Field Test · Studio Gear Review
AKG K-240 Studio
In-depth technical review of AKG’s semi-open K-240 Studio headphones
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Spec Sheet
- Circumaural
- Semi-open
- Dynamic
- New XXL capsule
- Impedance: 55 Ohm
- Frequency response: 15 – 25,000 Hz
- Sensitivity: 104 dB/V
- Distortion factor < 0.3
- Rated power: 200 mW
- Automatic headband adjustment for perfect fit
- Cable routing on one side for easy handling
- Detachable cable with mini-XLR plug
- Cable length: 3m
- Gold-plated 3.5 mm stereo jack plug
- Weight with cable: 284 g
- Weight without cable: 229 g
- Includes 6.3 mm jack adapter
Studio Log
| Available since | March 2002 |
|---|---|
| Item number | 153257 |
| Sales Unit | 1 piece(s) |
| Design | Over-Ear |
| System | Semi Open |
| Impedance | 55 Ohms |
| Frequency range | 15 Hz – 25000 Hz |
| Adaptor | Yes |
| Replaceable Cable | Yes |
| Colour | Black |
| Sensitivity | 91 dB |
| Max. SPL | 88 dB |
| Type Of Connector | Jack |
| Adapter | Yes |
| Weight | 229 g |
| Replacable Cable | Yes |
| Marrone/Argento | Black |
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QC Pass — Field Test
Customer Review Summary
[META]Comprehensive review of the AKG K-240 Studio headphones covering sound quality, build, comfort, and studio suitability since 2002.Introduction to the AKG K-240 Studio
Since its release in March 2002, the AKG K-240 Studio has maintained a significant presence in affordable semi-open headphones tailored for studio use. Priced at approximately £58, these over-ear headphones feature a dynamic semi-open design with an impedance of 55 Ohms and frequency response ranging from 15 Hz to 25,000 Hz.
Build Quality and Design
The K-240 Studio headphones weigh 229 grams without the cable, making them lightweight enough for extended wear. They offer an automatic headband adjustment that provides a reliable yet gentle fit, adapting seamlessly to different head sizes. The headphones are finished in black with discreet gold plating on the 3.5 mm stereo jack plug.
The construction utilises predominantly plastic materials which, while not premium, offer adequate durability. Key practical features include a detachable cable with a mini-XLR plug and a 6.3 mm jack adapter, providing flexibility and ease of replacement, which is highly valued in a studio environment.
Comfort
- Large circumaural ear pads provide good ear coverage with a semi-open design that encourages airflow.
- Pads are soft but synthetic, which some users note may cause slight warmth or sweat during extended sessions.
- The headband and overall clamping force strike a balance between secure fit and wearer comfort, with many reporting minimal fatigue even after several hours.
Sound Performance
The AKG K-240 Studio aims for a relatively neutral and balanced sound signature, making it popular among audio professionals for monitoring and mixing. A notable characteristic is its semi-open design, which offers a natural and spacious soundstage while reducing pressure on the ears compared to closed-back models.
Frequency Response and Tonality
- Lows: Bass response is present but somewhat restrained, lacking deep punch and extension into sub-bass territories. This aspect aligns with traditional AKG transparency rather than emphasising warmth or exaggerated low frequencies.
- Mids: The midrange is clear and well-defined, allowing acoustic instruments and vocals to be distinctly heard, which is crucial in studio settings.
- Highs: Treble is smooth and crisp without harshness, though some users note a certain dip in extreme highs, which may affect the presence of subtle details.
Overall, the headphones deliver a detailed sound with an excellent stereo image and adequate dynamic range, suitable for tracking and rough mixing. They reveal layers in complex recordings, beneficial for discerning quiet background elements in tracks.
Maximum Sound Pressure Level and Sensitivity
The maximum SPL is rated at 88 dB, with a sensitivity of 91 dB, requiring an amplifier to reach high listening volumes efficiently. The 55 Ohm impedance encourages better control from studio-grade devices rather than low-power sources like smartphones.
Practical Usage
Thanks to the semi-open design, ambient noise can be heard while wearing the K-240 Studio, which may be useful during recording sessions where interaction with the external environment is necessary. The trade-off is some sound leakage, making these headphones less suited for noisy environments or situations requiring sound isolation.
Users praise the removable cable, as it is reinforced and easy to replace, significantly prolonging the product’s service life. The standard 3-metre cable length allows for flexible studio movement but may be cumbersome for mobile use.
Known Issues and Considerations
- Build quality, while robust, is susceptible to wear over prolonged intensive use, particularly in the cables and ear pads. Replacement pads and cables are available, which is a practical advantage.
- The synthetic ear cushions tend to harden after extended use, potentially reducing comfort but can be swapped for aftermarket velour pads.
- Some variations in batch quality and criticisms have arisen with the more recent models being manufactured in China, differing from original Austrian production in materials and finish.
- Sound profile can feel less exciting for bass-heavy genres such as pop or electronic music due to the restrained bass response.
Conclusion
The AKG K-240 Studio headphones present a compelling option for those seeking a reliable, affordable semi-open headphone primarily for studio monitoring and mixing tasks. Their transparent sound coupled with a comfortable, lightweight design means they can be worn for hours without significant fatigue. They excel in revealing midrange details and produce a spacious audio image suitable for critical listening environments.
While not perfect for bass-heavy musical styles or environments requiring total sound isolation, their build features, especially the detachable cable and the headband adjustment, make them resilient and adaptable. Given their price point, these headphones offer remarkable value and continue to be a standard recommendation among audio professionals and enthusiasts alike.
