The IE 40 PRO is designed for musicians, singers and sound engineers to facilitate their daily work on stage, in the studio and in the rehearsal room. The in-ear headphones feature improved ergonomics and sound quality as well as the most reliable connector system available on the market.
Its newly developed dynamic broadband converter ensures precise, distortion-free sound even at high sound pressure levels and offers an even frequency response over the entire spectrum with a powerful bass foundation at the same time. The ergonomically optimized housing of the compact in-ear headphones with only 10 mm small transducer not only offers a secure fit and maximum wearing comfort, but is also extremely stable. The special cable routing makes the IE 40 PRO perfect for mobile life.
Dynamic individual drivers of the next generation
Most in-ear headphones today use balanced armature transducers, as found in hearing aids. With this technology, the sound signal is split by a crossover and distributed to several drivers. Sennheiser has further developed the principle of the dynamic single driver, revolutionizing the market for in-ear headphones. Thanks to the new TrueResponse technology, the entire frequency spectrum can be mapped with a single driver, without any crossover effects or phase shifts. The sound is completely distortion-free, reducing acoustic stress for musicians, sound engineers and DJs. It remains natural and differentiated even at very high sound pressure levels - and can assert itself even in the loudest environments. Our new in-ear headphones deliver what they promise: "More me" - for better performance through improved hearing.
The advantages of the new TrueResponse technology from Sennheiser at a glance:
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I hate wireless headphones, do not enjoy the idea of having another device to charge all so I can listen to music.
Having had a set of ie4s for 2 years (which I loved I must add) I decided to give the ie40s a try and I have to say at that price point you really can't go wrong.
Well built and well designed, the addition of a removable cable making it more like high end IEMs is perfect and just means that should the cable get broken you only need to replace that part and not the whole set (like what happened with my ie4s).
For me sound is a big thing and these headphones provide a clean and clear sound with not as much colouration as other headphones of this price range but equally they are by no means flat (which I am not expecting at this price range).
They are comfortable and stay in my ears even when I am out running or when I have used them on stage (they offer suprisingly good isolation).
Hard to rate for features because they are a set of in ear headphones, they do as they are supposed to and are great value for the money so 5* all around.
Highly recommend and have already persuaded a colleague of mine to get a pair!