100%
Etymotic ER4SR Studio Reference Earphone
by Etymotic Research— Made in Elk Grove Village, IL
Verified American Made
American Score
77% — Brand-verified
Why not 100%? Full verification requires additional independent sources
Manufactured in Elk Grove Village, IL
Manufacturing in USA since 1983Verified through 2 independent sources
- Known factory location
- Brand website
Evidence Breakdown
Factory: City-level verified
Website claim: Yes
History: Established
Overseas lines: None known
Studio reference in-ear earphone with flat frequency response for accurate audio monitoring. Designed in Elk Grove Village, Illinois. Single balanced armature driver, 35-42 dB noise isolation.
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Etymotic ER4SR Studio Reference Earphone
77% American Score