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Sennheiser IE 900 Audiophile in-Ear Monitors - TrueResponse Transducers with X3R Technology for Balanced Sound, Detachable Cable with Flexible Ear Hooks, Includes Balanced Cables, 2-Year Warranty
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Purchase options and add-ons
Brand | Sennheiser Consumer Audio |
Model Name | IE 900 |
Color | Silver |
Form Factor | In Ear |
Connectivity Technology | Wired |
About this item
- Innovative X3R technology, unique to the IE 900, combines the German-made 7mm transducerwith specially developed membrane foil, triple-chamber absorber and acoustic vortex for anintense listening experience.Specific uses for product : Music
- Larger-than-life sound from 7mm TrueResponse Transducer, crafted in Germany specifically forin-ear listening using the entire frequency spectrum for critical hearing of all elements of the source
- Unique triple-chamber absorber system and acoustic vortex removes masking resonances for a refined and extended treble. Newly developed membrane foil minimizes resonances and distortion
- Equipped with para-aramid reinforced cables with gold plated MMCX connectors which possesses a special recessed and robust design to ensure reliability even after over 500 attachment cycles
- Selection of silicone and memory foam ear adaptors in 3 sizes (S/M/L) and adjustable ear hooks to ensure an optimal fit and high noise isolation
- Product includes: 3 connecting cables with MMCX connectors; single ended 3.5mm and balanced 2.5mm & 4.4mm, silicone & memory foam sets (S, M, L), carry case, cleaning tool and user manual
- 2-year warranty
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Consumer Alert
From the brand
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We are audio experts and music lovers who’ve been striving for the best audio experience. Through the craft and precision of German Engineering we create innovative products to reinvent the future of audio with remarkable audio experiences that you don’t just hear – but feel. That is what the Sennheiser brand has represented for more than 75 years.
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Intense Science
We are driven by the passion to create audio solutions that make a difference, by constantly rediscovering the needs of our customers.
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Intense Sound
Our ability to redefine sound has continued to set the norm, allowing music lovers worldwide to experience sound in a new dimension.
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Intense Emotion
As audio fanatics we strive for a remarkable sound you not only hear – but feel. We measure our success by the goosebumps on your skin.
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We invite you to discover our wide variety of premium audio products, which are divided into the following four categories: Premium Headphones, Audiophile Headphones, Hearing Solutions and Soundbars.
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Premium Headphones
Offering a wide selection of headphone styles from True Wireless to Over-Ear for premium music enjoyment no matter where you are.
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Audiophile Headphones
Continuously striving to define new industry standards with headphones for both home and mobile listening.
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Hearing Solutions
Seeking to provide market-leading enhanced hearing products from TV listening to situational hearing.
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Soundbars
Providing outstanding immersive sound experiences for home entertainment by a single device.
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From the manufacturer
Sennheiser IE 900. Every Detail Matters.
The new IE 900 from Sennheiser sets a new benchmark in portable audio fidelity through technical innovation (X3R technology), meticulous attention to detail, and an uncompromising demand for perfection.
Every aspect of the IE 900 has been engineered to work in harmony to achieve the desired acoustic tuning and to reduce resonances and masking effects. Its acoustic design ensures brilliant, natural high-end sound reproduction and reveals even the finest details in the music.
Introducing the X3R technology
Innovative X3R technology, unique to the IE 900, unites the German-made 7mm TrueResponse transducer with specially developed membrane foil, triple-chamber absorber system and acoustic vortex for an intense listening experience.
What refines the X3R technology is its three Helmholtz resonator chambers and acoustic vortex which smoothens masking resonance. The three resonator chambers are precision-drilled into the elegant aluminum chassis of the IE 900 and placed between the diaphragm and the nozzle.
This complete harmony of systems is at work to unlock the details buried within every track.
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German-made 7mm TrueResponse Transducer provides extra wide frequency extension and ultra-low distortion for exceptionally natural sound. The drivers in each pair of IE 900s are matched during our automated transducer manufacturing process to practically eliminate variance. |
The specially developed membrane foil used in the transducer diaphragm delivers rapid response times for pristine, clear audio across the entire frequency spectrum, even at atypical volume levels. |
The triple-chamber absorber is a sophisticated system of three Helmholtz resonators milled into the solid aluminum housing. These tiny channels eliminate resonance peaks which can color the sound signature and alter the feel of your music. |
Milled directly into the nozzle, the acoustic vortex is a complex structure which swirls acoustic energy in these frequency bands to smooth out peaks. |
Ultimate precision & craftsmanship
Designed, engineered, and made in Germany the one-piece housing is precision-milled from a single block of aluminum on an avant-garde 5-axis-CNC machine.
The demanding milling process takes 40 minutes for each pair of IE 900. Components are hand-assembled by a specialist team at Sennheiser's headquarters with meticulous attention to detail.
A precise fit for precise sound
The secure form fitting lightweight high-strength anodized aluminum housing offers exceptional resistance and long-lasting aesthetic beauty. Adjustable flexible ear hooks and a selection of silicone and memory foam ear adaptors in 3 sizes (S/M/L) adapt to the natural shape of your ear for a tailored fit and high noise isolation.
Let’s take a look at the specifications...
- Transducer principle: Closed-back single dynamic driver, pressure chamber
- Transducer size: 7mm
- Frequency response: 5 Hz – 48,000 Hz (-10 dB)
- Impedance: 16 Ohms
- THD: <0.05% (94 dB, 1 kHz)
- Cable connector: Gold-plated Fidelity+ MMCX Connectors
- Weight: 4 g (single earphone); 24 g (earphones with cable)
Compare with similar items
This Item Sennheiser IE 900 Audiophile in-Ear Monitors - TrueResponse Transducers with X3R Technology for Balanced Sound, Detachable Cable with Flexible Ear Hooks, Includes Balanced Cables, 2-Year Warranty | Recommendations | dummy | dummy | dummy | dummy | |
Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | |
Price | -23% $999.94$999.94 List: $1,299.95 | $229.99$229.99 | -7% $62.99$62.99 List: $67.99 | $269.00$269.00 | -50% $7.49$7.49 List: $14.99 | -10% $809.00$809.00 Typical: $899.00 |
Delivery | Get it May 15 - 17 | Get it as soon as Friday, May 17 | Get it as soon as Thursday, May 16 | Get it as soon as Thursday, May 16 | Get it as soon as Thursday, May 16 | — |
Customer Ratings | ||||||
Sound quality | 4.7 | 4.6 | 4.2 | 4.0 | 3.7 | 4.3 |
Noise cancellation | 4.2 | 4.0 | 3.6 | 4.1 | 3.4 | 4.3 |
Comfort | 4.7 | — | — | — | 4.3 | 4.2 |
Quality of material | — | 5.0 | 3.9 | 4.5 | — | — |
Bass quality | — | — | 3.9 | 3.4 | 3.4 | — |
Sold By | Onlinellc | Hour Loop | 1MORE USA Inc | Amazon.com | Amazon.com | Amazon.com |
connectivity tech | Wired | Wired | Bluetooth, NFC | Wired, Wireless | Wired | Wired |
headphones form factor | In Ear | In Ear | In Ear | Over Ear | In Ear | In Ear |
connector type | 2.5mm Jack | 2.5mm Jack | 3.5mm Jack | 3.5mm Jack | 3.5mm Jack | 3.5mm Jack |
noise control | sound isolation | — | sound isolation | active noise cancellation | — | sound isolation |
headphones jack | 3.5 mm Jack, 2.5 mm Jack | 3.5 mm Jack, 2.5 mm Jack | 3.5 mm Jack | 3.5 mm Jack | 3.5 mm Jack | 3.5 mm Jack |
cable feature | Retractable, Detachable | Tangle Free | Tangle Free | Detachable | Retractable | Detachable |
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Product information
Special Feature | Lightweight |
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Included Components | IE 900 earphones, Unbalanced para-aramid reinforced cable with 3.5 mm connector, Balanced para-aramid reinforced cables with 4.4 mm and 2.5 mm connectors, 3 pairs of silicone ear adapters (S/M/L), 3 pairs of memory foam ear adapters (S/M/L), Cable clip, cleaning tool and cloth, Carry case, Presentation box with signed customer certificate and user manuals |
Age Range (Description) | Adult |
Material | Aluminum |
Specific Uses For Product | Music |
Headphones Jack | 2.5 mm Jack, 3.5 mm Jack |
Noise Control | Sound Isolation |
Ear Placement | In Ear |
Control Type | Media Control |
Cable Feature | Retractable, Detachable |
Item Weight | 4.54 g |
Water Resistance Level | Not Water Resistant |
Unit Count | 1 Count |
Number of Items | 1 |
Cable Length | 1.25 Meters |
Manufacturer | Sennheiser |
Item Weight | 0.16 ounces |
ASIN | B094DP3177 |
Item model number | IE 900 |
Customer Reviews |
4.2 out of 5 stars |
Best Sellers Rank | #170,070 in Electronics (See Top 100 in Electronics) #8,263 in Earbud & In-Ear Headphones |
Is Discontinued By Manufacturer | No |
Date First Available | May 14, 2021 |
Warranty & Support
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Product Description
The new IE 900 from Sennheiser sets a new benchmark in portable audio fidelity through technical innovation, meticulous attention to detail, and an uncompromising demand for perfection. The IE 900’s acoustic design ensures brilliant, natural high-end sound reproduction. It features a refined version of Sennheiser’s 7mm audiophile Extra Wide Band XWB transducer system, engineered to tighter tolerances and expertly tuned for even greater fidelity, and a unique triple-chamber absorber T3CA system. These advances produce high dynamics in a precise and controlled manner, so music stays distortion free and extremely transparent at any listening volume. The IE 900 is manufactured by a specialist team at Sennheiser’s headquarters in Germany to the highest production standards in the audio industry, ensuring exceptional lasting quality.
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the sparkle, comfort, sound quality, detail and clarity of the headphones. They mention that it has beautiful realism, deep contoured bass and that it gives a waterfall of listening pleasure. However, some customers have reported issues with the connectivity.
AI-generated from the text of customer reviews
Customers say the sound quality of the headphones is excellent. They appreciate the deep contoured bass, and the incredible sense of presence. They also appreciate the cleanness and separation of the sound, along with the way the IE900s deliver lows and highs. Customers also mention that the sound is dynamic and very engaging, with outstanding bass and treble.
"...hear exactly where each sound is coming from, and the layering of the sounds is outstanding for an IEM; this gets back to what I mentioned about the..." Read more
"...Again it’s extremely great- full meaty, tight, fast, powerfully booming! and of the highest quality bass possible, perfect bass has finally arrived...." Read more
"...The single dynamic driver yields organic and true to life sound with beautiful realism especially when compared to my 64 Audio u12t. The u12t is..." Read more
"...The taste is warm and soundstage is pretty wide...." Read more
Customers find the headphones very comfortable, and the wire is also comfortable. They say the headphones are meant for long, comfortable listens, and that the punch is relaxed and controlled at all volumes.
"...First, just on general comfort - for me, these are the most comfortable in-ear earphones I have ever worn, aside from my customs that were 3D..." Read more
"...I highly recommend this set, it’s wear all day long comfortable, it’s aluminum housing is indestructible, with three perfect non tangle free- cables..." Read more
"...Add their small size, comfort is outstanding allowing you to leave them in for hours at a time...." Read more
"...Comes with 3 different cables. Stock earplugs work pretty well. Very comfortable...." Read more
Customers are satisfied with the quality of the earphones. They mention that it has superb-unreal quality, the mids overall are very good, and the aluminum housing is indestructible.
"...Given these are a Sennheiser flagship, the mids overall are VERY good, my comments are getting into the nitty gritty nitpicking...." Read more
"...powerful, and meaty, incredibly- tight, and fast, with superb-unreal quality. The IE 900 bass presentation, has been unattainable, until now!..." Read more
"These are absolutely fantastic earphones.The best you can get in compact listening at all...." Read more
"...Insanely better tuning, higher quality, a little bit less comfortable, but still pretty good, and its right at $1000." Read more
Customers like the sparkle of the headphones. They mention that it has beautiful realism, and a smooth, articulate wall of sound. They also appreciate the design and fit. Customers also say the range and highs are precise, perfect, and crystal clear.
"...in a low-end that is smooth, fast and articulate, with sparkly details layered on top. It is truly well-done...." Read more
"...900 has superb-sound quality, it’s mid range and highs are precise, perfect, and crystal clear, they’re super clean-sounding, with an unsurpassed,..." Read more
"...single dynamic driver yields organic and true to life sound with beautiful realism especially when compared to my 64 Audio u12t. The u12t is..." Read more
"...Sennheiser's would have worked because I liked the low profile, sound, design, and fit plus the accessories were pretty cool..." Read more
Customers appreciate the detail, clarity, and presentation of the headphones. They say it has a high-detailed treble response presentation, and does a better than decent job at detail retrieval and layering. Customers also mention that the mix is silky smooth, articulate, and detailed.
"...shine against the elevated sub-bass, and these do a better than decent job at detail retrieval and layering, so that extra treble emphasis brings..." Read more
"...-sound quality, it’s mid range and highs are precise, perfect, and crystal clear, they’re super clean-sounding, with an unsurpassed, highly detailed..." Read more
"...The sound is detailed, and highly analytical. The bass is good and is punchy and shows up where appropriate...." Read more
Customers like the size of the headphones. They mention that the small foam tips fit perfectly into their ears and get a perfect seal. They also say that the length of the IEM fits perfectly with the natural curvature of their ears. Overall, most are satisfied with the size and quality of the product.
"...The length of the IEM fits perfectly with the natural curvature of my ears, and the small foam tips fit perfectly into my ears and get a perfect..." Read more
"...Again it’s extremely great- full meaty, tight, fast, powerfully booming! and of the highest quality bass possible, perfect bass has finally arrived...." Read more
"...Add their small size, comfort is outstanding allowing you to leave them in for hours at a time...." Read more
Customers have issues with the connectivity of the headphones. They mention that the cable has a major problem and the proprietary MMCX connector is not good.
"...and the inspection but there is a major problem with the cable and connection to the IEM...." Read more
"...awesome when they work some of the best iems I heard but the cable is no good" Read more
"Bad Connections with Proprietary MMCX Connector..." Read more
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Top reviews
Top reviews from the United States
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My current equipment...
Every day use: Sennheiser Momentum True Wireless 3, Apple AirPods Pro, Apple AirPods Max
Detailed listening: Ultimate Ears UE11 Pro Custom IEM, Sennheiser IE900, Focal Clear, Audeze LCD-X, Final Audio D8000 Pro, Denon AH-D9200, Fostex TH900Mk2, Fostex HP-A4 (Desktop DAC/Amp), Dragonfly Cobalt (Mobile DAC/Amp)
...As you can see, pretty much all of my equipment, whether low-end or high-end, has an either V-Shaped or U-shaped response curve, and that includes the IE900s. My intention is to use these for detailed listening when I travel, as most of my others are just too cumbersome for that. Now let me get into some thoughts...
First, just on general comfort - for me, these are the most comfortable in-ear earphones I have ever worn, aside from my customs that were 3D printed for my ear. The length of the IEM fits perfectly with the natural curvature of my ears, and the small foam tips fit perfectly into my ears and get a perfect seal. The IEMs are also extremely light, which makes comfort even better. It is easy to forget these are in your ear, and you can easily wear them for hours (and I have). The wire is also comfortable, but I do have to mention that it is fairly microphonic (you can hear when it brushes against objects). The included shirt clip helps with this, but it is a potential issue. I have not used the silicone tips at all because I love the foam ones so much. I appreciate that Sennheiser included three different wires with different sized tips, though I would've preferred that they include at least one longer cable, in case anyone wants to use these for desktop use (as they sure could be used for it). Also, of course, everyone's ears are different, and I have seen some folks on forums that haven't had as good of luck with the fit - and fit is key for good sound from an IEM. No way to know for sure until you try them.
In terms of sound...
Sennheiser is known for lots of different approaches to their sound profiles - all of them extremely well-done. On the consumer/mid-fi side, they have the Momentum series, and these have VERY V-shaped response curves with big, big bass. Then you have their hi-fi line, including open-backs like the legendary HD800s, and these have a very rolled-off bass response, with very forwardly-presented, open highs.
In my view, the IE900s take elements of both of the examples I mentioned above. The overall balance here is definitely U-shaped, with a noticeable but not overdone emphasis in the sub-bass region and a lift in the highs, especially in the detail frequencies and upper mids. The cleanliness and separation of the sound, along with the way the IE900s deliver lows and highs together, results in a low-end that is smooth, fast and articulate, with sparkly details layered on top. It is truly well-done.
It is simply hard to put into words how smooth it is. Even on tracks that have punchy baselines, the IE900s deliver that punch in a way that is relaxed and controlled at all volumes. It is difficult to find an earphone that does bass so well that it is like having a subwoofer WITHOUT it bleeding into the other sounds. The IE900s do this very well. The bass is not boomy or punchy, but it is definitely there, and shines. What it may lack in quantity vs. some other IEMs, it more than makes up for in quality. Now, I have seen in some other reviews here that the bass is better than any headphone, including over-ears. That is simply not true and is an unfair comparison. The small drivers in IEMs (7mm in the IE900) cannot compete with the bass quality of a driver 7x it's size in an over-ear headphone (for example, my TH900s have 50mm drivers). From someone that loves bass, I was not disappointed in any regard with the IE900s. They are outstanding for their product type.
The highs here also shine as a standout, which is not surprising given Sennheiser reputation with detail in the highs. What is great about these is they are meant to be for long, comfortable listens. The highs on these are definitely elevated, and it is immediately noticeable. They are not overly bright overall, but I would say that Sennheiser has taken the highs right up to one notch below too much. This, for me, is a good thing. The highs really shine against the elevated sub-bass, and these do a better than decent job at detail retrieval and layering, so that extra treble emphasis brings out the intricacies of the high end - and thankfully, it is never grating or overly harsh, even at volume - it is another piece of that overall smoothness of the sound.
The mids are interesting. Given these are a Sennheiser flagship, the mids overall are VERY good, my comments are getting into the nitty gritty nitpicking. The upper mids are slightly elevated as I mentioned when discussing the highs. This gives female vocals an absolutely superb energy and feel in the mix. They tend to have a nice energetic shine on them. Male vocals, only by comparison to the female vocals, are slightly less energetic. I would not say they come off as recessed, they are just not quite as energetic as the female voices. All of the other action in the mids comes off to me as properly balanced, never congested, and able to keep pace with any genre of music without getting any pieces bleeding into each other. What really makes the mids shine is the positioning, so lets get into spatial presentation and performance.
What shines about the IE900s spatial presentation is the positioning. The soundstage itself is not particularly large. The sound goes from ear to ear, no further, and definitely retains what is traditional of IEMs, which is having an "in your head" type of soundstage. What IS impressive about the presentation is the HEIGHT of the soundstage and the positioning of the sounds within that stage. I would say the IE900s produce a soundstage height from about the mouth/chin up to the forehead, and that extends ear to ear. The way the IE900s handle each individual sound and detail within this space is superb. The entire sound plane is utilized. Often with headphones, you get a sense that everything is either coming from the left, right or center - not so with these. You can point to and hear exactly where each sound is coming from, and the layering of the sounds is outstanding for an IEM; this gets back to what I mentioned about the mids. It's not the tonal balance of the mids that shines on these, it is the way they are positioned in the mix to be silky smooth, articulate and detailed. So, while the soundstage size on the IE900s isn't particularly impressive in its size (though I would say it is perfectly acceptable for a IEM), it does get an A+ from me in the way it utilizes the soundstage it creates.
Overall, very glad I added these to my collection. While they don't match the performance of my over-ear flagships, that should not be expected. For the moments when I want a hi-fi level listening experience on the go, these are my new go-to IEMs, replacing my custom UE 11 Pros. To quickly compare those two, the UE 11 Pros are actually intended for band members and DJs, and while they produce strong sound, that sound is far more flat and analytical in its delivery, which a much more constructed and in your face soundstage. It is immediately evident the difference in tuning the IE900s bring, and they are clearly meant to be a more engaging listening experience. Now enough writing for me and back to listening :)
Reviewed in the United States on July 21, 2021
The single dynamic driver yields organic and true to life sound with beautiful realism especially when compared to my 64 Audio u12t. The u12t is excellent for its own reasons but as an all balanced armature IEM can sound a bit plasticky at times . Imaging of the u12t is a bit better than the ie900s to my ears but bass tends to sound a bit fake as it can't match the texture of the ie900s bass. In a nut shell, the ie900s sound is excellent!
Why three stars? Connection issues.
Proprietary MMCX connectors (ie900s) in principle give a more "Positive" connection due to snapping into place. Two pin connectors (u12t) use a male/female slide on method with what feels like friction keeping them in place. So in theory, the MMCX should provide a superior connection.
In my case, disconnection issues have plagued my last 2 sets of ie900s. For example, I could turn my head either left or right and one or both IEMs would intermittently disconnect, very annoying!
Keeping the Definition of Insanity in mind, I am going to give the ie900s one more go. Why? Should I be lucky enough to receive set with no issues, they will become a permanent addition to my collection due to sound quality alone. Add their small size, comfort is outstanding allowing you to leave them in for hours at a time.
In conclusion, I hope the third time's is a charm as I have been really impressed with the sound quality. At a $999.00 sale price as of this review, the ie900s punch well above their price point.
Top reviews from other countries
El año pasado compré el IE 600 ya que aparentemente TODOS lo recomiendan como el “IE 900 refinado”, y ahora que tengo el IE 900 puedo decir con certeza que es un producto muy malentendido.
Sí, el IE 600 tiene objetivamente un mejor material, un mejor precio y un sonido más neutral y timbre correcto pero en el aspecto técnico está MUY por detrás de su hermano mayor.
El IE 900 es más amplio, más holográfico en su presentación sonora y mucho más rápido en la respuesta de transientes.
Los bajos pegan rápido, retumban y decaen de manera natural. Las voces tienen un aire y definición adicional que les añade un gusto excepcional. Los altos son súper bien articulados, presentes e infinita mente más claros que los IE 600 sin llegar a ser sibilantes o molestos.
El IE 900 es verdaderamente excepcional como logran mezclar rendimiento increíble con un sonido divertido, envolvente y disfrutable.
NO son audífonos de estudio 100% neutros y aburridos para mezclar, son todo lo contrario y me hacen sonreír al escuchar música; la cual disfruto como cuando compré mis primeros audífonos decentes hace 20 años y eso es muy raro y especial para mi.
Recomendado si aprecian la ingeniería alemana y tienen buen oído, si no los IE 300 les darán 70% del rendimiento a 1/5 del precio.
Reviewed in Mexico on January 16, 2024
El año pasado compré el IE 600 ya que aparentemente TODOS lo recomiendan como el “IE 900 refinado”, y ahora que tengo el IE 900 puedo decir con certeza que es un producto muy malentendido.
Sí, el IE 600 tiene objetivamente un mejor material, un mejor precio y un sonido más neutral y timbre correcto pero en el aspecto técnico está MUY por detrás de su hermano mayor.
El IE 900 es más amplio, más holográfico en su presentación sonora y mucho más rápido en la respuesta de transientes.
Los bajos pegan rápido, retumban y decaen de manera natural. Las voces tienen un aire y definición adicional que les añade un gusto excepcional. Los altos son súper bien articulados, presentes e infinita mente más claros que los IE 600 sin llegar a ser sibilantes o molestos.
El IE 900 es verdaderamente excepcional como logran mezclar rendimiento increíble con un sonido divertido, envolvente y disfrutable.
NO son audífonos de estudio 100% neutros y aburridos para mezclar, son todo lo contrario y me hacen sonreír al escuchar música; la cual disfruto como cuando compré mis primeros audífonos decentes hace 20 años y eso es muy raro y especial para mi.
Recomendado si aprecian la ingeniería alemana y tienen buen oído, si no los IE 300 les darán 70% del rendimiento a 1/5 del precio.
Der Klang ist unbeschreiblich gut. Obwohl die Größe bauartbedingt sehr klein ist- ist der Klang wie in einem Konzersaal.
Die Ohrstöpsel lassen sich gut mit der Auswahl an Adaptern an den Gehörgang anpassen.
Egal wie laut ich aufdrehe- kein Ton geht nach außen.
Einzig dass die Kabel recht kurz sind.
Fazit: wer das Geld dafür hat - unbedingt kaufen.