---
product_id: 256211074
title: "Er4Sr Studio Reference Precision Matched In-Ear Earphones (Detachable Balanced Armature Drivers, Noise Isolating, High Fidelity, World Leader Response Accuracy), Wired"
brand: "etymotic research"
price: "€ 416.92"
currency: EUR
in_stock: false
reviews_count: 6
url: https://www.desertcart.hr/products/256211074-er4sr-studio-reference-precision-matched-in-ear-earphones-detachable-balanced
store_origin: HR
region: Croatia
---

# 1 dB channel matching precision 35-42 dB noise isolation 5 ft braided detachable MMCX cable Er4Sr Studio Reference Precision Matched In-Ear Earphones (Detachable Balanced Armature Drivers, Noise Isolating, High Fidelity, World Leader Response Accuracy), Wired

**Brand:** etymotic research
**Price:** € 416.92
**Availability:** ❌ Out of Stock

## Summary

> 🎶 Hear every detail, miss nothing — the ultimate in-ear reference for pros who demand perfection.

## Quick Answers

- **What is this?** Er4Sr Studio Reference Precision Matched In-Ear Earphones (Detachable Balanced Armature Drivers, Noise Isolating, High Fidelity, World Leader Response Accuracy), Wired by etymotic research
- **How much does it cost?** € 416.92 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/256211074-er4sr-studio-reference-precision-matched-in-ear-earphones-detachable-balanced)

## Best For

- etymotic research enthusiasts

## Why This Product

- Trusted etymotic research brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable Elegance:** Sleek anodized aluminum body built to outlast your busiest days.
- • **Customizable Comfort:** Includes multiple ACCU-Fit eartips and replaceable filters for a perfect, personalized fit.
- • **Studio-Grade Precision:** Balanced armature drivers matched within 1 dB for flawless audio accuracy.
- • **Unmatched Noise Isolation:** Up to 42 dB sound isolation to immerse you fully in your work or music.
- • **Plug & Play Professionalism:** 5 ft reinforced detachable MMCX cable with media controls for seamless wired connectivity.

## Overview

The Etymotic Research ER4SR are precision-engineered in-ear monitors featuring balanced armature drivers matched within 1 dB for studio-level accuracy. With up to 42 dB noise isolation, a durable anodized aluminum body, and a 5 ft braided detachable MMCX cable, these wired earphones deliver unparalleled high-fidelity sound and professional-grade durability. Designed for audiophiles and sound engineers, they come with multiple eartips, replaceable filters, and a channel-matching compliance certificate, making them the definitive choice for critical listening and professional monitoring.

## Description

Product Description The Etymotic Research Er4Sr Is The New Reference Standard In-Ear Monitor For Those Who Demand Nothing Less Than The Highest Fidelity. The Next Generation Of Our Long Revered Flagship In-Ear Earphone, The Er4S, The Er4Sr Delivers Increased Accuracy With Greater Sensitivity. Like Its Predecessor, The Er4Sr Channels Are Matched To Within An Industry-Leading 1Db Across All Frequencies From 100Hz To 10Khz. The New Er4Sr Incorporates Sleek, Anodized And Laser-Etched Aluminum Bodies And Braided, Reinforced 5 Ft. Detachable Cables. The Er4Sr Is A Must Have For Discerning Engineers, Audiophiles, And Consumers Wanting The Most Accurate In-Ear Monitor Available. Included With Every Pair Of Er4Sr Earphones Is An Industry-Exclusive Channel Matching Compliance Graph Signed By The Etymotic Engineer Who Precision Matched And Custom Tuned The Balanced-Armature Drivers. Every Pair Of Er4Sr Earphones Is Assembled And Tuned In The United States.Transducers : High Performance, Balanced Armature Micro-Drivers. Set Contains: Etymotic ER4-SR Studio Reference Earphones 6.35mm stereo adaptor Assortment of ACCU-Fit eartips Filter changing tool and replacement ACCU-Filter wax filters Channel-matching compliance graph Shirt clip Airline adaptor Travel pouch Storage box

Review: Unfortunately didn’t like - They are very neutral and provide exceptional noise isolation which I like. But the sound is not satisfactory for me, because it sounds narrow and sibilant. It’s the first time I complain about sibilance ion my life having many high end headphones.
Review: Etymotic ER-4SR Studio Reference Earphone Quick Review by mark2410 Brief: The king is dead, long live the king!!! Price: £330 or in the US US$350 Specifications: Frequency Response 20 Hz-16 kHz, Accuracy Score 4SR (92%), Transducers High performance balanced armature micro-drivers, Noise Isolation 35-42 dB, Impedance (@1 kHz) 4XR (45 Ohms), Sensitivity (@1 kHz), SPL at 0.1V 4XR (98 dB), Maximum Output (SPL) 122 dB, Cable 5 ft. Detachable, Warranty 2 years Accessories: A bunch of tips and huge that case are mostly useless. Order a usable case and either some small olives or Comply’s when you buy them. Build Quality: Ety’s had a stellar build quality reputation when they were plastic, these are now metal and will likely out live you. Isolation: Ety’s are the kings of isolation, they are rated at up-to 42dB reduction. No other earphone or headphone can match them nor can any earplugs. The things you hear are because the sounds have travelled through your jaw rather than in your ears. Microphonics: If you wear them up nothing but they are angled so you probably will want to wear down and the chin slider and shirt clip will help there. Comfort/Fit: A contentious issue. The included tips all suck, pick up some small olives or Comply’s and then with a little lick for lubrication you can insert them. You will feel violated the first time you do this. However once you get used to the strangeness of it they are actually comfortable. I can wear them for hours and hours with no issues so long as I don’t have to repeatedly take them out. That is very wearing on the ear. Aesthetics: They look not bad, though they sit entirely internally in use so who cares, no one can see them. Sound: Well the old ER4 was the reference king. A paragon of neutrality and these are the same. They are slightly more easy to make sound their best as with the lower impedance over the ER-4S you can get a sound quality improvement if you insist on using an inadequate source. Yet I really wonder how many people did that? Were there many ER-4P users out there clamouring for the refinement of the S but weren’t willing to add in the impedance? Still if we ignore that then this is the same sound, in a slightly nicer housing. The old ER4 did look a bit naff and these look much more sleek. Of course since they are brain implants no one can actually see them in use sooooo, yeah who cares? Their audio is as it always has been, largely perfect. They are massively detailed, insanely detailed compared to the likes of most earphones. These are less devices to listen to music than they are an acoustic microscope made to analyse it. If you want all of the details, yey, you have found pretty much the perfect IEM with which to do so. Note that they will expose all flaws so feed them crap at your own peril, they can ruin formerly loved tracks by exposing its flaws you hadn’t noticed before. Value: Wallet ouchy but they are paragons. They are as reference grade as the old ER4 has been for decades and these will be for decades going forward. You want that, and something with a build that means you could do it with one pair, your wallets taking a short term pounding. Pro’s: They are the ultimate in reference quality perfection. Ultimate isolation. Con’s: The XR can do all these can but with a smidge more bass.

## Features

- High performance balanced Armature drivers are precision matched to within 1 dB
- Sleek, anodized, laser-etched aluminum body
- Braided, reinforced 5ft detachable MMCX cables
- 35-42 dB of noise isolation with a max output of 122 dB
- Precision machined metal bodies with anodized finish

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01GW785KQ |
| Age range (description) | Adult |
| Best Sellers Rank | #70,504 in Electronics ( See Top 100 in Electronics ) #3,649 in In-Ear Headphones |
| Cable feature | Detachable |
| Compatible devices | Cellphones |
| Connectivity technology | Wired |
| Control method | Remote |
| Control type | Media Control |
| Headphone jack | Detachable Connector |
| Included components | In Ear Monitors Detachable, 5 ft. cable with 3.5mm gold plated stereo plug Assortment of eartips: 4 Dual Flange Silicone Pairs: S, M, L, XL. 2 Triple Flange Pairs: Standard and Large. and 2 Foam Pairs: Standard Filter removal tool and replacement filters to protect the BA drivers from ear wax Shirt clip Zippered storage case Channel-Matching Compliance certificate |
| Item model number | ER4SR |
| Item weight | 0.2 Pounds |
| Manufacturer | Etymotic Research |
| Material | Aluminum Metal |
| Model name | ER4SR |
| Noise control | Sound Isolation |
| Number of Items | 1 |
| Package type | Standard Packaging |
| Product Dimensions | 81.28 x 0.64 x 0.64 cm; 90.72 g |
| Recommended uses for product | Music |
| Sensitivity | 45 Ohm |
| Specific uses for product | Professional monitoring, Audiophile listening |
| Style | High-Fidelity |
| Water resistance level | Water Resistant |

## Product Details

- **Brand:** Etymotic Research
- **Colour:** Black
- **Ear placement:** In Ear
- **Form factor:** In Ear
- **Impedance:** 45 Ohms

## Images

![Er4Sr Studio Reference Precision Matched In-Ear Earphones (Detachable Balanced Armature Drivers, Noise Isolating, High Fidelity, World Leader Response Accuracy), Wired - Image 1](https://m.media-amazon.com/images/I/51BgZ6-aeML.jpg)

## Questions & Answers

**Q: How does the er4sr compare to the older er4s / er4p?**
A: While both the HF and ER4 series use a balanced armature driver, the ER4S is precision matched to within 1 dB. Performance certificate is included with the ER4 series.The new ER4SR uses the same high performance drivers as the original ER4S. Both are designed to produce the most accurate sound reproduction possible. They are often used by studio recording engineers (S is for Studio Reference). The original ER4P and ER4P-T were designed for audio engineers and audiophiles on the go (P is for portable). They are tuned to maximize sound from portable music players. The new ER4SR will give you the sound accuracy you expect from the original ER4S or P with the added benefit of removable cables. If you prefer a little more in the lower frequencies, go for the ER4XR--Extended Range.Please feel to reach out to our customer service department at 888-389-6684 if you have further questions.Etymotic Research

**Q: Are these flat/true for mixing on the go? If not which ones?**
A: These earbuds are true and great for iPod iPhone use. Good highs and mids but a little tinty in the bass end. Nice tight buds if you use the ety cones that are supplied. Also they are number one in noise reduction!! Work or play they won’t fall out. 8 of 10!

**Q: What is the difference between this xr and the sr version?  thanks all!**
A: Thanks very much for your question. The  XR has a modest bass boost and the SR are completely flat. World Wide Stereo is 39 years old and a proud authorized Etymotic Research dealer.

**Q: Do the headphones sold through amazon warehouse deals still come with the etymotic research warranty?**
A: No. WiredforLess is correct. Only NEW purchases made from an AUTHORIZED Etymotic reseller will be eligible for warranty coverage. Amazon itself is NOT an authorized reseller and warehouse deals fall under used product.Not all sellers currently operating on Amazon or other online sites are authorized. If you are not certain whether or not a reseller is authorized, you are advised to first call Etymotic's Customer Service line at 888-389-6684.Etymotic Research

## Customer Reviews

### ⭐⭐⭐ Unfortunately didn’t like
*by A***. on 25 September 2023*

They are very neutral and provide exceptional noise isolation which I like. But the sound is not satisfactory for me, because it sounds narrow and sibilant. It’s the first time I complain about sibilance ion my life having many high end headphones.

### ⭐⭐⭐⭐⭐ Review
*by M***0 on 10 November 2016*

Etymotic ER-4SR Studio Reference Earphone Quick Review by mark2410 Brief: The king is dead, long live the king!!! Price: £330 or in the US US$350 Specifications: Frequency Response 20 Hz-16 kHz, Accuracy Score 4SR (92%), Transducers High performance balanced armature micro-drivers, Noise Isolation 35-42 dB, Impedance (@1 kHz) 4XR (45 Ohms), Sensitivity (@1 kHz), SPL at 0.1V 4XR (98 dB), Maximum Output (SPL) 122 dB, Cable 5 ft. Detachable, Warranty 2 years Accessories: A bunch of tips and huge that case are mostly useless. Order a usable case and either some small olives or Comply’s when you buy them. Build Quality: Ety’s had a stellar build quality reputation when they were plastic, these are now metal and will likely out live you. Isolation: Ety’s are the kings of isolation, they are rated at up-to 42dB reduction. No other earphone or headphone can match them nor can any earplugs. The things you hear are because the sounds have travelled through your jaw rather than in your ears. Microphonics: If you wear them up nothing but they are angled so you probably will want to wear down and the chin slider and shirt clip will help there. Comfort/Fit: A contentious issue. The included tips all suck, pick up some small olives or Comply’s and then with a little lick for lubrication you can insert them. You will feel violated the first time you do this. However once you get used to the strangeness of it they are actually comfortable. I can wear them for hours and hours with no issues so long as I don’t have to repeatedly take them out. That is very wearing on the ear. Aesthetics: They look not bad, though they sit entirely internally in use so who cares, no one can see them. Sound: Well the old ER4 was the reference king. A paragon of neutrality and these are the same. They are slightly more easy to make sound their best as with the lower impedance over the ER-4S you can get a sound quality improvement if you insist on using an inadequate source. Yet I really wonder how many people did that? Were there many ER-4P users out there clamouring for the refinement of the S but weren’t willing to add in the impedance? Still if we ignore that then this is the same sound, in a slightly nicer housing. The old ER4 did look a bit naff and these look much more sleek. Of course since they are brain implants no one can actually see them in use sooooo, yeah who cares? Their audio is as it always has been, largely perfect. They are massively detailed, insanely detailed compared to the likes of most earphones. These are less devices to listen to music than they are an acoustic microscope made to analyse it. If you want all of the details, yey, you have found pretty much the perfect IEM with which to do so. Note that they will expose all flaws so feed them crap at your own peril, they can ruin formerly loved tracks by exposing its flaws you hadn’t noticed before. Value: Wallet ouchy but they are paragons. They are as reference grade as the old ER4 has been for decades and these will be for decades going forward. You want that, and something with a build that means you could do it with one pair, your wallets taking a short term pounding. Pro’s: They are the ultimate in reference quality perfection. Ultimate isolation. Con’s: The XR can do all these can but with a smidge more bass.

### ⭐⭐⭐⭐⭐ Review
*by N***R on 26 November 2025*

These might be the best IEMs I’ve tried—really flat frequency response, super accurate, and just perfect for anyone who wants that studio-reference sound. No extra bass boost needed—just pure, enjoyable, high-fidelity audio. I’d totally recommend the Etymotic ER4-SR.

## Frequently Bought Together

- Etymotic ER4SR Studio Reference Earphone,Black
- Etymotic Research Tuning Kit for ER Series Earphone with 5 Different Filters (ER-DAMPER5PACK)
- Etymotic ER2XR Extended Response Earphone, Multicolored

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-20*