---
product_id: 65124045
title: "CX 300 II Precision Noise Isolating Ear-canal Phones, Black"
brand: "sennheiser"
price: "$50.70"
currency: USD
in_stock: true
reviews_count: 13
category: "Sennheiser"
url: https://www.desertcart.us/products/65124045-cx-300-ii-precision-noise-isolating-ear-canal-phones-black
store_origin: US
region: United States of America
---

# 16Ω impedance for crisp sound 113 dB sensitivity for powerful audio Noise isolating fit blocks ambient sound CX 300 II Precision Noise Isolating Ear-canal Phones, Black

**Brand:** sennheiser
**Price:** $50.70
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your sound game with precision and style — don’t just listen, experience it!

## Quick Answers

- **What is this?** CX 300 II Precision Noise Isolating Ear-canal Phones, Black by sennheiser
- **How much does it cost?** $50.70 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/65124045-cx-300-ii-precision-noise-isolating-ear-canal-phones-black)

## Best For

- sennheiser enthusiasts

## Why This Product

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

## Key Features

- • **Custom Comfort Fit:** Three sizes of ear adapters ensure a personalized seal that doubles as noise isolation—your private concert on the go.
- • **Portable Protection:** Includes a sleek, high-quality carry pouch to keep your headphones safe and stylish wherever you roam.
- • **Tangle-Free Freedom:** Asymmetrical cable design keeps wires neat and hassle-free, perfect for busy commutes or workouts.
- • **Bass-Driven Precision:** Dynamic drivers deliver rich, immersive stereo sound that elevates every playlist.
- • **Universal Compatibility:** Optimized for all your devices—from iPhones to gaming consoles—seamlessly connect and play without limits.

## Overview

The Sennheiser CX 300 II Precision ear-canal phones combine high-quality dynamic drivers with a noise-isolating ergonomic fit, delivering powerful bass-driven stereo sound at 113 dB sensitivity and 16Ω impedance. Designed with an asymmetrical, tangle-free cable and multiple ear adapter sizes, they offer personalized comfort and superior ambient noise attenuation. Perfectly portable with a premium carry pouch, these wired headphones are compatible with a wide range of devices, making them an essential audio upgrade for professionals and audiophiles alike.

## Description

From the manufacturer Sennheiser CX 300 II Overview Offering a powerful, bass-driven stereo sound with greater clarity and improved dynamics are the CX 300-II Precision Black ear-canal phones. The various sizes of ear adapters (S/M/L sizes) provided in the package allow for a personalised fit as well as a high passive attenuation of ambient noise. Also, the asymmetrical cable design ensures a high wearing comfort as you listen on the go. Features High-quality dynamic speaker systems for powerful, bass-driven stereo sound Excellent fit in the ear canals and high attenuation of ambient noise (ear adapters in different sizes included) Convenient carrying pouch included Optimised for MP3, iPod, iPhone, CD players and portable gaming systems (iPod and iPhone are trademarks of Apple Inc. registered in the U.S. and other countries) Asymmetrical cable

Review: Best in-ear headphones I have ever owned! - Best in ear headphones I have ever owned - I'm a big fan of Sennheiser, they're a 68 year old german audio company all about sound rather than brand, unlike *cough* Beats, Monster, SkullCandy, Razer and even Bose nowadays. There's only a select few wearable audio companies I trust and Sennheiser are one of them. I'm on my second pair of these, thanks to a certain playful moggy and have a third pair unopened that I purchased in a sale. These headphones do everything right, they feel extremely well made for a pair of in-ear headphones and are amazingly comfortable, even for long listening periods. These headphones have a design to where one cable from the Y junction is around twice as long as the other, this allows for the headphones to go around the back of your neck thus leaving less cable to hang in front of you, it also aids in keeping them in place while doing things such as running or gym work. the headphone units themselves are also very comfortable and once in do not protrude out of your ears like a lot of in-ear headphones giving them a visually satisfying look. As for the sound, they are just absolutely brilliant and suit a wide range of music from classical to house, to rock and metal to electro and from hardstyle to R&B, and many many more genres. The highs are perfect and are crystal clear, the mids are very good and don't clash with the bass, allowing them to not be washed out by the bass. the bass is great, lows sound smooth but can tremble depending on the type of music you listen to, making the headphones great also for watching movies on the go or at home. I personally use these headphones with a range of devices, such as the following; iPod classic, iPod touch, iPod nano, iPhone, iPad, MacBook and a custom PC. If you intend to use these headphones with a more powerful device such as a laptop or desktop PC, I would HIGHLY recommend turning the volume right down as these headphones are very sensitive and will blow craters in the side of your head if you're not careful. These headphones come with three different sizes of buds and I'd recommend you try them all for a short period of time to find which one suits you best, ideally with these headphones to get the best results you want them as far in as possible without discomfort. I personally use the small size of bud and push the headphones in until they make a clicking sound, the clicking sound is the driver of the headphones moving back thus showing you have a good seal. I can't think of anything else to add to this review other than about the little carry pouch they come with which is made of a high quality leatherette and had a satisfying metal closing band which snaps together with a thud. These headphones have outlasted any other that I have owned and are still going strong today. the first pair that my kitten chewed up I managed to fix with a new 3.5mm jack and also still work brilliantly to this day (almost 5 years later after their purchase) I hope this review may help someone :)
Review: Best value for money earphones I have ever had - 3rd time buying, last me about a year and a half each time until the cabling starts to wear away but I used them almost all day everyday for work and personal use. Great sound quality, comfourtable, light and when paried with some audio software like SteelSeries Sonar etc they are also great for gaming, couldn't recommend more for the price.

## Features

- Easy upgrade from standard ear-buds; for those who crave great sound in a compact, portable package
- High-quality dynamic speaker systems for bass-driven stereo sound and durability
- Personalised fit in the ear canals to function as an earplug and high-quality speaker
- Convenient carry pouch included for safe and storage and transport
- Asymmetrical cable reduces tangle and cable clutter

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001EZYMF4 |
| Age Range Description | Adult |
| Antenna Location | Music Listening, Travel |
| Audio Driver Type | Dynamic Driver |
| Best Sellers Rank | 145 in In-Ear Headphones |
| Box Contents | Cable, Eartip |
| Brand | Sennheiser |
| Brand Name | Sennheiser |
| Cable Features | Tangle Free |
| Carrying Case Color | Black |
| Carrying Case Material | Plastic |
| Colour | Black |
| Compatible Devices | Most devices with 3. |
| Control Method | Remote |
| Control Type | Remote Control |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.2 out of 5 stars 9,205 Reviews |
| Ear placement | In Ear |
| Earpiece Shape | In-ear (rounded tip) |
| Enclosure Material | Plastic |
| Form factor | In Ear |
| Frequency Range | 19 - 21000 Hz |
| Global Trade Identification Number | 00039409663202, 00615104120945 |
| Headphone Form Factor | In Ear |
| Headphone Jack | 3.5 mm Jack |
| Headphones Ear Placement | In Ear |
| Impedance | 16 Ohms |
| Is Autographed | No |
| Is Electric | No |
| Item Type Name | Noise Isolating Earphones |
| Item Weight | 80 Grams |
| Manufacturer | Sennheiser |
| Model Name | CX 300 II Precision |
| Model Number | CX300-II |
| Network Connectivity Technology | Wired |
| Noise Control | Sound Isolation |
| Noise control | Sound Isolation |
| Number of Items | 1 |
| Product Features | Noise Isolation |
| Sensitivity | 113 dB |
| Series Number | 2 |
| Specific Uses For Product | Recording, Noise Cancelling, Not for Swimming |
| Style Name | Minimalist |
| UPC | 840929039053 951827399214 615104167414 637452493472 732840729086 615104120945 612957792527 039409663202 628586151048 615104184626 610393620879 039409662298 015104120943 |
| Unit Count | 1.0 count |
| Water Resistance Level | Not Water Resistant |
| Wireless Technology Type | Sans-fil |

## Product Details

- **Brand:** Sennheiser
- **Colour:** Black
- **Connectivity technology:** Wired
- **Ear placement:** In Ear
- **Form factor:** In Ear
- **Headphone jack:** 3.5 mm Jack
- **Impedance:** 16 Ohms
- **Model name:** CX 300 II Precision
- **Noise control:** Sound Isolation
- **Sensitivity:** 113 dB

## Images

![CX 300 II Precision Noise Isolating Ear-canal Phones, Black - Image 1](https://m.media-amazon.com/images/I/41iagyEBILL.jpg)

## Available Options

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

## Questions & Answers

**Q: What is the difference between Sennheiser CX 300 II and Betron RK300 ?**
A: I don't know the Betron, but I own both the SoundMAGIC ES20 and E10 and they are better built than the Sennheiser.  SoundMAGIC cabling is really well made and the earphones themselves are constructed from aluminium.  The Sennheiser's feel a bit cheap and plasticy to me.

**Q: Do they come in the manufacture case as it would if I were to buy it from a store?**
A: Yes it comes in a plastic casing which is very hard to get into lol

**Q: How do you adjust the length of the wire for each individual headphone once they split off?.. The left headphone is far shorter than the right one**
A: Hey Sam, sadly you can't. The idea is that the longer wire goes behind your neck. It stops the headphones getting in the way. Hope this helps.

**Q: Do they leak noise? Being in ear I am hoping they wont. Please help!**
A: Well, if your playing your iPod on full volume without them in your ears, you'd be able to hear the music. But when worn, the sound of anything around you is about half as loud, maybe less. This means you don't have to push the volume much in order to hear NOTHING but your music, at 50% vol you can't hear anything going on around you unless in a "louder-than-usual" environment, I think at 60% ish you get more of a crisp! full sound! anything above that really isn't needed unless your hard of hearing. I've noticed more in the music I've listened to before with these phones so I'd say they keep the sound in your ear when worn, this is possibly supported more so by the fact that half as much sound gets in from the outside.I'm sure anyone who isn't an audiophile who wants best of the best would be satisfied with these earphones, they are better than anything similar for the same price, in my opinion.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best in-ear headphones I have ever owned!
*by J***. on 17 December 2014*

Best in ear headphones I have ever owned - I'm a big fan of Sennheiser, they're a 68 year old german audio company all about sound rather than brand, unlike *cough* Beats, Monster, SkullCandy, Razer and even Bose nowadays. There's only a select few wearable audio companies I trust and Sennheiser are one of them. I'm on my second pair of these, thanks to a certain playful moggy and have a third pair unopened that I purchased in a sale. These headphones do everything right, they feel extremely well made for a pair of in-ear headphones and are amazingly comfortable, even for long listening periods. These headphones have a design to where one cable from the Y junction is around twice as long as the other, this allows for the headphones to go around the back of your neck thus leaving less cable to hang in front of you, it also aids in keeping them in place while doing things such as running or gym work. the headphone units themselves are also very comfortable and once in do not protrude out of your ears like a lot of in-ear headphones giving them a visually satisfying look. As for the sound, they are just absolutely brilliant and suit a wide range of music from classical to house, to rock and metal to electro and from hardstyle to R&B, and many many more genres. The highs are perfect and are crystal clear, the mids are very good and don't clash with the bass, allowing them to not be washed out by the bass. the bass is great, lows sound smooth but can tremble depending on the type of music you listen to, making the headphones great also for watching movies on the go or at home. I personally use these headphones with a range of devices, such as the following; iPod classic, iPod touch, iPod nano, iPhone, iPad, MacBook and a custom PC. If you intend to use these headphones with a more powerful device such as a laptop or desktop PC, I would HIGHLY recommend turning the volume right down as these headphones are very sensitive and will blow craters in the side of your head if you're not careful. These headphones come with three different sizes of buds and I'd recommend you try them all for a short period of time to find which one suits you best, ideally with these headphones to get the best results you want them as far in as possible without discomfort. I personally use the small size of bud and push the headphones in until they make a clicking sound, the clicking sound is the driver of the headphones moving back thus showing you have a good seal. I can't think of anything else to add to this review other than about the little carry pouch they come with which is made of a high quality leatherette and had a satisfying metal closing band which snaps together with a thud. These headphones have outlasted any other that I have owned and are still going strong today. the first pair that my kitten chewed up I managed to fix with a new 3.5mm jack and also still work brilliantly to this day (almost 5 years later after their purchase) I hope this review may help someone :)

### ⭐⭐⭐⭐⭐ Best value for money earphones I have ever had
*by S***N on 27 June 2026*

3rd time buying, last me about a year and a half each time until the cabling starts to wear away but I used them almost all day everyday for work and personal use. Great sound quality, comfourtable, light and when paried with some audio software like SteelSeries Sonar etc they are also great for gaming, couldn't recommend more for the price.

### ⭐⭐⭐⭐ pretty good, but not perfect
*by G***S on 18 November 2011*

I was looking for some small 'phones to use on the train and in the office. These got rave reviews, for the price, and on Amazon were even cheaper, so how could I not buy them! I must have unusually small ears, because all standard in-ear 'phones just fall out. These come with 3 sets of different sized silicone adapters. The smallest ones just about work for me. In use they are comfortable, but because the 'right' lead is much longer than the 'left' (and not adjustable) it took me a while to get used to slinging it around the back of my neck, which works pretty well. Audio quality is pretty good, though bass is a bit lacking. To be expected I guess with tiny buds! They isolate background noise fairly well so you don't have to have them turned up too loud, but they can generate some volume if you need them to. Even when turned up loud other people don't seem to notice, so they're great on public transport for the 'don't annoy others' factor :-) Downsides to these 'phones (for me) are practical ones: The cable is quite long (which is good) but heavy (which isn't so good), meaning that the sheer weight of it can drag them out of your ears. It would have been really useful if they had included a clip, for shirt collar or wherever, to provide some strain-relief. Luckily I found one that fits on an old 'phone hands-free kit and it REALLY helps. The other thing about the cable is that the material it is made of is very sticky, like those easy-grip coatings and covers you get on some things. This means that it catches and drags on almost everything, which again doesn't help when there is no clip to resist the pulling. Overall I like them. They stay in most of the day, sound good and are comfortable. Greg

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-05*