Overview

The AKG K371 is a closed-back over-ear studio headphone developed by AKG Acoustics, a Harman International subsidiary, and tuned specifically to the Harman target frequency response curve for neutral and accurate sound reproduction. Released in 2019 at $149, the K371 was designed as a professional monitoring tool that delivers exceptional frequency response accuracy at an accessible price point, directly competing with the Audio-Technica ATH-M50x and Beyerdynamic DT 770 Pro. It has quickly become a reference recommendation for those seeking a neutral closed-back headphone that accurately reveals mix balance and tonal issues.

Design & Build

The K371 features a clean, understated aesthetic with a matte black finish, an adjustable headband with moderate padding, and oval-shaped leatherette ear pads that swivel flat for compact storage. The build quality is mixed: the headband uses a plastic frame with metal reinforcement at the adjustment points, and the earcups are fully plastic, which keeps the weight to a very comfortable 255 grams but does not inspire the same confidence as the all-metal Beyerdynamic DT 770 Pro. The ear pads are memory foam with a protein leather covering that provides good passive isolation and reasonable comfort for extended sessions, though they become warm after two hours of continuous wear. The detachable cable connects via a mini XLR connector at the left earcup with a twist-lock mechanism that is secure and reliable, and a low-profile carrying pouch is included for basic transport protection.

Performance

The 50mm titanium-coated dynamic drivers deliver a remarkably neutral frequency response that closely follows the Harman target curve, providing excellent tonal balance with extended sub-bass, a flat and natural midrange, and smooth treble that avoids the harsh peaks common in closed-back headphones. Bass extension reaches to 5 Hz with a gentle shelf that adds warmth and impact without the bloat or boominess that plagues many closed-back designs, and the bass is well-controlled with good articulation that suits both monitoring and casual listening. The midrange is the K371’s strongest attribute, delivering natural vocal reproduction, accurate instrument timbre, and a balanced presence that makes mix decisions about level and EQ much more reliable than with colored alternatives. Soundstage width is average for a closed-back design, but the imaging is precise and the instrument separation is excellent, allowing for clear identification of individual elements in complex mixes.

Features

The K371 includes both a standard 3-meter straight cable and a detachable mini XLR connection that is more secure and durable than the 2.5mm locking connector used by Audio-Technica. The closed-back design provides effective passive noise isolation of approximately 25 dB, making these suitable for recording and monitoring in moderately noisy environments. The 32-ohm impedance and 114 dB SPL/V sensitivity make the K371 exceptionally easy to drive from any source, including laptops, phones, and audio interfaces, without requiring additional amplification. The fold-flat design and included carrying pouch offer basic portability, though the plastic build does not feel rugged enough for heavy travel use.

Pros

• Exceptional frequency response accuracy that closely follows the Harman target curve, providing neutral, reliable monitoring that translates well to other playback systems and makes mix decisions more trustworthy than with colored headphones.

• Extended, well-controlled bass that reaches to 5 Hz with a gentle shelf that provides impact without bloat, offering better balance and articulation than the bass-heavy ATH-M50x or DT 770 Pro.

• Excellent midrange neutrality with natural vocal reproduction and accurate instrument timbre that rivals headphones costing significantly more, making the K371 an effective tool for critical mix evaluation.

• Very easy to drive from any source thanks to 32-ohm impedance and 114 dB SPL/V sensitivity, requiring no dedicated amplifier for satisfactory performance and volume.

Cons

• Build quality relies heavily on plastic components that feel less durable than the metal-reinforced Beyerdynamic DT 770 Pro or the exceptionally robust ATH-M50x, raising concerns about long-term reliability.

• The leatherette ear pads become warm and uncomfortable during extended sessions exceeding two hours, and the passive isolation is sufficient but not exceptional.

• The mini XLR connector is proprietary to AKG, limiting aftermarket cable options compared to the more common 2.5mm or MMCX connectors used by competitors.

• Soundstage width is limited as expected for a closed-back design, though the imaging precision partially compensates for the restricted spatial presentation.

Verdict

The AKG K371 is the most tonally accurate closed-back headphone available at its price point, delivering neutral frequency response that rivals studio reference headphones costing three times as much. The build quality is a genuine concern for high-use professional environments, and the ear pads become warm during long sessions, but for anyone who needs a neutral closed-back monitoring headphone for mixing, editing, or critical listening at $149, the K371 is the clear leader in its class.

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