Conclusion

The IE40 Pro is a clean sounding iem that provides punchy bass performance, laid-back midrange and sparkly treble. The soundstage has excellent width which provides an open feeling and this contributes to minimal congestion. The overall definition is good. In addition, the IE40 Pro has an ergonomic design with a comfortable fit. The Sennheiser IE40 Pro is an engaging iem with its lively sound.

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