Etymotic ER4SR
In-Ear Monitor (IEM)
Headphones$310Manufacturer list price
Specifications
- Type
- Headphones
- Description
- In-Ear Monitor (IEM)
- Topology
- balanced-armature (single)
- Signal path
- Analog
- Channels
- 2
- Channel format
- Stereo
- Form factor
- in-ear monitor
- Connection
- 3.5mm TRS (passive)
- Powered
- No
- Drivers
- Single balanced-armature driver per channel
- Frequency response
- 20 Hz - 16 kHz
- Max SPL
- 122 dB
- Sensitivity
- 98 dB @ 1kHz, 1mW
- Impedance (Ω)
- 45
- Back design
- in-ear (deep insertion)
- Introduced
- 2016
- Country of manufacture
- USA
Details
I/O: Detachable 5 ft twisted cable with MMCX connectors, terminated in 3.5mm gold-plated stereo plug
Notable use: Studio Reference tuning; positioned as successor to the long-running ER4S/ER4P microPro for critical listening and reference monitoring
Notes: Single BA per channel (not dual). Channels matched within 1dB, 100Hz-10kHz, per-unit compliance certificate included. Deep-insertion foam/silicone tips give 35dB (silicone)/42dB (foam) passive isolation. Price is MSRP per etymotic.com. Country of manufacture (USA / assembled and tuned) stated in retailer-mirrored Etymotic copy (Amazon/Full Compass) but not visibly rendered on the live etymotic.com page at fetch time; included with moderate confidence. Catalog EXCLUDES Etymotic hearing-protection earplugs (ER20/ER20XS, MusicPRO, GunSport-PRO, ETY-Plugs) and hearing-test/research products as out of scope (not audio-reproduction devices). Also excluded here: ER4P/ER4 microPro line (discontinued ~2021) and EVO multi-driver earphone (removed from etymotic.com current catalog ~mid-2024, appears discontinued) — flagged once for the whole brand.