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Etymotic MicroPro ER?4PT Earphone overview

Etymotic (ER-4PT) Headphone/Earphone

Manufacturers Product Description

ER?4PT, the newest model in the MicroPro series, is intended for sound engineers and audiophiles in constant motion. ER?4PT combines the acoustic characteristics and features of ER?4P earphones, and comes with extra mobile adapters and accessories for traveling professionals. Also included is an industry-exclusive channel-matching compliance graph, signed by the Etymotic engineer who precision matched and custom tuned the balanced-armature drivers.

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General Information

Manufacturer Website Address
Brand NameEtymotic
Product TypeEarphone
ManufacturerEtymotic Research, Inc
Product LineMicroPro
Manufacturer Part NumberER-4PT
Product NameMicroPro ER?4PT Earphone
Product ModelER?4PT

Technical Information

Sound ModeStereo
Minimum Frequency Response20 Hz
Connectivity TechnologyWired
Impedance27 Ohm
Cable Length1.52 m
Maximum Frequency Response16 kHz


Package Contents
  • MicroPro ER?4PT Earphone
  • 1/4" Adapter


Earpiece DesignEarbud
Earpiece TypeBinaural

Physical Characteristics

Form FactorOpen


Host InterfaceMini-phone


Limited Warranty2 Year

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