The Yuin PK2 offers excellent sound quality for an earbud style headphone without needing amplification.
Yuin PK2 earphones are the low impedance version of the PK1. The PK2’s sound signature is similar to PK1 however you don’t have to drive PK2 with a dedicated head-amp. If you are looking for something with high performance/price ratio, PK2 might be the best choice. The earphones offer smooth, natural mid and high. The deep and punchy bass can bring you in an atmosphere of sensation. The wide and realistic sound stage is remarkable as if you were listening to bigger hi-fi grade headphones!
Hard carry case and spare foam covers are included.
The Yuin PK2 offers really excellent sound quality for an earbud style headphone, however being an earbud means the sound quality will rely heavily on how well they fit your ears and the lack of isolation offered may not make them practical for use in noisy environments such as public transport.
If you absolutely have to have earbuds, the PK2 from Yuin is a great choice.