100%
Koss Porta Pro On-Ear Headphones with Case
by Koss— Made in Milwaukee, WI
Verified American Made
American Score
86% — High
Why not 100%? Brand produces some items overseas; score reflects USA-specific verification
This brand makes some products overseas. This specific product is verified USA-made.
Manufactured in Milwaukee, WI
Manufacturing in USA since 1958Verified through 3 independent sources
- Known factory location
- Brand website
- Product listing (Milwaukee, Wisconsin)
Evidence Breakdown
Factory: City-level verified
Website claim: Yes
History: 20+ years
Overseas lines: Some products
This brand also produces some products overseas. Only verified USA-made items are listed here.
See all products made in WisconsinIconic open-air on-ear headphones from Koss, made in Milwaukee, Wisconsin since 1984. Lightweight collapsible design with Temporal Pressure Gradient drivers delivering dynamic sound. Lifetime warranty included.
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Koss Porta Pro On-Ear Headphones with Case
86% American Score