Field Test · Studio Gear Review
AKG K-702
In-depth technical analysis of AKG’s open-back professional headphones
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Spec Sheet
- Flat-wire voice coil technology
- Varimotion two-layer diaphragm guarantees transient response
- Open
- Circumaural (full size)
- Dynamic
- Impedance: 62 Ohm
- Peak SPL: 105 dB
- Frequency range: 10 – 39800 Hz
- Max input power: 200 mW
- 3,5 mm Stereo jack connector
- Cable length: 3 m
- Weight with cable: 362 g
- Weight without cable: 300 g
- Includes: 6,3 mm jack adapter
Studio Log
| Available since | September 2008 |
|---|---|
| Item number | 217575 |
| Sales Unit | 1 piece(s) |
| Design | Over-Ear |
| System | Open |
| Impedance | 62 Ohms |
| Frequency range | 10 Hz – 39800 Hz |
| Adapter | Yes |
| Replacable Cable | Yes |
| Marrone/Argento | Black |
| Max. SPL | 105 dB |
| Sensitivity | 105 dB |
| Type Of Connector | Mini Jack |
| Adaptor | Yes |
| Weight | 300 g |
| Replaceable Cable | Yes |
| Colour | Black |
Demo Footage
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QC Pass — Field Test
Customer Review Summary
Introduction to the AKG K-702
Since their launch in 2008, the AKG K-702 headphones have established themselves as a reference open-back model for audiophiles and audio professionals. Priced around £155, these circumaural headphones position themselves as a detailed and accurate tool primarily aimed at mixing, mastering, and critical listening. With an impedance of 62 ohms and a flat-wire voice coil design implementing Varimotion two-layer diaphragms, the K-702 delivers an impressively wide frequency response from 10 Hz to nearly 40 kHz.
Build and Comfort
The AKG K-702 are relatively lightweight at 300 grams without cable, featuring an open-back, full-size design that allows for extended listening sessions. The ear pads maintain a sensible distance from the ears, utilising soft material that reduces heat build-up and does not cause discomfort during prolonged use. However, several users have reported the leather headband to feel somewhat firm initially, potentially causing pressure on the scalp, especially for those without much hair or with larger heads. Over time, the headband tends to soften, making the headphones more comfortable, but this adjustment period is worth considering.
Build quality leans heavily on plastic materials, which makes the headphones light but may raise durability concerns. The cable is detachable and available in a three-metre length with a mini-jack connection, including an adapter to 6.3 mm. The detachable feature allows for easy replacement or upgrading of the cable, although the standard cable is somewhat thin and prone to tangling. Overall, the construction is sturdy enough to withstand several years of careful use.
Sound Signature and Performance
The AKG K-702 headphones excel at producing a highly open and well-defined soundstage. The open-back system fosters an airy listening experience with a clear spatial separation of instruments. This is particularly beneficial for classical and acoustic music, where precise localisation and clarity are paramount.
The frequency response is characterised by:
- Treble and upper midrange: There is a noticeable presence peak between 2 kHz and 2.5 kHz, contributing to a bright and detailed upper spectrum. This can initially be perceived as somewhat sharp or fatiguing, especially on less refined recordings. However, as listeners acclimatise, this elevated detail enhances instrument separation and transient response substantially.
- Bass reproduction: The bass is deliberately restrained, echoing AKG’s typical sound approach. While the low end extends deep and remains tight and articulate, its reduced volume makes the K-702 less suitable for bass-heavy genres like rap or electronic dance music. Acoustic and jazz music benefit from this neutrality, as does symphonic material requiring accuracy over exaggerated low frequencies.
- Midrange clarity: The midrange presents a very natural reproduction of timbres. String instruments, such as violins and cellos, sound authentic and rich, with fine detail capture often unmatched by competing headphones in this price bracket.
- Soundstage and imaging: The headphones create an impressively wide and three-dimensional soundscape. Instrument localisation is precise, which makes the K-702 suitable for mixing tasks where spatial cues are vital.
One caveat with the sound profile is its high analytical nature. This exposes flaws in recordings and mixes, including audible artefacts and distortions. Consequently, using high-quality sources and amplification becomes critical for the K-702 to shine.
Amplification Requirements
Despite the relatively moderate impedance, the K-702 requires a powerful amplifier to perform at its best. Numerous users report that direct connection to smartphones, standard audio interfaces, or portable players results in underwhelming volume and a compressed soundstage. When paired with high-quality DACs and headphone amplifiers, the sound gains body and dynamics. Devices like Fireface 400 or dedicated tube amplifiers significantly enhance the listening experience, while entry-level equipment tends to highlight the headphones’ limitations.
Use Cases and Recommendations
The K-702 is best suited for:
- Mixing and mastering, especially on acoustic, classical, and jazz recordings where accuracy and spatial detail are essential.
- Critical listening for audiophiles who prefer an uncoloured and transparent sound signature.
- Home studios where an open-back headphone offers an immersive sound without excessive ear fatigue.
Its open design precludes its use in noisy environments or for tracking tasks where sound leakage into microphones would be problematic. Users seeking headphones for bass-heavy music or casual listening may find the K-702’s sound too neutral and bright. Furthermore, while the K-702 is comfortable for many, those wearing glasses or with sensitivity to headband pressure should be cautious.
Conclusion
The AKG K-702 remains a competitive choice for professional and dedicated audio listeners on a budget. Its exceptional soundstage, natural timbre reproduction, and precise imaging set a high standard for open-back headphones below £200. However, mastering its use involves pairing it with quality audio gear and recognising its analytical nature, which may reveal weaknesses in lower-quality recordings. While not without minor comfort and durability concerns, the K-702 delivers a performance that rivals much more expensive headphones, making it a sound investment for those prioritising detailed and spatially rich audio reproduction.
