For Denon AH-MM400 MM200 MM300 Earphone Replaceable 4.4mm 3.5mm 2.5mm Balanced Single Crystal Copper Upgrade Cable Size:3.5mm Stereo so the sound effect is

so the sound effect is significantly improved

reduces signal transmission loss and sound attenuation

4mm sockets such as SONY and iBasso4

For earphone model:The earphone end is a headphone with 2

For Denon AH-MM400 MM200 MM300 Earphone Replaceable 4.4mm 3.5mm 2.5mm Balanced Single Crystal Copper Upgrade Cable Size:3.5mm Stereo so the sound effect isBrand: EarmaxMaterial: high purity single crystal copperModel: MM400 replaceable cableLength: 130cmPlayer end: 2. 5mm 3. 5mm 4. 4mmHeadphone end: 2. 5mmOuter diameter: 3mmSpecification: 4 strands x 63 pieces x 0. 05mmFor: Denon Tianlong AH MM400 MM200 and other 3. 5mm headset. Advantages: 4 strand single crystal copper silver plated braid, resistant to tension, cold, and hardness at low temperature, minimizing discomfort caused by friction., High end