Audio-Technica ATH-M40x Review – My 2-Year Experience

After long and exhausting auditions with brands like Sennheiser, Beyerdynamic, Sony, and Denon, I found myself drawn to the Audio-Technica M-series of closed-back monitoring headphones. The lineup ranged from the entry-level ATH-M20x (3,790 rubles) to the flagship ATH-M70x (20,500 rubles), which boasted an incredible 5–40,000 Hz frequency range. Of course, there was also the legendary ATH-M50x, now available in both wired and wireless versions.

Check Out: Audeze Maxwell Review

My final contenders were the ATH-M40x and the ATH-M50x. After a direct head-to-head session, the ATH-M40x won me over. Its sound felt more natural to me, while the M50x sounded a bit too sharp. Saving 3,000 rubles was just the icing on the cake.

Design and Build

The ATH-M40x follows the classic M-series look:

• Black-and-steel Audio-Technica logos on the earcups
• Soft leather earpads and a padded headband
• Rotating earcups with a folding hinge system for portability

The headphones fold with a satisfying click and fit neatly into the included leather carrying pouch. The detachable cable (a lifesaver if you have kids) is thick, durable, and uses gold-plated connectors.

Build quality is excellent—these headphones feel like they’re built to last.

Sound Quality

With Apple Devices

Since I first tested them for AppleInsider.ru, I paired the ATH-M40x with a 4th-gen iPod Shuffle, an iPhone 8, and a 2014 MacBook Pro.

• iPod Shuffle (4th gen)
  Despite its tiny size, the Shuffle impressed me. AC/DC tracks had punchy drums, tight bass, and clear guitars. Yes, the sound was a bit “muddy” and hissy in quiet passages, but the Shuffle’s sheer loudness was shocking. At full volume, distortion remained acceptable.
• iPhone 8
  Using the Lightning-to-3.5mm adapter (with built-in DAC), Apple Music streaming sounded decent, though compressed files lacked depth. Switching to FLAC files in VLC immediately improved clarity, detail, and loudness. It proved the iPhone was capable of serious sound—if given the right material.
• MacBook Pro (2014)
  The MacBook’s built-in DAC was more than good enough for the M40x. Playing FLAC files through VLC revealed excellent detail across the spectrum. Highs were crisp, bass was tight, and overall balance was outstanding. For everyday listening, this setup easily satisfied me.

With Hi-Fi System

At home, I use the Onkyo C-7030 CD player, Pro-Ject Debut Carbon turntable, and Denon PMA-720AE amplifier. With this system, the M40x truly shines.

The sound is neutral, precise, and honest. There’s no artificial bass boost or treble glare—just music as it was recorded. Some listeners might find this “boring,” but I appreciate the accuracy. Bad recordings sound bad, and good ones sound fantastic. That’s the mark of proper monitor headphones.

Comfort

Closed-back headphones always trap some heat, and the ATH-M40x is no exception. After about two hours, my ears need a break.

You may Like: Marshall Monitor III ANC Review

Clamping force is firm, which ensures a secure fit but can become fatiguing. The hinges, while useful, snap open too easily, and putting the headphones on with one hand is nearly impossible.

Durability

Here’s where the M40x shines. I’ve dropped them multiple times—no cracks, no scratches. The metal-reinforced headband and tough plastic earcups are built for abuse. The detachable cable and replaceable earpads also make maintenance simple.

Frankly, I wish Apple made AirPods cases from this kind of plastic—it never scratches.

Pros & Cons

Pros:

• Durable, professional build
• Neutral, accurate sound signature
• Reveals flaws in poor-quality recordings (a true monitor trait)
• Detachable, durable cable
• Affordable for the performance

Cons:

• Bulky and heavier than some competitors
• Firm clamping force can cause fatigue
• Hinges could use a locking mechanism

Final Verdict

After more than four years of use, the Audio-Technica ATH-M40x remains a solid choice for anyone seeking accurate, studio-like sound on a budget. They aren’t the lightest or most comfortable for marathon sessions, but their combination of durability, neutrality, and value is hard to beat.

If you want headphones that let you hear music as it was recorded—without artificial bass or treble—the M40x is a fantastic entry point.

Best Alternatives in 2025

If you’re comparing options:

• Audio-Technica ATH-M50x – More bass-heavy and popular, but less neutral.
• Beyerdynamic DT 770 Pro (80 Ω) – Larger soundstage, better for studio mixing, requires stronger amplification.
• Sony MDR-7506 – Classic alternative with slightly brighter treble.

Recommended for:

• Budget-conscious audiophiles
• Beginner studio producers
• Listeners who want accurate sound over boosted bass

Not ideal for:

• Long daily listening (comfort issues)
• Bassheads who want exaggerated low-end

Key Specifications of Audio-Technica ATH-M40x

Feature	Value

Driver size

40 mm dynamic

Frequency response

15 Hz – 24,000 Hz

Impedance

35 Ω

Sensitivity

98 dB SPL/mW

Weight

~240 g (without cable)

Cable

Detachable 3 m straight cable, 3.5 mm + 6.3 mm adapters

Design

Closed-back, over-ear, foldable hinges