AudioChainsDB
Etymotic

ER3XR

headphones

$180

Used market: $140*

Manufacturer datasheet

Specifications

3 of 6 values have a recorded source
Connector
MMCX, 3.5 mm plug·
Form Factor
In-Ear·
Impedance ohms
22✓
Transducer Type
Balanced Armature·
Detachable Cable
yes·
Sensitivity dB mW
102✓

Expert Audio Engineering Commentary

Tonal Profile

A single balanced armature per channel, matched at 1 kHz. One driver and no crossover is the reason this armature design does not misbehave with a slightly resistive source — the pathological case is multiple armatures behind a passive network, not a single one.

* Estimated with the depreciation fallback (~78% retained value). · checked on 8/5/2026