ER4SR Studio Reference Earphone
Etymotic Research$290-$320
Features
- Single balanced armature driver, channel-matched to within 1 dB from 100 Hz to 10 kHz
- 35–42 dB of passive noise isolation via deep-insertion triple-flange ear tips
- Assembled and tuned in Etymotic's Elk Grove Village, Illinois laboratory
- Kevlar-reinforced detachable MMCX cable
- Ships with a signed channel-matching compliance graph from the Etymotic engineer who matched the drivers
Description
The ER4SR is the current flagship of Etymotic's 40-year ER-4 lineage — a single balanced armature earphone assembled and channel-balanced to within 1 dB at the Elk Grove Village, Illinois lab. Every pair ships with a signed compliance graph from the Etymotic engineer who matched the drivers. The deep-insertion fit delivers 35–42 dB of passive noise isolation without active electronics.
Made in the USA
Assembled and channel-balanced to within 1 dB at Etymotic Research's Elk Grove Village, IL facility.
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