Semi-open-air headphones that combine excellent sound quality with a comfortable fit. The carefully designed semi-open-air design delivers a natural sound with exceptional clarity, delivering rich, tight low frequencies and crystal clear mid- and high-range frequencies, while also reproducing the positioning and depth of sound in a realistic manner. Equipped with the XXL transducer, developed for professional models. In addition to the unique Varimotion Technology and two-layer diaphragm that suppress unnecessary vibrations, the internal structure has been optimized and the parts thoroughly selected to realistically reproduce everything from delicate highs to deep lows. ◎Equipped with large ear pads that completely encase the ears, they provide a comfortable fit that won't tire you out even when used for long periods of time. The ear pads are available in synthetic leather and velour. ◎ Features a self-adjusting function that allows you to adjust the length of the headband just by putting it on. ◎The cable is detachable and comes in two types: straight and curly. VariMotion Technology, a technology exclusive to AKG headphones, optimally controls diaphragm movement by varying the thickness of the diaphragm's center and outer edges. The thick "SOUND ZONE" in the center suppresses distortion-causing split vibrations, resulting in extremely clear high frequencies. The thin "MOVEMENT ZONE" on the outer edge supports smooth movement of the "SOUND ZONE" when outputting high frequencies. When outputting low frequencies, it works together with the "SOUND ZONE" to operate like a large diaphragm, producing powerful sound. Installed models: K712 PRO-Y3, K701-Y3, K702-Y3, K612 PRO-Y3, K240 MKII-Y3, K240 STUDIO-Y3, K271 MKII-Y3 Two-Layer Diaphragm: This diaphragm is made by combining and bonding together thin films made from two materials with different vibration damping characteristics. It achieves high damping performance, attenuating unnecessary vibrations that cannot be completely eliminated with a normal diaphragm, resulting in clear, crisp reproduction of the mid- and high-range frequencies. Installed models: K712 PRO-Y3, K701-Y3, K702-Y3, K612 PRO-Y3, K240 MKII-Y3, K240 STUDIO-Y3, K271 MKII-Y3 ■Specifications/Structure: Semi-open air type Sensitivity (1kHz): 91dB SPL/mW・Playback frequency range: 15Hz to 25kHz Maximum allowable input: 200mW Impedance: 55 ohms - Ear pads: Around-ear, detachable, synthetic leather - Input connector: 3.5mm stereo mini plug (gold-plated) Cable: Detachable, single-sided Weight: 240g (excluding cable) Accessories: Headphone cable: 3m straight, OFC (EK300) / 5m curly cord, OFC (EK500 S) Velour ear pads Standard plug adapter (screw type, gold plated)