ER4-XR vs Campfire Audio Holocene
The Holocene's sensitivity is 105 dB against the ER4-XR's 98 dB, its impedance 32Ω against 45Ω, and its high-frequency extension 20 kHz against 16 kHz. Both share low-frequency extension (20 Hz).
AI-generated product photo — not official manufacturer imagery.
ER4-XR
Etymotic ResearchHeadphonesIn-Ear Headphones
Estimated price (community-sourced)
$130 - $310
Around — community and catalog average, updates slowly
About the ER4-XR
The Etymotic Research ER4-XR is a high-end in-ear monitor designed for audiophiles and music enthusiasts. It features a single Balanced Armature (BA) driver, which provides accurate sound reproduction without the complexity of crossovers. The ER4-XR is known for its extended bass response, offering a slight rise in bass frequencies compared to its counterpart, the ER4SR. The earphones are crafted from CNC-machined anodized aluminum, ensuring durability and a sleek design. They offer excellent passive noise isolation, with attenuation ranging from 35 to 42 dB, depending on the ear tips used. The ER4-XR includes a user-replaceable cable for improved longevity and durability.
Specifications
Transducer Specifications
Driver and acoustic performance characteristics
- Sensitivity
- 98 dB SPL @ 1W/1m
- Impedance
- 45Ω
- Frequency Response
- 20 Hz - 16 kHz
Headphone Design
Headphone driver and design characteristics
- Type
- in-ear
- Driver Type
- balanced_armature
- Open/Closed Back
- Closed Back
Key Specifications
Sensitivity: 98 dB
Impedance: 45Ω
Frequency: 20-16000 Hz
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions