On-ear headphones with Apple® remote and microphone (Sunset Orange)
Our take on the KEF M400 by Crutchfield's Jeff Miller
Sleek, lightweight headphones from the storied sound experts
We've long admired KEF from a distance. These British audio specialists have spent decades making great-sounding, cool-looking speakers. So when we started carrying them, and I got my hands on a pair of their M400 on-ear headphones, it was kind of a big deal.
Once I tried them out, I immediately understood how KEF earned their sound reputation. These headphones — designed by Studio F.A. Porsche in Austria — feel really well-made. They are smooth yet extra-solid, both in terms of build and style.
The KEF M400 on-ear headphones sit a little further back on your head, helping create a tight audio seal and form-fitting look.
Comfortable and secure, with a unique fit
I sort of had to learn how to wear these headphones. Their firm aluminum headband didn't quite fit like most, resting a bit to the back of my head rather than at the center of my crown. But I only had to adjust the free-wheeling earcups a little to find the sweet spot of comfort. I quickly got used to them, and appreciated how well they stayed put — never moving around, even when I shook my head to test them.
At a glance, the earpads don't seem any more cushioned than your average on-ear headphone — but boy, are they. Extra-soft memory foam is wreathed by plush, perforated leather that protects your ear for a tension-free fit. The leather-lined headband never felt like it was clamping, even though it fit snugly to prevent sound from escaping. I think it's because the M400s sit a little further back.
Dynamic sound with deep, detailed bass
Spotify® recently started serving up something called Release Radar, a weekly, personalized playlist of new songs from your “saved artists” list. It's a good way for me to test headphones because it usually features different-paced songs that span all genres. From stripped-down acoustic recordings to (frankly) over-produced studio tracks, the M400s made sure everything sounded it's best.
Schoolboy Q's hypnotic “THat Part Remix” proved the M400s were capable of reproducing bass that's both hard-hitting and nuanced. Next, a more upbeat, guitar-driven David Bowie live recording opened the soundstage up to show off the headphones' realistic sense of space. Considering how compact these headphones are, it was a bit surprising how spread out everything sounded.
- closed-back, tightly-sealed on-ear design blocks out external noise
- 40mm dynamic drivers deliver detailed sound with powerful, nuanced bass
- sturdy, precision-machined aluminum frame keeps headphones from moving around
- leather covered headband
- fluid, ball-jointed ear cups move to fit the shape of your ear
- perforated leather earpads filled with memory foam for comfort and breathability
- portable folding design
- detachable 51-inch cable with miniplug connector
- in-line remote and microphone for taking calls and controlling playback and volume on your iPhone®
- airplane adapter plug included
- zippered storage case
- designed by Studio F.A. Porsche
- frequency response: 20-20,000 Hz
- sensitivity: 101.5 dB
- impedance: 32 ohms
- weight: 6.2 ounces
- warranty: 1 year
- Our 60-day money-back guarantee
What's in the Box:
- On-ear headphones (Sunset Orange)
- 54" Audio cable with in-line remote/mic (3.5mm plug)
- Airline adapter
- Quick Start Guide
- Important Safety & Warranty Information
Features and Specs
|Earcup Width x Height||2.087" x 2.792"|
|Mic For Taking Calls||Yes|
|Frequency Response||20-20k Hz|
|1/4-inch Adapter Included||No|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
Overview: The KEF M400 Hi-Fi Headphones feature innovative design, precision engineering, and state-of-the-art technology to deliver high-resolution sound and hours of comfortable listening. These on-ear headphones have a precision-machined cast aluminum frame to give them a lightweight but solid feel. The ear cups are hinged to fold in for storage in the supplied soft cloth pouch. The M400s come with a 54" straight cable with in-line remote/mic and an airline adapter.
Drivers: The M400s feature full-range 40mm dynamic neodymium drivers with copper-clad aluminum wire (CCAW) voice coils for delivering the KEF signature sound.
Ear Cups: The ear cups are equipped with high density memory foam pads, which are covered with soft, sweat-resistant protein leather. The "race-track" design of the ear pads follow the shape of your ear and form an acoustic seal which shuts out external distractions by -20dB , and prevents sound leakage. The aluminum frame and soft ear pads ensure your comfort for hours of listening.
In-line Remote/Microphone: The M400s feature a 3-button remote and microphone for control of your phone calls and music playback. The remote is "Made for iPod iPhone iPad"-certified, and controls playback, Siri, and volume for Apple iDevices. It only controls play/pause and skip forward functions when used with Android devices. The 54" cable has straight 3.5mm plugs on both ends to let you put the remote/mic at either end.
- Frequency Response: 20 Hz - 20 kHz
- Sensitivity: 101.5 dB (+/-4dB at 1 kHz)
- Impedance: 32 Ohms (+/-15%)
- Maximum Input Power: 30 mW
- Noise Attenuation: -20dB
- Weight: 6.7 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.
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