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Sennheiser IE 40 PRO Review

Sound Quality

The quality of Sennheiser’s latest 10mm broadband dynamic driver shines with the IE 40 PRO exhibiting a warm sound signature with lots of details and clarity. The insulation from ambient sound is impressive for the application of these IEMs, particularly when using the memory foam ear tips.

Sennheiser IE 40 PRO

At the low-end, the bass can not only be heard but also felt and this continues all the way to the lower-mids which will definitely bring smiles to bass players, guitarists, drummers, as well as bass lovers. The presence and balance of the 3 Ds; namely depth, definition, and details has allowed me to appreciate the low-end delivered on the IE 40 PRO.

Similar to the low-end and lower-mids, the higher-mids and high-end are in harmonious coherence delivering well-defined mids and crystal-clear highs. Vocals are particularly impressive, cymbals and percussions are crisp, clear and concise. Immersing one’s self in the musicality of the IE 40 PRO, one would be able to experience a soundstage that is wider than average and well-defined in sound imaging.

Incredibly detailed and engaging, this despite the absence of a 4th D – decay which speaks volumes for the sound quality of IE 40 PRO. One could attribute the lack of decay to allow musicians and sound engineers to monitor live performances effectively, hearing every detail with phase linearity.

Part 1: Introduction, Design and Build
Part 2: Sound Quality
Part 3: Product Specifications
Part 4: Review Ratings, Summary

Goh Beng Yeow
Goh Beng Yeow
Goh Beng Yeow, the Founder / Editor at Porta-Fi™, is a recipient of the IT Youth Award in Singapore. Twice nominated for EY Entrepreneur of the Year Awards, Beng Yeow has previously founded startups such as PDALive.com, Coded Pixels Consultants and was a Tech writer for TODAY, a national daily newspaper under MediaCorp. Since 2017, he has been writing, editing and producing commentaries, interviews, news and reviews on Porta-Fi™. In 2019, Beng Yeow was appointed Advisor to LHDC™, the industry's latest low latency and high-definition Bluetooth audio codec.

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