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AKG K121 Semi-Open Headphones

Product Code AKK121
Manufacturer AKG

Buy this from the A.C. Audio Online Store. Request more information or contact us now for purchasing information.


The K121 MKII professional on-ear semi-open headphones are a cost-effective alternative to the K141 MK IIs for studio monitoring and playback. Designed for single-ear use, they deliver familiar sound and make intonation easy.

The K121 MKII headphones feature gimbal-suspended leatherette ear cups for easy cleaning. The self-adjusting headband makes them comfortable to wear and easy to use, even in long work sessions. The K121 MKII's come with a fixed, single-sided, straight cable.
On-ear, semi-open design
for solid bass and airy highs

Optimized for single-ear use
for familiar sound and easier intonation
Self-adjusting headband
maximum comfort for long work sessions



Headphone type semi-open
Audio Frequency bandwidth 18 to 22500 Hz
Sensitivity headphones 114 dB SPL/V
Rated Impedance 55 Ohms
Earpads -
Detachable cable no
Cable Length 3 m
Earpads Replaceable yes
Audio Interface
Type Screw-on Jack Combo (1/4" and 1/8")
Gender Male
Contacts 3-pin
Interface Finish Gold
Finish matte black
Dimensions / Weight
Length 23 mm
Width 11 mm
Height 22 mm
Net Weight 220 g

Equipment available to buy from this site is for professional use only. Please note in certain countries some products listed may not be available from A.C. Entertainment Technologies Ltd.

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