Sennheiser IE 300 High-End Reference In-Ear Headphones

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Sennheiser IE 300 is no longer being produced. Sennheiser has announced the IE 200 as the replacement for the IE 300 model. Offering similar performance at a more affordable price, the IE 200 is Sennheiser's latest addition to the IE series of earphones.  Click to discover Sennheiser IE 200 >

With a host of innovative acoustic technologies that supercharge our 7mm TrueResponse transducer, the IE 300 creates an effortless audiophile listening experience wherever you want one.


  • German-made 7mm patented TrueResponse transducer – Balanced natural sounding character
  • The resonance chamber eliminates your masking resonance
  • Minimized natural resonance with the newly developed diaphragm structure
  • Para-aramid reinforced cables with gold-plated MMCX connectors and a 3.5mm plug
  • The earbud options include a flexible and adjustable ear hook and memory foam ear tips
  • Operates with low impedance (16 ohms)
  • Frequency response: 6 Hz – 20,000 Hz
  • Total Harmonic Distortion < 0.08 % (1 kHz, 94 dB)

Detailed Sound Everywhere

The driving force behind the IE 300 is its refined 7mm TrueResponse transducers that deliver breathtaking acoustic performance in a surprisingly compact design. The diaphragm, reinforced with new materials, dramatically improves response times and consistency across the frequency spectrum. Minimized resonances and enhanced vibration speed bring clarity to higher frequencies, warm mid-tones, and clean, powerful bass response with low harmonic distortion. Transitions between frequencies are clean and vocals retain their silky character, delivering studio-quality sound directly to your ears. XWB transducers reproduce sound that is unique to the Sennheiser audiophile legacy, and are developed and manufactured to exacting precision in Sennheiser's world-class facility in Germany. Despite its small size, the output is larger than life, giving you intimate access to all of your favorite tracks without any issues.

Air Traffic Control

A key element of the IE 300’s balanced acoustic performance is the back volume—a miniature chamber-within-a-chamber that helps manage the flow of air behind the transducer. The direction and overall volume of air is controlled with precision as it travels through and exits the transducer system, delivering a discernibly defined bass and mid-range experience. We further observed a natural increase in the ear canal’s resonant frequency when sealed by an ear tip adapter. The reduced air volume produced a masking effect that obscured critical details within the source signal. A frequency absorbing resonator chamber was applied to reveal those subtle nuances once again. This collection of technologies works together in perfect harmony, establishing the IE 300 as a go-to benchmark earphone when sound quality matters.

In-Ear Peace

The IE 300 ensures that you can enjoy a thrilling hi-fi experience wherever you are. Imagine having a personal, expertly tuned listening room at your command—ready to provide sonic bliss at a moment’s notice. Because the IE 300 shields you from ambient noise, your music stays in control of every listening session. The reduction of ambient noise diminishes ear-fatigue for better, longer listening sessions in practically any location you could dream up.

Inspiring performance

A universal design that feels like it was custom tailored just for you. Included with the Sennheiser IE 300 are (3) sizes of silicone ear tips and (3) sizes of memory foam ear tips—the latter conform to the unique shape of your ear canal for maximum noise-isolating performance. This earphone’s geometry is more than just sleek form—it never gets in the way so that nothing stands between you and your music while on the move.

It's all about connection

Outfitting the IE 300 with a detachable cable was an obvious choice; however, audiophile-grade sound demands a matching level of mechanical reliability. Our engineers were tasked with delivering peerlessly dependable compact earphones that could withstand any wear and impact. To achieve this, they started with gold-plated Fidelity+ MMCX connectors—known for their rotational durability and contact integrity—and seated each within a recessed, 4.8mm-wide socket beneath the housing's surface. This yields outstanding strain relief and stability, providing users with the utmost confidence that their IE 300 will always be ready to perform—especially when combined with our para-aramid reinforced cable rated for thousands of bend cycles. A stereo 3.5mm / ⅛-inch plug offers the standard connection to digital audio players, headphone amp-DAC combos, laptops, mobile phones, audio interfaces—the number of devices whose sound is waiting to be rediscovered is endless. Balanced 2.5mm and balanced 4.4mm terminated cables will be available (sold separately), opening access to the new generation of balanced output devices popular in the audiophile community.


Headphone type


Clothing type

Wired use with flexible ear hooks


Gold-plated MMXC connectors Gold-plated 3.5mm output


18 grams

Frequency range

6Hz – 20,000Hz


16 Ω

sound level

124 dB (1 kHz, 1 Vrms )

Total Harmonic Distortion

< 0.08 % (1 kHz, 94 dB)

Drive type and size

7mm dynamic driver


Package information


Box contents

IE 300

Cable with MMCX connector 3.5mm

Eartips (S, M, L)


Cleaning Cloth

User guide

Packaging Type

Cardboard box

Languages ​​on the Box

English, German, French, Spanish, Chinese, Japanese

Package Dimensions (L x W x H)

128 x 57 x 222mm

Box Weight


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