ETYMOTIC ER4S - Single BA Driver Reference In-ear Monitor Earphones

ETYMOTIC ER-4S

Reference in-ear monitors

Standalone category

Etymotic acoustic research focuses on noise-isolating in-ear headphones. The ER4 MicroPro series earphones were the first earphones to be commercialised with balanced armature technology, are recognised worldwide for their accuracy of sound and are the reference for all other earphones. After more than 20 years, these reference-quality earphones remain the instrument of choice for serious sound engineers, audiophiles and musicians.

The result of decades of research and development

World leader in sound reproduction

• Unmatched frequency response accuracy and sound quality - 92%+ response accuracy from 20 Hz to 16 kHz
• The only earphones with balanced armature, precision-fitted, individually tuned drivers
• Highest output sensitivity in its class.

Features:

• Professional quality and reliability
• With precisely matched custom-tuned drivers
• Precision-machined metal bodies with anodized surface
• Detachable, reinforced 1.5m cable with 3.5mm gold-plated stereo plug and MMCX connectors
• Wide ear tips range to ensure proper sealing and comfort

The greatest noise insulation

• The first earphones that completely seal the ear canal
• 98% (35 dB - 42 dB) noise isolation
• Removement of external noise prevents hearing loss

ETYMOTIC ER • 4S - Micro Pro earphones

ER - 4S earphones are designed to compensate for the high frequency range of any CD recording for accurate sound reproduction. Performing musicians often use them as ear monitors because the ER - 4S response is identical to that of monitor speakers. The high accuracy and exceptional sound isolation of the ER - 4S have made these earphones popular with musicians, sound engineers and audiophiles. ER - 4S earphones can be used with a headphone amplifier when using low-power portable devices.

For the headphones to be 100% accurate, the recording of a live performance must produce exactly the same sound on the ear drum as the original performance. To achieve this, the acoustic properties of the ear must be taken into account. The ear's acoustic resonance and horn effect maps the audio signal (2700 Hz) arriving at the open ear with high-frequency amplification to the same sound heard on the eardrum during normal hearing.