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Title: Comparing to AKG K55 and Plantronics DSP-500
Review: I compare this to AKG K55. The PC140 is with very nice sweet high, but not as full as the K55 in the mid the bass. The sound of PC140 is clean but very relax. This is the Sennheiser sound. Some other brand like Plantronics (DSP-500) is with clean but strained sound, which are good for Jazz or game but not good for classic or vocal.Sensitivity of the PC140 is low. I guess we need a good sound card to drive it. The on/off switch does not work from the time I open the brand new box. I guess the QC of this company is not that strict.
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