How many drivers per ear piece are there?

From the manufacturer's website. "Using a single Balanced Armature (BA) driver allows for extremely accurate IEM without the added complexity of crossovers, and helps keep the aluminum body small and slim." So that means 1/ear to me.

I have been using Etymotic mk5 phones for a long time... would these have a similar level of comfort, or perhaps be more comfortable?

The ER3SE earphones are as comfortable as your choice of earplugs. You have a lot of options including those from other vendors. I have seen the three-lobe models, two-lobe models, foam, and made-to-order custom-fit earplugs. Personally, I found the two-lobe earplugs to be comfortable and Westone makes a very comfortable custom-fit earplug that will last for several years. If price is not a problem, I highly recommend the Westone made-to-order earplugs for the ER3SE. They provide the most comfort and the best noise isolation.

Can the main detachable peice be replaced (not the detachable foam part but the main driver)? I'm getting low volume on one side.

With low sound on one side, the first thing to do would be to replace the filter. It's probably clocked with earwax. They're replaceable and that's what they're there for. Otherwise, when I sent in a pair of earphones, they replaced the earpiece/driver on one side.

Are these good for listening to music through my phone? Or are these just made for studios?

I use them with my phone all the time. They are really good at blocking the outside noise. I love them when I'm flying.

Er3se Studio Edition Earphone Black

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Description

🎶 Hear every detail, miss nothing — the audiophile’s secret weapon.

ALL DAY COMFORT FIT - Optimized for deep insertion with foam or silicone tips, designed for marathon listening sessions without fatigue.
MODULAR CONVENIENT - Detachable reinforced cables with gold-plated 3.5mm jack ensure easy replacement and premium connectivity.
ELITE NOISE ISOLATION - Block out distractions with up to 42dB passive noise isolation—your personal sound sanctuary.
DURABLE PRECISION BUILD - Machined anodized aluminum shells combine lightweight comfort with rugged durability.
PURE STUDIO GRADE SOUND - Experience uncolored, flat frequency response tuned for true-to-life audio accuracy.

The ER3SE Studio Edition Earphones deliver professional-grade, neutral sound with a single balanced armature driver and precision-machined metal bodies. Offering up to 42dB passive noise isolation via foam tips, these wired in-ear monitors feature detachable gold-plated cables with MMCX connectors for durability and easy maintenance. Ideal for audio engineers, musicians, and discerning listeners seeking pure, uncolored audio reproduction in a sleek, comfortable design.

Specifications

ASIN	B07665KVD1
Additional Features	Etymotic designs products to measure, protect and improve hearing, and enhance the listening experience of music lovers everywhere. Audio engineers, musicians and audiologists at Etymotic have generated over 100 patents issued and pending.
Age Range Description	Adult
Antenna Location	Music, Recording
Audio Driver Size	6 Millimeters
Audio Driver Type	Balanced Armature Driver
Best Sellers Rank	#52,916 in Electronics ( See Top 100 in Electronics ) #2,679 in Earbud & In-Ear Headphones
Brand Name	Etymotic
Built-In Media	Headphones, case, tip pack, manual
Cable Features	Detachable
Carrying Case Color	Black
Carrying Case Weight	150 Grams
Color	Black
Compatible Devices	Cellphones
Connectivity Technology	Wired
Control Method	Remote
Control Type	Media Control
Customer Package Type	Standard Packaging
Customer Reviews	4.1 4.1 out of 5 stars (326)
Earpiece Shape	Rounded Tip
Enclosure Material	Metal
Frequency Range	20 Hz - 16 kHz
Global Trade Identification Number	00846430002104
Headphone Folding Features	In Ear
Headphone Jack	3.5 mm Jack
Headphones Ear Placement	In Ear
Impedance	22 Ohms
Is Autographed	No
Item Type Name	ER3SE Studio Edition In-Ear Earphones
Item Weight	0.02 Kilograms
Manufacturer	Etymotic Research
Model Name	ER3SE
Model Number	ER3SE
Noise Control	Sound Isolation
Number of Items	1
Specific Uses For Product	Studio
Theme	Audio Engineering
UPC	846430002104
Unit Count	1.0 Count
Warranty Description	2 Years
Water Resistance Level	Not Water Resistant

Reviews

J**E

5.06.2022

C**O

7.02.2019

A**R

5.09.2025

A**.

9.07.2023

T**M

27.02.2022

C**S

23.02.2020

S**B

22.06.2025

B**N

14.02.2022

M**O

11.03.2023

A**R

9.08.2023

ア**本

17.09.2025

L**N

30.08.2019

P**S

23.04.2024

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ER3SE Studio Edition Earphone,Black

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