Impedance: 150Ω Frequency range: 20-20000Hz Interface: Cable Dependent Cable: None (MMCX) MMCX: Rhodium Plated MMCX The p3k150 v2.0 is 3k Audio's rendition of the famous PK-shelled earbuds. Made in the Philppines, they have 14.8mm drivers inside and can be ordered either cabled or mmcx.