Beyerdynamic DT 240 Pro (2017)

At 196 grams, they rest light on the head—deceptively compact, yet built to seal out the world.

Overview

Released on October 30, 2017, the Beyerdynamic DT 240 Pro emerged as a closed-back, circumaural headphone aimed squarely at professionals needing isolation in loud environments. Marketed as an affordable sealed option for mobile monitoring, it fits into Beyerdynamic’s lineage of studio-focused gear without mimicking the bulk of its larger siblings. Owners report it delivers studio quality in less-than-ideal conditions—ideal for on-site tracking, field editing, or quick mixing sessions where ambient noise can’t be controlled.

The 40mm dynamic drivers (with an effective diameter of 35mm) are tuned to emphasize the low end moderately, lending a warm and relaxed character that leans toward comfort over clinical precision. According to Stereophile, bass is extended and nicely emphasized, though not overly tight, while mids remain adequately open and treble stays smooth—avoiding harshness even during long listening stretches. This tonal balance makes it a pragmatic choice for engineers who need fatigue-free monitoring without diving into neutral territory.

Despite its compact form, the DT 240 Pro achieves high ambient noise isolation, a key selling point for location work. The circumaural design seals well around the ears, minimizing sound leakage—important when recording live takes nearby. The coiled cable stretches from 1.2 to 1.8 meters, offering flexibility without excess slack, and crucially, it’s detachable via a 2.5mm connector. That feature, confirmed by SoundGuys and World Bolding, means the cable can be replaced—a rarity at this price point and a nod to longevity.

Still, collectors note compromises. The earpad diameter is on the smaller side, which can press against the ears for those with larger lobes, and the cable has gained a reputation for being microphonic—transmitting handling noise up to the ears during movement. That, paired with reports of slightly muddy bass definition, suggests these aren’t analytical tools in the vein of higher-end Beyerdynamics, but rather practical, portable workhorses with forgiving tuning.

Specifications

Manufacturer	Beyerdynamic
Model	DT 240 Pro
Type	closed headphone for professional applications
Driver type	动圈式耳机
Driver size	40mm (effective diameter = 35mm)
Impedance	34 OHMS
Frequency Response	conflicting reports: 5 Hz – 35,000 Hz (soundhouse.co.jp) vs 20 Hz – 20,000 Hz (VSystem)
Sound pressure level (SPL)	98 dB
Maximum power handling	100 mW
Cable	Coiled cable (1.2 m – 1.8 m), detachable
Connector	3.5 mm stereo jack plug (6.3 mm adapter included)
Cable connector	2.5mm size
Weight (without cable)	196 g
Dimensions	8.5 x 7.9 x 2 inches
Ear coupling	Circumaural

Collectibility & Value

Originally priced at $99 according to multiple sources, though some (e.g., SoundGuys) report $69, the DT 240 Pro occasionally dropped to $89 on sale, positioning it firmly in the sub-$100 professional monitoring segment. By 2026, it appeared on lists like “Best Vintage Headphones: 10 Classic Models Tested in 2026” (Progressive Radio Network), suggesting a growing recognition among budget-conscious audiophiles and engineers. However, availability has tightened—Sweetwater notes the model is no longer carried, and current listings suggest it’s frequently sold through remaining stock or secondhand channels.

Resale value remains modest, reflective of its original price and niche appeal. The microphonic cable is the most commonly cited flaw, and while the detachable design allows for replacement, no official spare parts information is documented. Collectors seeking durable, easy-to-drive sealed headphones under $200 often include it in shortlists, but its status leans more toward functional vintage tool than coveted artifact.