Sennheiser IE 900 In-Ear Audiophile Headphones – Sound Isolating TrueResponse

Reference-Grade Sound. Engineered for the Discerning Ear.

The Sennheiser IE 900 represents the pinnacle of in-ear monitor engineering — a hand-crafted, audiophile-grade IEM built for those who demand absolute sonic truth. Whether you're deep in a critical listening session or on stage trusting your mix, the IE 900 delivers with uncompromising precision.

TrueResponse Transducer

At the heart of the IE 900 is Sennheiser's proprietary 7mm TrueResponse transducer — a single dynamic driver engineered to reproduce the full frequency spectrum with breathtaking accuracy. No crossover distortion. No phase anomalies. Just pure, uncoloured sound.

X3R Triple Resonator Chamber

The machined aluminium housing incorporates Sennheiser's exclusive X3R resonator system — three precisely tuned resonator chambers that eliminate unwanted resonances and extend bass response without sacrificing transient speed or midrange clarity.

Sound Isolating Design

The ergonomic, over-ear cable routing and multiple ear tip options (silicone and foam) create a secure, fatigue-free seal that passively isolates you from the outside world — letting you focus entirely on the music.

Key Specifications

• Driver: 7mm TrueResponse dynamic transducer
• Frequency Response: 5 Hz – 48,000 Hz
• Impedance: 18 Ω
• SPL: 123 dB (1 kHz / 1 Vrms)
• THD: <0.05% (1 kHz / 94 dB SPL)
• Cable: 3-pin MMCX detachable, 1.2 m
• Includes: 3.5 mm TRS + 4.4 mm balanced + 6.35 mm adapters
• Housing: CNC-machined aluminium
• Weight: 8 g (without cable)

Supplied with a premium carrying case, cleaning tool, and a comprehensive selection of ear tips. Handcrafted in Germany.