
Etymotic ER3SE High-Sensitivity In-Ear Monitors (Studio Edition)
Etymotic - ER3SE Studio Edition In-Ear Isolating Earphones with Detachable Cable
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High-Sensitivity In-Ear Monitors
Etymotic - ER3SE (Studio Edition)

clear, accurate sound using high performance dynamic driversThe Etymotic ER3SE's are the highest-sensitivity single driver in-ear monitor. The IEM shells are made using anodized aluminum, CNC machined with incredibly tight tolerances. Using a single Balanced Armature (BA) driver allows for extremely accurate IEM without the added complexity of crossovers, whilst helping keep the aluminum body small and slim. A user-replaceable cable is also included.
Etymotic IEMs are known around the world for their class-leading passive isolation, providing 35-42 dB attenuation (depending on eartips used and the depth of insertion). For comparison, most custom IEMs provide around 25-28dB attenuation and foam ear plugs attenuate up to 32 dB. The ER3SE in-ear monitors are perfect for sound engineers, audiophiles, and consumers on a budget, in search of in-ear monitors that are easy to drive while offering accurate audio reproduction.
22 ΩImpedance
20 Hz – 16 kHzFrequency Response
102 dBMax SPL
What's Included?
• Etymotic ER3SE In Ear Monitors
• Detachable 4 ft. cable with 3.5mm gold plated stereo plug
• Assortment of eartips
• Filter removal tool and replacement filters to protect the BA drivers from ear wax
• Shirt clip
• Zippered storage case
• Channel-Matching Compliance certificate 2
Flat Frequency Response Curve

designed by expertsEtymotic’s target frequency response graph displays a “perceptibly flat” frequency response. Their goal is to have a flat frequency response curve when the music reaches your eardrums. To achieve that, the resonance inside the average ear canal needs to be accounted for, as IEMs bypass the outer ear structure. The result is the need for higher SPL in the 2-5k region (lower treble) for compensating said resonance, which is the reason for the “hump” in that region.
The target curve that Etymotic is using for tuning their IEMs changes slightly from the Harmon preference curve. It was developed in-house over 20 years ago, leveraging on Etymotic's human hearing expertise and acoustics research.
Accurate Earphone Reproduction

every element consideredWhen tuning in-ear monitors to accurately reproduce a recording of a live performance, the goal is for the sound to be identical to that of the original performance. To achieve this, the acoustic properties of the ear must be considered.
The acoustic resonance and horn effects of the ear change a flat audio signal entering the open ear into sound with a (2700 Hz) high-frequency boost, which is the same response heard at the eardrum in a typical ear. That is the reason for the “hump” in the frequency response, which assures the eardrums perceive a perfectly flat frequency response for all frequencies.
The Tech Spec
Features | Specification | Frequency Response | 20 Hz – 16 kHz |
---|---|
Transducers | Single high-performance balanced armature per channel |
Noise Isolation | 35dB using silicone ear tips, 42dB using foam ear tips |
Impedance | 22 Ohms @ 1kHz |
Sensitivity | 102 dB @ 1kHz, 1mW |
Maximum Output (SPL) | 120 dB |
Cable | Detachable 4 ft cable with MMCX connectors |
User Replaceable ACCU-Filters | Yes |
Included Eartips | 4 Dual Flange Silicone Pairs: S, M, L, XL. 2 Triple Flange Pairs: Standard and Large. and 2 Foam Pairs: Standard |
Warranty | 2 Years |
Custom-Fit Option | Yes |