Sennheiser

Sennheiser IE 900 In-Ear Headphones Review

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MSRP $1,700
Released
January 2021

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Sennheiser IE 900 In-Ear Headphones
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Our take
Worth consideringPreliminary

Our editorial take on the Sennheiser IE 900 In-Ear Headphones

The Sennheiser IE 900 are premium in-ear monitors focused on audio fidelity through a single dynamic driver design. Their chambered construction aims to minimize resonance, contributing to a stated wide frequency response of 5 Hz to 48 kHz. These headphones are presented as a high-end option for listeners prioritizing a detailed and uncolored sound experience in a portable format.

Designed for versatility in connectivity, the IE 900 includes detachable cables with 3.5mm, 4.4mm, and 2.5mm balanced connectors, offering compatibility with various audio sources. The use of a single dynamic driver per earpiece, along with a closed-back design, suggests an emphasis on sound purity and isolation. With a maximum SPL of 123 dB and an impedance of 16 Ohms, they appear capable of delivering significant volume from a range of devices.

Given their specifications, the IE 900 positions itself as a contender in the upper tier of wired in-ear headphones. The absence of active noise cancellation or an integrated microphone indicates a clear focus on core audio performance over additional features, catering to audiophiles and critical listeners.

Best for: This product is suitable for audiophiles and critical listeners who prioritize high-fidelity wired audio and a wide frequency response in a portable in-ear format, and value flexible connectivity options.
What's great
  • Single dynamic driver design, often favored for cohesive soundstage
  • Wide frequency response (5 Hz to 48 kHz) suggests detailed audio reproduction
  • Max SPL of 123 dB allows for high volume output
  • Multiple included cables (3.5mm, 4.4mm, 2.5mm balanced) for broad compatibility
  • Lightweight design (0.3 oz per earpiece without cable) for extended wear
Watch outs
  • No built-in microphone for calls or voice commands
  • Lacks active noise cancellation, relying on passive isolation
  • Wired-only connection limits mobility compared to wireless options

Synthesized by Geared editors from early expert reviews.

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Overview

About this product

The Sennheiser IE 900 are in-ear headphones designed for sonic excellence, featuring a single dynamic driver construction and a chambered design to reduce resonances. They offer a frequency response from 5 Hz to 48 kHz and include cables for 3.5mm, 4.4mm, and 2.5mm balanced jacks, along with various eartips and accessories.

Specs

Color
Silver
Weight
0.3 oz / 8 g (Each, without Cable) 0.8 oz / 23 g (with Cable)
Impedance
16 Ohms
Driver Size
0.3" / 7 mm
Driver Type
Dynamic
Sound Field
Stereo
Built-In Mic
No
Cable Design
Detachable / Straight
Cable Length
4.1' / 1.25 m
Wearing Style
Dual Wired Earbud
Package Weight
0.97 lb
Audio Connector
1x 1/8" / 3.5 mm TRS 1x 2.5 mm TRRS 1x 4.4 mm TRRS
Earpiece Design
In-Ear (Intra-Aural)
Included Adapter
No
Open/Closed-Back
Closed-Back
Number Of Drivers
1 per Earpiece
Frequency Response
5 Hz to 48 kHz
Wired Audio Connector
1x 1/8" / 3.5 mm TRS 1x 2.5 mm TRRS 1x 4.4 mm TRRS
Box Dimensions (LxWxH)
9 x 5 x 2.6"
Active Noise Cancellation
No
Audio Connector To Earpiece
MMCX
Maximum Sound Pressure Level (SPL)
123 dB
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