers.

Incredibly clean, accurate sound

I tried the MH40 headphones on an unfortunate, mournful day for music fans — the day we lost David Bowie. Shocked at the news, I listened to his new album and a playlist of his legendary catalog. Perhaps the best compliment I can give the MH40s is that they stayed out of the way. On a day when I just wanted to hear Bowie, Masters & Dynamic made that happen, without flavoring.

His new song "Sue (Or in a Season of Crime)" stood out. The bass line and drums hit with authority, while cymbals shimmered and the horns sounded open. Vocals melted their way into the mix cleanly and beautifully. Even when all these sounds collapsed on one another to evoke chaos, I could pick out each distinct instrument through these 'phones — especially Bowie's sweet yet visceral pipes.

Well-built and softly padded

As cool as these heavy-duty metal 'phones feel in your hand, you may worry that they'd be tough to wear. Not true. Padding and proper weight distribution ensure a comfortable fit. Soft lambskin leather lines the memory foam earpads so that, while snug, the headphones never feel like they're clamping. And the sturdy construction is very much welcome. They simply don't slip around as you listen throughout the day. 

Take calls and control your iPhone®

A smaller, round leather case is packed inside the larger one. It holds two cloth-covered cables: a 2-meter listening cable and a shorter cable with a built-in remote for controlling Apple® devices. Play and pause music, skip forward and back, and adjust the volume. The built-in microphone also lets you take calls with your iPhone, or talk to friends and family on FaceTime.

Product Highlights:

  • closed-back, over-the-ear design to block out external noise
  • 45mm aluminum-covered drivers deliver clear, natural sound
  • lambskin leather ear pads filled with memory foam for long-lasting comfort and breathability
  • stainless steel earcup sliders and premium grain leather headband for durability
  • two cloth-covered detachable cables with miniplug connectors:
    • 47" cable with in-line remote and microphone for taking calls and controlling music on Apple devices
    • 79" oxygen-free copper listening cable
  • built-in microphone lets you make calls with your smartphone
    • omnidirectional design ensures calls are clear
  • 1/4" adapter plug included
  • metal on-ear mute button
  • earcups fold flat for easy storage
  • includes leather storage case and magnet-sealed cloth carrying case
  • impedance: 32 ohms
  • warranty: 2 year limited
  • Our 60-day money-back guarantee

What's in the Box:

  • Over-ear headphones (gunmetal / black leather)
  • 4' Audio cable with in-line microphone and 3-button remote (straight 3.5mm plug)
  • 6.5' Audio cable (straight 3.5mm plug)
  • Snap-on 3.5mm-to-6.3mm adapter
  • Leather cable box
  • Canvas headphone pouch
  • User Manual
  • Mission statement
  • Tips card

Overall I'm very satisfied with Master and Dynamic MH40 headphones. They sound very natural and accurate. Watch out for crappy recordings, you'll hear it!

Maxtheboxer, Miami, FL


Master & Dynamic MH40 Reviews

Average Customer Review(s):

(3 Reviews)
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Hands-on research

Features and Specs

Earcup Type Closed
Earcup Width x Height 2.509" x 3.662"
Noise-canceling No
Bluetooth No
Mic For Taking Calls Yes
iPhone Control Yes
Lightning Connector No
Android Control No
Frequency Response Not Given
Sensitivity Not Given
Impedance 32 Ohms
Weight 13 ounces
Cord Length 48" + 78"
1/4-inch Adapter Included Yes
Volume Control Yes
Parts Warranty 2 Years
Labor Warranty 2 Years

Product Research


Overview: The Master & Dynamic MH40 over-ear headphones are crafted of forged aluminum and stainless steel components, with heavy grain premium cowhide and soft lambskin on the headband and ear pads. The MH40s come with two straight cables, including one with an in-line Apple-compatible remote and microphone, plus a canvas pouch and leather cable box.

Drivers: The MH40s are equipped with 45mm neodymium drivers. These high-performance drivers, along with oxygen-free copper cables, deliver superb sound quality. The headphones are tuned to accommodate a diversity of musical tastes.

Ear Pads/Headband: The ear pads are made with memory foam, covered in soft lambskin for superior comfort and breathability. The ear pads are removable for cleaning or replacement, and attach to the ear cups with magnets. The headband features heavy grain premium cowhide on the outside and lambskin on the inside.

Supplied Cables: The MH40 headphones come with a 4' tangle-resistant woven cable with an in-line 3-button remote, and a 6.5' woven cable without remote. Both cables have a straight 3.5mm plug that's compatible with many smartphone cases. A snap-on 3.5mm-to-6.3mm (1/4") adapter is provided for use with home components. The in-line microphone is separate from the remote, and placed closer to your mouth for better vocal clarity and reduced noise. The remote and mic are compatible with Apple products: iPhone 3GS or later, iPad, and iPod touch (2nd generation or later). Remote functions for Apple include: Volume Up/Down, Play/Pause, Answer/Hang up call, Skip forward, Skip Backward, Fast forward, Fast reverse, and Voice Commands. The remote has limited functionality (play/pause) with Android devices.

Dual Audio Ports: The headphones have 3.5mm audio ports on both ear cups. This allows you to connect the headphone cable to either the left or right side. It also allows you to share your music by plugging another set of headphones into the unused headphone jack.

Mute Button: The MH50s are equipped with a mute button on the outside of the right ear cup. When the button is pressed in, the audio is muted. When the button is pressed, the button springs out, and the audio is un-muted.


  • Sound Profile: Dynamic, Closed
  • Impedance: 32Ω
  • Ear Cup Dimensions: Width: 2.509", Height: 3.662", Depth: 1.913"
  • Weight: 13 ounces

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

After extensive review and trying out multiples headphones from friends and at a few stores, I decided that this pair was the most well rounded of my choices: Excellent sound quality with impressive bass and beautiful highs and mids, along with an unmatched build quality at price that fit my budget. What more can I ask for? :D [ Luke William  May 09, 2016 ]