Sennheiser HD219

Disclaimer: This is another pair I borrowed from Rick.

Sennheiser HD219 is a low-cost, closed-air/closed-back supraaural headphone, which is designed for portable usage.

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PRO: Light-weighted. HD219's frequency response is quite faithful to the diffuse-field reference  in the mid-range.

CON: A slight channel mismatch in the mid-range & an extreme amount of distortion in the bass.

ON SECOND THOUGHT #1: As expected, this headphone's frequency response does not match the headphone reference target suggested by Harman International.