Beyerdynamic DT 240 Pro (2017)
At 196 grams, they sit light on the head. They're compact, and they seal out the noise around you.
Overview
The Beyerdynamic DT 240 Pro came out on October 30, 2017. It's a closed-back, circumaural headphone aimed at professionals who need isolation in loud places. Beyerdynamic marketed it as an affordable sealed option for mobile monitoring. It fits the company's line of studio gear without the bulk of its larger siblings. Owners report it delivers studio quality in less-than-ideal conditions, such as on-site tracking, field editing, or quick mixing sessions where you can't control the ambient noise.
The 40mm dynamic drivers (with an effective diameter of 35mm) are tuned to emphasize the low end moderately. The sound is warm and relaxed, and it leans toward comfort over clinical precision. According to Stereophile, bass is extended and nicely emphasized, though not overly tight. The mids stay adequately open and the treble stays smooth, with no harshness even during long listening stretches. That makes it a practical choice for engineers who want fatigue-free monitoring and don't need neutral.
Despite its compact form, the DT 240 Pro achieves high ambient noise isolation, which is a key selling point for location work. The circumaural design seals well around the ears and keeps sound leakage down when recording live takes nearby. The coiled cable stretches from 1.2 to 1.8 meters. It's detachable via a 2.5mm connector, a feature confirmed by SoundGuys and World Bolding. That means the cable can be replaced, which is rare at this price point.
Collectors do note compromises. The earpad diameter is on the smaller side, and it can press against the ears of people with larger lobes. The cable has a reputation for being microphonic, so handling noise travels up to the ears when you move. Add reports of slightly muddy bass definition, and these aren't analytical tools like the higher-end Beyerdynamics. They're practical, portable workhorses with a 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
The original price was $99 according to multiple sources, though some (e.g., SoundGuys) report $69. The DT 240 Pro occasionally dropped to $89 on sale, which put 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). 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, in line with its original price and niche appeal. The microphonic cable is the most commonly cited flaw. The detachable design allows for replacement, but no official spare parts information is documented. Collectors seeking durable, easy-to-drive sealed headphones under $200 often include it in shortlists.
eBay Listings
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