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Black semi-open over-ear headphones with self-adjusting headband and detachable cable

AKG ACOUSTICS

AKG K240 MKII 55-Ohm Semi-Open Headphones

SKU CH-24HF-4519X

Semi-open over-ear headphones with 55-ohm impedance and 30 mm Varimotion transducers for studio monitoring and long-session comfort

  • Semi-open design delivers solid bass and airy highs
  • Patented 30 mm Varimotion transducer ensures accurate signal transfer
  • 55-ohm impedance works with low-output audio sources
  • Detachable OFC cable with gold-plated plugs simplifies service
  • Self-adjusting headband provides all-day comfort for long sessions

Professional Studio Headphones

The AKG K240 MKII semi-open headphones are built for studio monitoring and critical listening. Their 55-ohm impedance allows direct connection to low-output audio interfaces and portable devices without a dedicated amplifier. The around-the-ear design provides solid bass response and clear highs for accurate mixing decisions.

Detachable Cable Serviceability

A detachable oxygen-free copper cable with gold-plated plugs simplifies replacement if the lead is damaged. The self-adjusting headband and over-ear pads accommodate extended sessions without tools or complex disassembly. No driver matching or soldering is required, keeping downtime minimal for working engineers.

Semi-Open Acoustic Limits

The semi-open construction delivers an airy soundstage but leaks sound in both directions. It is unsuitable for tracking with open microphones or for use in noisy environments where isolation is required. Listeners needing complete containment or maximum low-frequency impact should consider a closed-back alternative.

Highlights

  • Semi-open design delivers solid bass and airy highs
  • Patented 30 mm Varimotion transducer ensures accurate signal transfer
  • 55-ohm impedance works with low-output audio sources
  • Detachable OFC cable with gold-plated plugs simplifies service
  • Self-adjusting headband provides all-day comfort for long sessions

Specifications

No published specifications for this item yet.

Questions about this item

How do I confirm the 55-ohm semi-open headphones are performing correctly after connecting them?

Listen for solid bass, accurate mids and crystal-clear highs across the frequency range; the self-adjusting headband should stay comfortable during extended sessions.

What comes in the box and what must I source separately?

The box includes the headphones with self-adjusting headband and a detachable OFC cable with gold-plated plugs; no additional cables or adapters are mentioned.

Which version should I choose for studio monitoring with low-output sources?

The 55-ohm impedance and improved sensitivity make this model suitable for direct connection to low-output audio interfaces without extra amplification.

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