---
product_id: 212870877
title: "Etymotic ER Series 2.5mm Balanced Cable, Black"
brand: "etymotic research"
price: "$U8227"
currency: UYU
in_stock: true
reviews_count: 10
category: "Etymotic Research"
url: https://www.desertcart.uy/products/212870877-etymotic-er-series-2-5mm-balanced-cable-black
store_origin: UY
region: Uruguay
---

# Discrete signal paths for noise-free sound 2.5mm balanced audio for superior clarity MMCX connector with secure locking key Etymotic ER Series 2.5mm Balanced Cable, Black

**Brand:** etymotic research
**Price:** $U8227
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your sound game with precision-balanced clarity!

## Quick Answers

- **What is this?** Etymotic ER Series 2.5mm Balanced Cable, Black by etymotic research
- **How much does it cost?** $U8227 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/212870877-etymotic-er-series-2-5mm-balanced-cable-black)

## 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

- • **Sleek, Durable Design:** Black finish combines style and resilience for everyday professional use.
- • **Optimized for High-End Gear:** Unlock the full potential of your digital audio player or headphone amp supporting 2.5mm balanced output.
- • **Secure MMCX Locking Connector:** Stay worry-free with a cable that locks firmly in place, protecting your investment.
- • **Universal Etymotic ER Compatibility:** Seamlessly upgrade any ER series earphones with MMCX connectors.
- • **Audiophile-Grade Balanced Connection:** Experience crystal-clear sound with discrete left and right signals.

## Overview

The Etymotic ER Series 2.5mm Balanced Cable is a premium upgrade cable designed for Etymotic ER earphones with MMCX connectors. Featuring a secure locking key and discrete left/right signal paths, it delivers superior audio clarity when paired with compatible digital audio players or headphone amplifiers supporting 2.5mm balanced output.

## Description

The Etymotic black 2.5mm balanced cable is a cable upgrade for the entire Etymotic ER Earphone Series that utilizes an MMCX connector with a special “key” that helps lock the cable in place and protects the integrity of the connector.

Review: Worth it - A good upgrade. Lets the headphone amp output at full power. Also, seems more robust that the regular cable and less likely to get tangled.
Review: Improvement over stock cable - The cable is an audible improvement over the standard 3.5mm one that comes with earphones - this was clear the moment I started using it. My player is a high resolution music player.

## Features

- 2.5mm Balanced Cable
- Each side of the earphone pair will get a discrete signal from the player or headphone amplifier you are using
- Compatible with all Etymotic ER series earphones that have the MMCX connector
- Please note that you will need a special Digital Audio Player or headphone amp that supports the 2.5mm balanced protocol in order to take full advantage of the Etymotic balanced cable

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07QRF4QFW |
| Best Sellers Rank | #210,075 in Electronics ( See Top 100 in Electronics ) #1,075 in Headphone Extension Cords |
| Brand | Etymotic |
| Cable Type | Balanced |
| Color | Black |
| Compatible Devices | Headphone |
| Compatible Phone Models | Apple iPhone XR |
| Connector Gender | Male-to-Male |
| Connector Type | 2.5mm Balanced |
| Date First Available | April 11, 2019 |
| Indoor/Outdoor Usage | Indoor, Outdoor |
| Item Weight | 1.12 ounces |
| Item model number | OO1005 |
| Manufacturer | Etymotic Research |
| Model Name | OO1005 |
| Number of Items | 1 |
| Number of Pins | 3 |
| Recommended Uses For Product | Audio |
| Shape | Round |
| Special Feature | Lightweight |
| UPC | 846430002234 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Etymotic Research
- **Connector type:** 2.5mm Balanced
- **Cable type:** Balanced
- **Compatible devices:** Headphone
- **Special feature:** Lightweight

## Images

![Etymotic ER Series 2.5mm Balanced Cable, Black - Image 1](https://m.media-amazon.com/images/I/515svqSBa3L.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worth it
*by A***L on 26 August 2025*

A good upgrade. Lets the headphone amp output at full power. Also, seems more robust that the regular cable and less likely to get tangled.

### ⭐⭐⭐⭐⭐ Improvement over stock cable
*by M***S on 25 January 2025*

The cable is an audible improvement over the standard 3.5mm one that comes with earphones - this was clear the moment I started using it. My player is a high resolution music player.

### ⭐⭐⭐⭐⭐ Makes A Noticeable Improvement!
*by ✅***R on 19 July 2024*

Compared to the 3.5mm cable the balanced 2.5mm cable has a noticeable improvement to audio quality when powered from a decent amp (on Etymotic ER4SRs). I was able to test using an identical setup as my amp supports both 3.5 & 2.5 output therefore the only change was the cable. Very happy with my purchase.

## Frequently Bought Together

- Etymotic Research ER Series 2.5mm Balanced Cable, Black, Wired
- Etymotic Research Tuning Kit for ER Series Earphone with 5 Different Filters (ER-DAMPER5PACK)
- Etymotic Research Er4Sr Studio Reference Precision Matched In-Ear Earphones (Detachable Balanced Armature Drivers, Noise Isolating, High Fidelity, World Leader Response Accuracy), Wired

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-21*